subject:(supercritical fluid extraction)

University of Guelph

1. Rosenthal, Angelique. The Safe Design of a Continuous Supercritical Fluid Extraction System for the Treatment of Drill Cuttings.

Degree: Master of Applied Science, School of Engineering, 2012, University of Guelph

URL: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/3373

► The objective of this research was to design a pilot scale continuous supercritical fluid extraction (SFE) system for the treatment of drill cuttings.The design includes:… (more)

Subjects/Keywords: supercritical fluid; supercritical fluid extraction; drill cuttings

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Rosenthal, A. (2012). The Safe Design of a Continuous Supercritical Fluid Extraction System for the Treatment of Drill Cuttings. (Masters Thesis). University of Guelph. Retrieved from https://atrium.lib.uoguelph.ca/xmlui/handle/10214/3373

Chicago Manual of Style (16^th Edition):

Rosenthal, Angelique. “The Safe Design of a Continuous Supercritical Fluid Extraction System for the Treatment of Drill Cuttings.” 2012. Masters Thesis, University of Guelph. Accessed January 18, 2021. https://atrium.lib.uoguelph.ca/xmlui/handle/10214/3373.

MLA Handbook (7^th Edition):

Rosenthal, Angelique. “The Safe Design of a Continuous Supercritical Fluid Extraction System for the Treatment of Drill Cuttings.” 2012. Web. 18 Jan 2021.

Vancouver:

Rosenthal A. The Safe Design of a Continuous Supercritical Fluid Extraction System for the Treatment of Drill Cuttings. [Internet] [Masters thesis]. University of Guelph; 2012. [cited 2021 Jan 18]. Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/3373.

Council of Science Editors:

Rosenthal A. The Safe Design of a Continuous Supercritical Fluid Extraction System for the Treatment of Drill Cuttings. [Masters Thesis]. University of Guelph; 2012. Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/3373

Oregon State University

2. Spence, Amy J. An evaluation into the optimization and application of supercritical fluid extraction and the processing impact on the components in filtrated buttermilk powder.

Degree: PhD, Food Science and Technology, 2008, Oregon State University

URL: http://hdl.handle.net/1957/9043

► The milk fat globule membrane, a major component in buttermilk, contains many complex lipids known to be involved in a variety of biological processes. Phospholipids,… (more)

▼ The milk fat globule membrane, a major component in buttermilk, contains many complex lipids known to be involved in a variety of biological processes. Phospholipids, including sphingolipids, exhibit antioxidative, anticarcinogenic, and antiatherogenic properties and have essential roles in numerous cell functions. Filtration coupled with supercritical fluid extraction (SFE) may provide a method of concentrating these nutritionally valuable lipids into a novel ingredient. The objective of this dissertation was to evaluate the SFE process as a method to enrich polar lipids in buttermilk powder. The first part of this dissertation involved the optimization of the SFE treatment for buttermilk powder. Pressure and temperature treatment factors were assessed as were the role of matrix powder additions. The parameters at 350 bar and 50°C displayed enhanced extraction efficiency of triacylglycerol removal with minimal disruption to other buttermilk components. The addition of diatomaceous earth, Teflon® beads and physical vibration were shown to help reduce total lipid by 86%, 78% and 70%, respectively. The second part of the study was to apply the optimized SFE treatment to two different sources of buttermilk powder, regular and whey cream, also passed through two different filtration modes prior to drying. The buttermilk powders were compared in terms of lipid extraction efficiency and by assessing compositional differences of initial and final products, as well as the lipids extracted from the powder. After three extractions, SFE processing reduced the total fat, namely non-polar lipids, by 38 - 55% and phospholipids were concentrated by a 5-fold factor in the powders. Specific molecular fatty acid combinations on the sphingosine backbone of sphingomyelin from the treated buttermilk powder were characterized to show unique composition. Finally, the thermal stability of ultrafiltrated whey cream buttermilk powder prior to and following SFE treatment was observed. Salt as well as pH levels were adjusted in the reconstituted powders and protein agglomeration upon heating was assessed. Results showed that in comparison to whey protein isolate, the SFE process enhances thermal stability by reducing protein aggregation, indicating the processed whey cream buttermilk powder to be a unique product with an interesting thermal profile and composition. Filtration followed by supercritical fluid extraction processing is an effective tool for enriching bioactive lipids in both sweet and whey cream buttermilk powder, opening the potential for novel food ingredients. Advisors/Committee Members: Qian, Michael (advisor), Jimenez, Rafael (committee member).

Subjects/Keywords: Supercritical Fluid Extraction; Buttermilk

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Spence, A. J. (2008). An evaluation into the optimization and application of supercritical fluid extraction and the processing impact on the components in filtrated buttermilk powder. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/9043

Chicago Manual of Style (16^th Edition):

Spence, Amy J. “An evaluation into the optimization and application of supercritical fluid extraction and the processing impact on the components in filtrated buttermilk powder.” 2008. Doctoral Dissertation, Oregon State University. Accessed January 18, 2021. http://hdl.handle.net/1957/9043.

MLA Handbook (7^th Edition):

Spence, Amy J. “An evaluation into the optimization and application of supercritical fluid extraction and the processing impact on the components in filtrated buttermilk powder.” 2008. Web. 18 Jan 2021.

Vancouver:

Spence AJ. An evaluation into the optimization and application of supercritical fluid extraction and the processing impact on the components in filtrated buttermilk powder. [Internet] [Doctoral dissertation]. Oregon State University; 2008. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/1957/9043.

Council of Science Editors:

Spence AJ. An evaluation into the optimization and application of supercritical fluid extraction and the processing impact on the components in filtrated buttermilk powder. [Doctoral Dissertation]. Oregon State University; 2008. Available from: http://hdl.handle.net/1957/9043

Hong Kong University of Science and Technology

3. Lin, Candy Sze Man. Production of high-value added products using supercritical fluid technologies.

Degree: 2012, Hong Kong University of Science and Technology

URL: http://repository.ust.hk/ir/Record/1783.1-7476 ; https://doi.org/10.14711/thesis-b1165707 ; http://repository.ust.hk/ir/bitstream/1783.1-7476/1/th_redirect.html

► The purpose of this study is to better understand the use of carbon dioxide (CO2) supercritical fluid based separation or fabrication techniques to produce high-quality,… (more)

▼ The purpose of this study is to better understand the use of carbon dioxide (CO2) supercritical fluid based separation or fabrication techniques to produce high-quality, high-value added materials, particularly from a solubility perspective. Supercritical fluid is environmentally friendly as compared with organic solvents and possesses properties such as liquid-like densities and high diffusivities that are favorable to various processing operations. In such an operation, the raw materials are processed to yield special properties and improved product attributes to benefit the eventual application. However, due to the different roles that a supercritical fluid takes in different processes, a thorough understanding of the physicochemical phenomena to utilize it properly in each process is essential to obtain a successful product. Indeed, the successful development and design of each technique requires detailed phase behavioral information of the components involved and understanding of the process mechanisms. In this research, we highlight the potentials of supercritical fluid technologies for the production of high-value added materials by developing methods involving chromatography, crystallization, extraction and reaction. Four different processes were investigated to address the issues involved in developing the separation and fabrication processes that can lead to the output of targeted quality products. The first project demonstrates the course of developing a separation process by supercritical fluid chromatography (SFC) that can simultaneously separate high purity single enantiomers of (-)Tröger’s Base 99.19% and (+)Tröger’s Base 98.82% from a racemic mixture. Supercritical CO2 is used as the mobile phase and slight changes in the fluid dynamics would alter separation quality. Solubility parameter calculations and the ternary phase diagram of the system, assist in developing a base case scenario that can be used as a starting point for the separation. An iterative parameter optimization approach then follows to guide decision making to achieve separation performance target. This procedure relies on two causal tables, a constructed compilation of own experiments and those obtained from the literature, that summarizes the qualitative relationship between chromatographic characteristics and separation performance and those between chromatographic characteristics and operating parameters. The second process focuses on obtaining nanoparticles with narrow particle size distributions for the development of a more effective pharmaceutical formulation. The particle formation process by precipitation through compressed anti-solvent (PCA) technique was carried out on salicylic acid as the model drug, ethanol and acetone as the cosolvent, and supercritical CO2 as the anti-solvent. Solubility determination by experiments, and visualization of phase diagrams facilitated the identification of the regions for operation and to effectively precipitate small and uniform particles. It was discovered that particles in the…

Subjects/Keywords: Supercritical fluid chromatography ; Supercritical fluid extraction ; Supercritical fluids

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Lin, C. S. M. (2012). Production of high-value added products using supercritical fluid technologies. (Thesis). Hong Kong University of Science and Technology. Retrieved from http://repository.ust.hk/ir/Record/1783.1-7476 ; https://doi.org/10.14711/thesis-b1165707 ; http://repository.ust.hk/ir/bitstream/1783.1-7476/1/th_redirect.html

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lin, Candy Sze Man. “Production of high-value added products using supercritical fluid technologies.” 2012. Thesis, Hong Kong University of Science and Technology. Accessed January 18, 2021. http://repository.ust.hk/ir/Record/1783.1-7476 ; https://doi.org/10.14711/thesis-b1165707 ; http://repository.ust.hk/ir/bitstream/1783.1-7476/1/th_redirect.html.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lin, Candy Sze Man. “Production of high-value added products using supercritical fluid technologies.” 2012. Web. 18 Jan 2021.

Vancouver:

Lin CSM. Production of high-value added products using supercritical fluid technologies. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2012. [cited 2021 Jan 18]. Available from: http://repository.ust.hk/ir/Record/1783.1-7476 ; https://doi.org/10.14711/thesis-b1165707 ; http://repository.ust.hk/ir/bitstream/1783.1-7476/1/th_redirect.html.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lin CSM. Production of high-value added products using supercritical fluid technologies. [Thesis]. Hong Kong University of Science and Technology; 2012. Available from: http://repository.ust.hk/ir/Record/1783.1-7476 ; https://doi.org/10.14711/thesis-b1165707 ; http://repository.ust.hk/ir/bitstream/1783.1-7476/1/th_redirect.html

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Oregon State University

4. Yi, Jung-Seok. The extraction of pentachlorophenol from pressure treated wood using supercritical carbon dioxide.

Degree: MS, Chemical Engineering, 1993, Oregon State University

URL: http://hdl.handle.net/1957/37192

► The extraction of pentachlorophenol (PCP) from pressure treated wood wafers with supercritical carbon dioxide has been studied. Experimental data were obtained for the effects of… (more)

Subjects/Keywords: Supercritical fluid extraction

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Yi, J. (1993). The extraction of pentachlorophenol from pressure treated wood using supercritical carbon dioxide. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/37192

Chicago Manual of Style (16^th Edition):

Yi, Jung-Seok. “The extraction of pentachlorophenol from pressure treated wood using supercritical carbon dioxide.” 1993. Masters Thesis, Oregon State University. Accessed January 18, 2021. http://hdl.handle.net/1957/37192.

MLA Handbook (7^th Edition):

Yi, Jung-Seok. “The extraction of pentachlorophenol from pressure treated wood using supercritical carbon dioxide.” 1993. Web. 18 Jan 2021.

Vancouver:

Yi J. The extraction of pentachlorophenol from pressure treated wood using supercritical carbon dioxide. [Internet] [Masters thesis]. Oregon State University; 1993. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/1957/37192.

Council of Science Editors:

Yi J. The extraction of pentachlorophenol from pressure treated wood using supercritical carbon dioxide. [Masters Thesis]. Oregon State University; 1993. Available from: http://hdl.handle.net/1957/37192

North-West University

5. Mastoroudes, Bruce De Cliffordt. Feasibility of thorium extraction from a solid monazite matrix utilizing supercritical CO2 with TBP and HFA as chelates / Bruce De Cliffordt Mastoroudes .

Degree: 2014, North-West University

URL: http://hdl.handle.net/10394/16267

► With current energy demands globally and locally, nuclear energy remains one of the top competitors for cleaner and sustainable energy. The nuclear industry requires more… (more)

▼ With current energy demands globally and locally, nuclear energy remains one of the top competitors for cleaner and sustainable energy. The nuclear industry requires more inherent safety and proliferation resistance in reactor design. Thorium has therefore been identified as a possible fuel for future nuclear reactors that can comply with these requirements. However current extraction techniques are expensive, time consuming and generate large quantities of hazardous waste. A possible alternative to conventional solvent extraction of thorium is SFE (Supercritical Fluid Extraction). A monazite sample from the Steenkampskraal mine was investigated using SEM (Scanning Electron Microscope) analysis methods to determine the distribution of thorium in the grains that could potentially complicate the effectiveness of the SFE extraction method if zoning is present. The results show a homogeneous distribution with no discernable zonation in the grains. The concentration of Th, Ce and Nd was determined by quantitative MPA (Micro Probe Analysis). The results obtained from the MPA point analysis on several grains show average Th, Ce and Nd concentrations of 6.5 wt. %, 24.1 wt. % and 9.7 wt. % respectively. The extraction of Th+4 from a filter paper was conducted to verify the extraction procedure and extractability of transition elements employing SFE. The extraction was conducted using supercritical CO2 and methanol as co-solvent with TBP (Tributyl Phosphate) and HFA (Hexafluoroacetylacetone) added in situ as chelates. ICP-MS results for the Th+4 extraction procedure showed extraction efficiency of 53 % compared to 83 % in literature (Kumar et al. 2009). This marked difference in extraction efficiency is attributed to ineffective trapping methods employed and lack of prior maintenance and support on the extraction apparatus. Subsequently all further extracted samples of Th from monazite were tested using XRF analysis methods. Due to the lack of prior maintenance on the extraction apparatus several technical breakdowns were encountered and addressed from a mechanical engineering standpoint. The operational effectiveness of the modified apparatus was verified through the extraction of marula seed oil and compared with another supercritical fluid (SF) extractor to show 50 % extraction efficiency in each case. A review of the literature indicated that the crystal chemical requirements for substitution of trivalent (Ce+3) for tetravalent (Th+4) may be fulfilled during SFE processes. Experimental substitution extractions were conducted by addition of different chelates and were conducted by subjecting the monazite samples to 20 MPa pressure for 180 min static flow and 10 min continuous flow extraction times with a CO2 flow rate of 2 mL/min with 10 % co-solvent flow rate. The results of the two sets of substitution extractions namely α and β show no clear indication of Th extraction. The maximum theoretical efficiency obtainable under current extraction equipment limitations was calculated as 12%. The XRF analysis error margin was…

Subjects/Keywords: Supercritical fluid; CO2; Chelates; Thorium; Rare earth elements; Supercritical fluid extraction; Solvent extraction

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Mastoroudes, B. D. C. (2014). Feasibility of thorium extraction from a solid monazite matrix utilizing supercritical CO2 with TBP and HFA as chelates / Bruce De Cliffordt Mastoroudes . (Thesis). North-West University. Retrieved from http://hdl.handle.net/10394/16267

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Mastoroudes, Bruce De Cliffordt. “Feasibility of thorium extraction from a solid monazite matrix utilizing supercritical CO2 with TBP and HFA as chelates / Bruce De Cliffordt Mastoroudes .” 2014. Thesis, North-West University. Accessed January 18, 2021. http://hdl.handle.net/10394/16267.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Mastoroudes, Bruce De Cliffordt. “Feasibility of thorium extraction from a solid monazite matrix utilizing supercritical CO2 with TBP and HFA as chelates / Bruce De Cliffordt Mastoroudes .” 2014. Web. 18 Jan 2021.

Vancouver:

Mastoroudes BDC. Feasibility of thorium extraction from a solid monazite matrix utilizing supercritical CO2 with TBP and HFA as chelates / Bruce De Cliffordt Mastoroudes . [Internet] [Thesis]. North-West University; 2014. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/10394/16267.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Mastoroudes BDC. Feasibility of thorium extraction from a solid monazite matrix utilizing supercritical CO2 with TBP and HFA as chelates / Bruce De Cliffordt Mastoroudes . [Thesis]. North-West University; 2014. Available from: http://hdl.handle.net/10394/16267

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Alberta

6. La, Helen. Extraction of bitumen from Athabasca oil sand slurry using supercritical carbon Dioxide.

Degree: MS, Department of Civil and Environmental Engineering, 2011, University of Alberta

URL: https://era.library.ualberta.ca/files/8910jt57v

► Extraction of hydrocarbons from an Athabasca oil sand slurry were conducted using supercritical carbon dioxide (SC-CO2). The oil sand was slurried to a 1:1 ratio… (more)

Subjects/Keywords: Supercritical fluid extraction; Bitumen; Athabasca oil sand; Slurry extraction; Supercritical carbon dioxide extraction

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

La, H. (2011). Extraction of bitumen from Athabasca oil sand slurry using supercritical carbon Dioxide. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/8910jt57v

Chicago Manual of Style (16^th Edition):

La, Helen. “Extraction of bitumen from Athabasca oil sand slurry using supercritical carbon Dioxide.” 2011. Masters Thesis, University of Alberta. Accessed January 18, 2021. https://era.library.ualberta.ca/files/8910jt57v.

MLA Handbook (7^th Edition):

La, Helen. “Extraction of bitumen from Athabasca oil sand slurry using supercritical carbon Dioxide.” 2011. Web. 18 Jan 2021.

Vancouver:

La H. Extraction of bitumen from Athabasca oil sand slurry using supercritical carbon Dioxide. [Internet] [Masters thesis]. University of Alberta; 2011. [cited 2021 Jan 18]. Available from: https://era.library.ualberta.ca/files/8910jt57v.

Council of Science Editors:

La H. Extraction of bitumen from Athabasca oil sand slurry using supercritical carbon Dioxide. [Masters Thesis]. University of Alberta; 2011. Available from: https://era.library.ualberta.ca/files/8910jt57v

University of Alberta

7. Fang, Yi. Extraction of hydrocarbons from oil sand using supercritical carbon dioxid.

Degree: MS, Department of Civil and Environmental Engineering, 2010, University of Alberta

URL: https://era.library.ualberta.ca/files/9g54xk200

► This study investigates the extraction of hydrocarbons from oil sand using supercritical carbon dioxide (SC CO2). Experiments were carried out on three different types of… (more)

Subjects/Keywords: supercritical fluid extraction; oil sand; supercritical carbon dioxid; Dean-Stark extraction; hydrocarbons

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Fang, Y. (2010). Extraction of hydrocarbons from oil sand using supercritical carbon dioxid. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/9g54xk200

Chicago Manual of Style (16^th Edition):

Fang, Yi. “Extraction of hydrocarbons from oil sand using supercritical carbon dioxid.” 2010. Masters Thesis, University of Alberta. Accessed January 18, 2021. https://era.library.ualberta.ca/files/9g54xk200.

MLA Handbook (7^th Edition):

Fang, Yi. “Extraction of hydrocarbons from oil sand using supercritical carbon dioxid.” 2010. Web. 18 Jan 2021.

Vancouver:

Fang Y. Extraction of hydrocarbons from oil sand using supercritical carbon dioxid. [Internet] [Masters thesis]. University of Alberta; 2010. [cited 2021 Jan 18]. Available from: https://era.library.ualberta.ca/files/9g54xk200.

Council of Science Editors:

Fang Y. Extraction of hydrocarbons from oil sand using supercritical carbon dioxid. [Masters Thesis]. University of Alberta; 2010. Available from: https://era.library.ualberta.ca/files/9g54xk200

Texas Tech University

8. Sethuraman, Ravishankar. Supercritical fluid extraction of capsaicin from peppers.

Degree: Chemical Engineering, 1997, Texas Tech University

URL: http://hdl.handle.net/2346/16176

► Supercritical Fluid Technology utilizes the unique physico-chemical properties of solvents in numerous applications. Supercritical Fluid (SF) Technology has become an interdisciplinary field, utilized by chemical… (more)

Subjects/Keywords: Extraction; Supercritical fluid extraction; Capsaicin

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Sethuraman, R. (1997). Supercritical fluid extraction of capsaicin from peppers. (Thesis). Texas Tech University. Retrieved from http://hdl.handle.net/2346/16176

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Sethuraman, Ravishankar. “Supercritical fluid extraction of capsaicin from peppers.” 1997. Thesis, Texas Tech University. Accessed January 18, 2021. http://hdl.handle.net/2346/16176.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Sethuraman, Ravishankar. “Supercritical fluid extraction of capsaicin from peppers.” 1997. Web. 18 Jan 2021.

Vancouver:

Sethuraman R. Supercritical fluid extraction of capsaicin from peppers. [Internet] [Thesis]. Texas Tech University; 1997. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/2346/16176.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Sethuraman R. Supercritical fluid extraction of capsaicin from peppers. [Thesis]. Texas Tech University; 1997. Available from: http://hdl.handle.net/2346/16176

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Lund

9. Abrahamsson, Victor. Fundamental research on supercritical fluid extraction kinetics : From on-line measurements to inverse modeling.

Degree: 2016, University of Lund

URL: https://lup.lub.lu.se/record/bf52bcce-55aa-4023-9724-059cf8e27284 ; https://portal.research.lu.se/ws/files/15722515/120581_2_G5_Victor_A_electronic.pdf

► Supercritical fluid extraction is an extraction technique suitable for lipophilic compounds from solid samples. Most commonly supercritical carbon dioxide is the main component in the… (more)

▼ Supercritical fluid extraction is an extraction technique suitable for lipophilic compounds from solid samples. Most commonly supercritical carbon dioxide is the main component in the extraction phase, rendering the technique relatively environmentally benign. The extraction technique is rapid due to the low viscosity and the high diffusivity of analytes in the supercritical extraction phase.The selectivity can be tuned by changing the extraction conditions of pressure, temperature and co-solvent amount. These process parameters along with flow rate and extraction time make optimization of an extraction method rather cumbersome. A fundamental understanding of the extraction process can help to make wise decisions during method development. In this work extractability, partitioning, solubility and internal and external mass transfer resistancehave been studied through inverse modeling.Methods based on in-line spectrophotometric measurements and on-line evaporative light scattering detection have been developed to efficiently acquire extraction curves, i.e., the extraction yield over time. These enable a highthroughput of extractions with high temporal resolution and good precision. The methods were applied to quantify total lipids from linseed and carotenoids, chlorophyll A, ergosterol and total lipids from microalgae. An off-line method for separating carotenoids based on supercritical fluid chromatography was also developed.Methodologies have been developed to acquire models which are calibrated using all experiments, so called complete calibration. It is shown that calibrating one model per experiment does not generate models with reliable parameters with physical meaning. The models can be used for predicting extraction curves within the investigated space of process parameters.Finally, extractability and partitioning are shown to be highly influential on the extraction process. Also, partitioning can give rise to diminishing extraction rates, which has previously believed only to be caused by intraparticlediffusion.

Subjects/Keywords: Analytical Chemistry; supercritical fluid extraction; supercritical fluid chromatography; linseed; microalgae; extraction kinetics; inverse modeling; curve resolution

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Abrahamsson, V. (2016). Fundamental research on supercritical fluid extraction kinetics : From on-line measurements to inverse modeling. (Doctoral Dissertation). University of Lund. Retrieved from https://lup.lub.lu.se/record/bf52bcce-55aa-4023-9724-059cf8e27284 ; https://portal.research.lu.se/ws/files/15722515/120581_2_G5_Victor_A_electronic.pdf

Chicago Manual of Style (16^th Edition):

Abrahamsson, Victor. “Fundamental research on supercritical fluid extraction kinetics : From on-line measurements to inverse modeling.” 2016. Doctoral Dissertation, University of Lund. Accessed January 18, 2021. https://lup.lub.lu.se/record/bf52bcce-55aa-4023-9724-059cf8e27284 ; https://portal.research.lu.se/ws/files/15722515/120581_2_G5_Victor_A_electronic.pdf.

MLA Handbook (7^th Edition):

Abrahamsson, Victor. “Fundamental research on supercritical fluid extraction kinetics : From on-line measurements to inverse modeling.” 2016. Web. 18 Jan 2021.

Vancouver:

Abrahamsson V. Fundamental research on supercritical fluid extraction kinetics : From on-line measurements to inverse modeling. [Internet] [Doctoral dissertation]. University of Lund; 2016. [cited 2021 Jan 18]. Available from: https://lup.lub.lu.se/record/bf52bcce-55aa-4023-9724-059cf8e27284 ; https://portal.research.lu.se/ws/files/15722515/120581_2_G5_Victor_A_electronic.pdf.

Council of Science Editors:

Abrahamsson V. Fundamental research on supercritical fluid extraction kinetics : From on-line measurements to inverse modeling. [Doctoral Dissertation]. University of Lund; 2016. Available from: https://lup.lub.lu.se/record/bf52bcce-55aa-4023-9724-059cf8e27284 ; https://portal.research.lu.se/ws/files/15722515/120581_2_G5_Victor_A_electronic.pdf

University of Alberta

10. Jones, Christopher Robert. Treatment of oily drill cuttings slurries using supercritical carbon dioxide.

Degree: MS, Department of Civil and Environmental Engineering, 2010, University of Alberta

URL: https://era.library.ualberta.ca/files/9019s2885

► Research was conducted into using supercritical fluid extraction (SFE) for removing hydrocarbons from drill cuttings slurries, which will be used in a pilot-scale continuous SFE… (more)

Subjects/Keywords: supercritical fluid; extraction; hydrocarbon; water; drill cuttings; slurry; carbon dioxide

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Jones, C. R. (2010). Treatment of oily drill cuttings slurries using supercritical carbon dioxide. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/9019s2885

Chicago Manual of Style (16^th Edition):

Jones, Christopher Robert. “Treatment of oily drill cuttings slurries using supercritical carbon dioxide.” 2010. Masters Thesis, University of Alberta. Accessed January 18, 2021. https://era.library.ualberta.ca/files/9019s2885.

MLA Handbook (7^th Edition):

Jones, Christopher Robert. “Treatment of oily drill cuttings slurries using supercritical carbon dioxide.” 2010. Web. 18 Jan 2021.

Vancouver:

Jones CR. Treatment of oily drill cuttings slurries using supercritical carbon dioxide. [Internet] [Masters thesis]. University of Alberta; 2010. [cited 2021 Jan 18]. Available from: https://era.library.ualberta.ca/files/9019s2885.

Council of Science Editors:

Jones CR. Treatment of oily drill cuttings slurries using supercritical carbon dioxide. [Masters Thesis]. University of Alberta; 2010. Available from: https://era.library.ualberta.ca/files/9019s2885

Stellenbosch University

11. Louw, Jeanne. Supercritical water gasification of wood-related products: a thermodynamic and experimental study.

Degree: PhD, Process Engineering, 2016, Stellenbosch University

URL: http://hdl.handle.net/10019.1/100099

►

ENGLISH ABSTRACT: Supercritical water gasification (SCWG) is a method through which energy can be harvested, allowing high-‐energy gases such as hydrogen and methane to be… (more)

▼

ENGLISH ABSTRACT: Supercritical water gasification (SCWG) is a method through which energy can be harvested, allowing high-‐energy gases such as hydrogen and methane to be generated from wet organic materials without prior energy-‐intensive drying. This thesis provides new insight into and an improved understanding of both the thermodynamic equilibrium and practical kinetic behaviour during SCWG of three wood-‐derived products, namely wood chips, primary paper sludge and wood-‐based pyrolysis char. A method, based on thermodynamic equilibrium calculations and the feedstock composition (molar H/C and O/C ratio) was developed to aid in the selection of suitable feed material and operating conditions for SCWG1. It was shown that, thermodynamically, feed material containing less oxygen, such as pyrolysis char, might be a promising feed material to achieve high H2 and CH4 yields as well as a gas product with a high calorific value. Experimental and theoretical thermodynamic equilibrium results are presented for SCWG of primary paper waste sludge (PWS)2, E.grandis wood chips and various related pyrolysis chars3. The effect of various parameters that may influence the kinetic behaviour were assessed, including catalyst type, catalyst loading, reaction time and feedstock composition (specifically O/C ratio and volatile matter content). A gas product relatively close to the calculated thermodynamic composition was produced during SCWG of PWS and E.grandis using a high loading of heterogeneous catalyst (0.5 – 1 g/gfeed,dry Ni/Al2O3-‐SiO2) and longer reaction times (60 – 120 min). Furthermore, significantly higher conversion of carbon to the gas phase was achieved with Ni/Al2O3-‐SiO2 than with a homogeneous catalyst (K2CO3). While feed material with lower O/C ratios typically resulted in higher thermodynamic equilibrium CH4 yields and gasification efficiencies, these feed material resulted in the lowest experimental CH4 yields and gasification efficiencies. Furthermore, a linear relationship between the carbon efficiency (CE) and both the volatile matter content and O/C ratio of the feed material was found to hold true in both catalytic and non-‐catalytic experiments. The results suggest that, although thermodynamic calculations disregard the volatile matter content of the feed material, very useful predictive information can still be obtained from such calculations. It should therefore not be disregarded when considering a specific material as possible feedstock for SCWG. To summarise, this dissertation provides more insight into both the thermodynamic equilibrium and possible kinetic effects associated with SCWG for various wood-‐related products. The major contributions are encapsulated in three peer reviewed journal publications.

AFRIKAANSE OPSOMMING: Superkritiese water vergassing (SKWVG) is 'n metode waardeur hoë-‐energie gasse soos waterstof en metaan geproduseer kan word deur van nat organiese materiaal as voer materiaal gebruik te maak sonder energie-‐intensiewe…

Advisors/Committee Members: Burger, A. J., Schwarz, C. E., Stellenbosch University. Faculty of Engineering. Dept. of Process Engineering..

Subjects/Keywords: Supercritical fluid extraction; Wood products; Thermodynamic equilibrium; Coal gasification; UCTD

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Louw, J. (2016). Supercritical water gasification of wood-related products: a thermodynamic and experimental study. (Doctoral Dissertation). Stellenbosch University. Retrieved from http://hdl.handle.net/10019.1/100099

Chicago Manual of Style (16^th Edition):

Louw, Jeanne. “Supercritical water gasification of wood-related products: a thermodynamic and experimental study.” 2016. Doctoral Dissertation, Stellenbosch University. Accessed January 18, 2021. http://hdl.handle.net/10019.1/100099.

MLA Handbook (7^th Edition):

Louw, Jeanne. “Supercritical water gasification of wood-related products: a thermodynamic and experimental study.” 2016. Web. 18 Jan 2021.

Vancouver:

Louw J. Supercritical water gasification of wood-related products: a thermodynamic and experimental study. [Internet] [Doctoral dissertation]. Stellenbosch University; 2016. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/10019.1/100099.

Council of Science Editors:

Louw J. Supercritical water gasification of wood-related products: a thermodynamic and experimental study. [Doctoral Dissertation]. Stellenbosch University; 2016. Available from: http://hdl.handle.net/10019.1/100099

Oregon State University

12. Tang, Yi-Min. Itraconazole formation using supercritical carbon dioxide.

Degree: MS, Chemical Engineering, 2000, Oregon State University

URL: http://hdl.handle.net/1957/33376

Subjects/Keywords: Supercritical fluid extraction – Mathematical models

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Tang, Y. (2000). Itraconazole formation using supercritical carbon dioxide. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/33376

Chicago Manual of Style (16^th Edition):

Tang, Yi-Min. “Itraconazole formation using supercritical carbon dioxide.” 2000. Masters Thesis, Oregon State University. Accessed January 18, 2021. http://hdl.handle.net/1957/33376.

MLA Handbook (7^th Edition):

Tang, Yi-Min. “Itraconazole formation using supercritical carbon dioxide.” 2000. Web. 18 Jan 2021.

Vancouver:

Tang Y. Itraconazole formation using supercritical carbon dioxide. [Internet] [Masters thesis]. Oregon State University; 2000. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/1957/33376.

Council of Science Editors:

Tang Y. Itraconazole formation using supercritical carbon dioxide. [Masters Thesis]. Oregon State University; 2000. Available from: http://hdl.handle.net/1957/33376

University of Melbourne

13. BALACHANDRAN, SREERAJ. Mass transfer enhancement of supercritical fluid extraction from a model herb.

Degree: 2006, University of Melbourne

URL: http://hdl.handle.net/11343/37442

► The use of supercritical fluids to separate natural materials from foods has attracted much attention recently. However, the commercial success of supercritical carbon dioxide for… (more)

▼ The use of supercritical fluids to separate natural materials from foods has attracted much attention recently. However, the commercial success of supercritical carbon dioxide for this application has been limited because it can only separate non-polar substances and the use of high pressure requires a high capital investment. The current study has explored two different methods to enhance the extraction yield and thereby widen the applicability of supercritical fluid extraction. These methods are 1. The effect of the natural moisture content of the substrate 2. The concurrent use of ultrasonic vibration Ginger (Zingiber Officinale Roscoe), which belongs to the Zingerberceae family is used as a model herb in this work. It is found that the use of a new season high moisture content fresh ginger (96 wt % substrate moisture content) for supercritical extraction provides a greater yield than the use of a dried ginger feed (. 1 wt% moisture content) as is currently employed commercially. However, when more fibrous low moisture content old season ginger is employed (. 85 wt % moisture content), the fresh ginger provides lower yield. This variation is considered to be due to differences in the structure and moisture content of the ginger matrix. Mathematical modeling of the new season high moisture content fresh ginger data shows that the effective diffusivity is higher than that of freeze-dried ginger. However, in the case of old season low moisture content ginger batches, the effective diffusivity is higher in the freeze-dried sample. This shows that when a ginger sample of high moisture content (96% moisture) is used, the high water content acts as a swelling agent to enhance the extraction rate and yield. The solubility parameter is comparable across different ginger batches, which indicates that the entraining effect of moisture is negligible. For further work, it may be possible to consider pre-soaking the old season ginger to increase the moisture content to > 95% (wt %) in order to improve the yield. High Performance Liquid Chromatography (HPLC) and Gas Chromatography — Mass Spectrometry (GC-MS) analyses are performed on the fresh, freeze-dried and oven-dried ginger extracts. This analysis shows that the fresh and freeze-dried ginger extracts contain more natural characteristic flavor and pungency than the oven-dried feed which is commonly used in industry. Under the influence of ultrasound, the extraction yield is increased by up to 30%. This higher extraction yield is attributed to disruption of the cell structure and an increase in the accessibility of the solvent to the internal particle structure, which enhances the intra-particle diffusivity. FESEM images of the surface of different ginger particles…

Subjects/Keywords: supercritical fluid extraction; ginger

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

BALACHANDRAN, S. (2006). Mass transfer enhancement of supercritical fluid extraction from a model herb. (Doctoral Dissertation). University of Melbourne. Retrieved from http://hdl.handle.net/11343/37442

Chicago Manual of Style (16^th Edition):

BALACHANDRAN, SREERAJ. “Mass transfer enhancement of supercritical fluid extraction from a model herb.” 2006. Doctoral Dissertation, University of Melbourne. Accessed January 18, 2021. http://hdl.handle.net/11343/37442.

MLA Handbook (7^th Edition):

BALACHANDRAN, SREERAJ. “Mass transfer enhancement of supercritical fluid extraction from a model herb.” 2006. Web. 18 Jan 2021.

Vancouver:

BALACHANDRAN S. Mass transfer enhancement of supercritical fluid extraction from a model herb. [Internet] [Doctoral dissertation]. University of Melbourne; 2006. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/11343/37442.

Council of Science Editors:

BALACHANDRAN S. Mass transfer enhancement of supercritical fluid extraction from a model herb. [Doctoral Dissertation]. University of Melbourne; 2006. Available from: http://hdl.handle.net/11343/37442

14. Li, Bingyi. Selective extraction of phospholipids from dairy powders using supercritical fluid extraction.

Degree: MS, Food Science Institute, 2017, Kansas State University

URL: http://hdl.handle.net/2097/38171

► In recent years, the interest in functional components such as phospholipids (PLs) is increasing as a result of growing awareness of their health benefits. PLs… (more)

▼ In recent years, the interest in functional components such as phospholipids (PLs) is increasing as a result of growing awareness of their health benefits. PLs affect several cell functions, such as growth, molecular transport system, memory processing, stress responses, and central nervous system myelination. Many studies have shown that the neutral lipids can be successfully extracted using supercritical carbon dioxide (SCO₂) from different types of foods such as egg, canola, pumpkin seed, fish and dairy powders. It is an alternative method to avoid the use of large quantities organic solvents. The SCO₂ is a safe, environmentally friendly and economical process to extract edible lipids from a variety of matrices. However, a modifier such as ethanol is needed to fractionate PLs due to limited solubility of PLs in SCO₂. The objectives of this study were to optimize the SFE process parameters and to determine the effect of pressure, temperature, and ethanol concentration on the extraction efficiency of PLs from whey protein phospholipid concentrate (WPPC) and buttermilk powder (BMP). Three different batches of WPPC and BMP were obtained from a commercial manufacturer and followed a unique two-step extraction process to isolate PLs from WPPC and BMP. In Step-1, neat supercritical CO₂ was used to remove all the neutral lipids at 414 bar pressure, 60 °C sample temperature, and 5 L/min CO₂ flow rate. The spent solids, the powder left after the first step extraction, were used to extract PLs in the second step. The Step-2 (SCO₂-Ethanol) process was optimized in terms of pressure (350, 414 and 550 bar), temperature (40 °C and 60 °C) and concentration of ethanol (10%, 15% and 20%) as independent factors. All the lipid fractions were analyzed by high performance lipid chromatography (HPLC) and thin layer chromatography (TLC). For WPPC, only ethanol concentration had significant effect (P < 0.05) on the amount of PLs extracted after the Step-2. On the other hand, temperature and ethanol concentration were significantly (P < 0.05) affected the efficiency of SFE for BMP. The optimal processing conditions for WPPC and BMP were 350 bar pressure, 60 °C sample temperature and 15% concentration of ethanol, and 550 bar of pressure, 60 °C sample temperature and 15% concentration of ethanol, respectively. This study allowed obtaining PLs from dairy co-products such as WPPC and BMP as a separate ingredient and this could be useful in nutraceutical and infant formulations as well as different food products formulations. Advisors/Committee Members: Jayendra K. Amamcharla.

Subjects/Keywords: Supercritical fluid extraction; Whey protein phospholipid concentrate; Pro-cream; Buttermilk powder

13 more images…

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Li, B. (2017). Selective extraction of phospholipids from dairy powders using supercritical fluid extraction. (Masters Thesis). Kansas State University. Retrieved from http://hdl.handle.net/2097/38171

Chicago Manual of Style (16^th Edition):

Li, Bingyi. “Selective extraction of phospholipids from dairy powders using supercritical fluid extraction.” 2017. Masters Thesis, Kansas State University. Accessed January 18, 2021. http://hdl.handle.net/2097/38171.

MLA Handbook (7^th Edition):

Li, Bingyi. “Selective extraction of phospholipids from dairy powders using supercritical fluid extraction.” 2017. Web. 18 Jan 2021.

Vancouver:

Li B. Selective extraction of phospholipids from dairy powders using supercritical fluid extraction. [Internet] [Masters thesis]. Kansas State University; 2017. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/2097/38171.

Council of Science Editors:

Li B. Selective extraction of phospholipids from dairy powders using supercritical fluid extraction. [Masters Thesis]. Kansas State University; 2017. Available from: http://hdl.handle.net/2097/38171

University of Maryland

15. Jarboe, Palma Jean. Supercritical Fluid Extraction of Hydrocarbons from the Marcellus Shale by Using CO2.

Degree: Geology, 2014, University of Maryland

URL: http://hdl.handle.net/1903/15706

► Supercritical carbon dioxide was used to extract n-aliphatic hydrocarbons from samples of Marcellus shale, and to evaluate recovery as a function of sample matrix particle… (more)

Subjects/Keywords: Petroleum geology; Geochemistry; Carbon Dioxide; Hydrocarbons; Marcellus Shale; Supercritical Fluid Extraction

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Jarboe, P. J. (2014). Supercritical Fluid Extraction of Hydrocarbons from the Marcellus Shale by Using CO2. (Thesis). University of Maryland. Retrieved from http://hdl.handle.net/1903/15706

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Jarboe, Palma Jean. “Supercritical Fluid Extraction of Hydrocarbons from the Marcellus Shale by Using CO2.” 2014. Thesis, University of Maryland. Accessed January 18, 2021. http://hdl.handle.net/1903/15706.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Jarboe, Palma Jean. “Supercritical Fluid Extraction of Hydrocarbons from the Marcellus Shale by Using CO2.” 2014. Web. 18 Jan 2021.

Vancouver:

Jarboe PJ. Supercritical Fluid Extraction of Hydrocarbons from the Marcellus Shale by Using CO2. [Internet] [Thesis]. University of Maryland; 2014. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/1903/15706.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Jarboe PJ. Supercritical Fluid Extraction of Hydrocarbons from the Marcellus Shale by Using CO2. [Thesis]. University of Maryland; 2014. Available from: http://hdl.handle.net/1903/15706

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

The Ohio State University

16. SREENIVASARAGHAVAN, SOWMYANARASIMHAN. A Study of the Effects of Supercritical CO 2 Treatment on Physicochemical Properties of Spray-Dried Buttermilk Powder to Develop a Novel Dairy Processing Operation.

Degree: MS, Food Science and Technology, 2018, The Ohio State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1534685778937538

► An increase in environmental and health concerns in consumers has led to the demand for `greener’ food processing techniques. Supercritical Fluid Extraction has been demonstrated… (more)

▼ An increase in environmental and health concerns in consumers has led to the demand for `greener’ food processing techniques. Supercritical Fluid Extraction has been demonstrated as a reliable technique to extract triglycerides and volatiles from food, but knowledge of its effect on dairy foods is limited. Buttermilk in the form of spray-dried powder is lauded for its solubility, emulsification, and heat-constancy properties while also providing a uniform creamy flavor as an ingredient various milk and dairy powder formulations. Despite its large market presence, it is regarded as a low-value addition, and there is potential for improvement of powder properties. The objective of this work was to study the triglyceride-extraction ability of supercritical fluid extraction using CO2 and its impact on some key physicochemical properties of defatted spray-dried buttermilk. Initial single-cycle trials were run to determine the optimal flow rate and duration of treatment for maximum triglyceride removal using a Supercritical Fluid Extraction system. A 3-factor central composite design was then used with temperature, pressure, and time as the independent variables to be controlled. A total of 20 2-cycle runs with 6 center point repeats was performed. Samples were subjected to analyses to study triglyceride removal, solubility index, protein solubility, particle size, foaming/foam stability, water activity, hygroscopicity, heating properties, and morphology. The results showed increased triglyceride extraction with increasing temperature and time while increased pressure did not have an appreciable effect. The increased removal of fat corresponded to increase in solubility index and protein solubility up to a temperature, after which a decrease was noted. Increased foaming was observed with increased fat removal, while a decrease in foam stability was seen with increased fat removal. An increase in water activity was observed with increased temperature, pressure, and time while a corresponding decrease in hygroscopicity was observed. No discernable trend was seen in particle size with increase in parameters. Under microscopic observation, the treated powders showed clearly distinguishable decrease in surface sheen, while particle diameters did not show any specific trend. Advisors/Committee Members: Jimenez-Flores, Rafael (Advisor).

Subjects/Keywords: Food Science; Supercritical Fluid Extraction, Dairy, Buttermilk Powder

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

SREENIVASARAGHAVAN, S. (2018). A Study of the Effects of Supercritical CO 2 Treatment on Physicochemical Properties of Spray-Dried Buttermilk Powder to Develop a Novel Dairy Processing Operation. (Masters Thesis). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1534685778937538

Chicago Manual of Style (16^th Edition):

SREENIVASARAGHAVAN, SOWMYANARASIMHAN. “A Study of the Effects of Supercritical CO 2 Treatment on Physicochemical Properties of Spray-Dried Buttermilk Powder to Develop a Novel Dairy Processing Operation.” 2018. Masters Thesis, The Ohio State University. Accessed January 18, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=osu1534685778937538.

MLA Handbook (7^th Edition):

SREENIVASARAGHAVAN, SOWMYANARASIMHAN. “A Study of the Effects of Supercritical CO 2 Treatment on Physicochemical Properties of Spray-Dried Buttermilk Powder to Develop a Novel Dairy Processing Operation.” 2018. Web. 18 Jan 2021.

Vancouver:

SREENIVASARAGHAVAN S. A Study of the Effects of Supercritical CO 2 Treatment on Physicochemical Properties of Spray-Dried Buttermilk Powder to Develop a Novel Dairy Processing Operation. [Internet] [Masters thesis]. The Ohio State University; 2018. [cited 2021 Jan 18]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1534685778937538.

Council of Science Editors:

SREENIVASARAGHAVAN S. A Study of the Effects of Supercritical CO 2 Treatment on Physicochemical Properties of Spray-Dried Buttermilk Powder to Develop a Novel Dairy Processing Operation. [Masters Thesis]. The Ohio State University; 2018. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1534685778937538

Michigan State University

17. Martino, Karina G. (Karina Gorostiaga). Supercritical fluid extraction of quercetin from onion skins.

Degree: MS, 2003, Michigan State University

URL: http://etd.lib.msu.edu/islandora/object/etd:32260

Subjects/Keywords: Quercetin; Supercritical fluid extraction

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Martino, K. G. (. G. (2003). Supercritical fluid extraction of quercetin from onion skins. (Masters Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:32260

Chicago Manual of Style (16^th Edition):

Martino, Karina G (Karina Gorostiaga). “Supercritical fluid extraction of quercetin from onion skins.” 2003. Masters Thesis, Michigan State University. Accessed January 18, 2021. http://etd.lib.msu.edu/islandora/object/etd:32260.

MLA Handbook (7^th Edition):

Martino, Karina G (Karina Gorostiaga). “Supercritical fluid extraction of quercetin from onion skins.” 2003. Web. 18 Jan 2021.

Vancouver:

Martino KG(G. Supercritical fluid extraction of quercetin from onion skins. [Internet] [Masters thesis]. Michigan State University; 2003. [cited 2021 Jan 18]. Available from: http://etd.lib.msu.edu/islandora/object/etd:32260.

Council of Science Editors:

Martino KG(G. Supercritical fluid extraction of quercetin from onion skins. [Masters Thesis]. Michigan State University; 2003. Available from: http://etd.lib.msu.edu/islandora/object/etd:32260

Cornell University

18. Palsdottir, Arna. Supercritical fluid extraction of lithium from geothermal brines using strategically designed 14-crown-4 ethers.

Degree: PhD, Chemical Engineering, 2019, Cornell University

URL: http://hdl.handle.net/1813/67312

► The demand for lithium has risen steadily in the last few decades because of the increased use of rechargeable lithium ion batteries. Lithium ion batteries… (more)

Subjects/Keywords: Supercritical Carbon Dioxide; Chemical engineering; Crown ethers; Lithium; Selective lithium extraction; Supercritical fluid extraction; geothermal; Geology

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Palsdottir, A. (2019). Supercritical fluid extraction of lithium from geothermal brines using strategically designed 14-crown-4 ethers. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/67312

Chicago Manual of Style (16^th Edition):

Palsdottir, Arna. “Supercritical fluid extraction of lithium from geothermal brines using strategically designed 14-crown-4 ethers.” 2019. Doctoral Dissertation, Cornell University. Accessed January 18, 2021. http://hdl.handle.net/1813/67312.

MLA Handbook (7^th Edition):

Palsdottir, Arna. “Supercritical fluid extraction of lithium from geothermal brines using strategically designed 14-crown-4 ethers.” 2019. Web. 18 Jan 2021.

Vancouver:

Palsdottir A. Supercritical fluid extraction of lithium from geothermal brines using strategically designed 14-crown-4 ethers. [Internet] [Doctoral dissertation]. Cornell University; 2019. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/1813/67312.

Council of Science Editors:

Palsdottir A. Supercritical fluid extraction of lithium from geothermal brines using strategically designed 14-crown-4 ethers. [Doctoral Dissertation]. Cornell University; 2019. Available from: http://hdl.handle.net/1813/67312

19. Minty, Brian. Analysis of aqueous matrices using supercritical fluid extraction in conjunction with chromatographic spectroscopic and mass spectrometric techniques.

Degree: PhD, 2004, University of South Wales

URL: https://pure.southwales.ac.uk/en/studentthesis/analysis-of-aqueous-matrices-using-supercritical-fluid-extraction-in-conjunction-with-chromatographic-spectroscopic-and-mass-spectrometric-techniques(fc38e7eb-053c-4a5b-86a4-7726ebccea97).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.409740

► The use and supply of various organic solvents for analytical chemistry is coming under scrutiny due to their environmental impact. International legislation now prevents the… (more)

Subjects/Keywords: 660.284248; Supercritical fluid chromatography; Supercritical fluid extraction

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Minty, B. (2004). Analysis of aqueous matrices using supercritical fluid extraction in conjunction with chromatographic spectroscopic and mass spectrometric techniques. (Doctoral Dissertation). University of South Wales. Retrieved from https://pure.southwales.ac.uk/en/studentthesis/analysis-of-aqueous-matrices-using-supercritical-fluid-extraction-in-conjunction-with-chromatographic-spectroscopic-and-mass-spectrometric-techniques(fc38e7eb-053c-4a5b-86a4-7726ebccea97).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.409740

Chicago Manual of Style (16^th Edition):

Minty, Brian. “Analysis of aqueous matrices using supercritical fluid extraction in conjunction with chromatographic spectroscopic and mass spectrometric techniques.” 2004. Doctoral Dissertation, University of South Wales. Accessed January 18, 2021. https://pure.southwales.ac.uk/en/studentthesis/analysis-of-aqueous-matrices-using-supercritical-fluid-extraction-in-conjunction-with-chromatographic-spectroscopic-and-mass-spectrometric-techniques(fc38e7eb-053c-4a5b-86a4-7726ebccea97).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.409740.

MLA Handbook (7^th Edition):

Minty, Brian. “Analysis of aqueous matrices using supercritical fluid extraction in conjunction with chromatographic spectroscopic and mass spectrometric techniques.” 2004. Web. 18 Jan 2021.

Vancouver:

Minty B. Analysis of aqueous matrices using supercritical fluid extraction in conjunction with chromatographic spectroscopic and mass spectrometric techniques. [Internet] [Doctoral dissertation]. University of South Wales; 2004. [cited 2021 Jan 18]. Available from: https://pure.southwales.ac.uk/en/studentthesis/analysis-of-aqueous-matrices-using-supercritical-fluid-extraction-in-conjunction-with-chromatographic-spectroscopic-and-mass-spectrometric-techniques(fc38e7eb-053c-4a5b-86a4-7726ebccea97).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.409740.

Council of Science Editors:

Minty B. Analysis of aqueous matrices using supercritical fluid extraction in conjunction with chromatographic spectroscopic and mass spectrometric techniques. [Doctoral Dissertation]. University of South Wales; 2004. Available from: https://pure.southwales.ac.uk/en/studentthesis/analysis-of-aqueous-matrices-using-supercritical-fluid-extraction-in-conjunction-with-chromatographic-spectroscopic-and-mass-spectrometric-techniques(fc38e7eb-053c-4a5b-86a4-7726ebccea97).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.409740

University of Vienna

20. Scheuba, Johanna. A supercritical fluid workflow for the fast separation, isolation, and quantification of major constituents in Liquidambar (styrax) resins.

Degree: 2018, University of Vienna

URL: http://othes.univie.ac.at/55566/

► Diese Diplomarbeit zeigt, dass die polaren Verbindungen, o-Vanillin (1), Styracin (2), Vanillin (3), trans-Zimtsäure (4), Vanillinsäure (5) und Shikimisäure (6) mit Geräten, die mit überkritischen… (more)

▼ Diese Diplomarbeit zeigt, dass die polaren Verbindungen, o-Vanillin (1), Styracin (2), Vanillin (3), trans-Zimtsäure (4), Vanillinsäure (5) und Shikimisäure (6) mit Geräten, die mit überkritischen CO2 arbeiten, extrahiert, analysiert, quantifiziert und isoliert werden können. Diese Technologien beinhalten die SFE (überkritische Flüssigextraktion), analytische SFC (überkritische Flüssigchromatographie) und SFC im präparativen Maßstab. Für jeden dieser Schritte wurde ein Protokoll erstellt. Die analytische Methode wurde gemäß den ICH-Leitlinien validiert. Die Verbindungen 2-6 kommen im Balsam, einem harzigen Saft (Styrax) von Liquidambar-Arten, die zur Hamamelidaceae-Familie gehören, vor. Als Anwendungsbeispiel für das entwickelte Protokoll wurden acht Styraxproben (R1-R8) für die Quantifizierung der phenolischen Verbindungen, 1-5, und 6, einer phenolischen Vorstufe, ausgewählt. Die Extraktion wurde mit einem SFE-Gerät mit einer 1:1 Mischung aus Ethanol und CO2 durchgeführt. Ein Ultra-Performance-Convergency-Chromatographie (UPC2) SFCGerät wurde für die Analyse und Quantifizierung der Verbindungen verwendet. Mit der stationären Phase Acquity UPC2 BEH 2-EP (3.0 x 100 mm, 1.7 μm) wurde eine Grundlinientrennung der Verbindungen 1-6 innerhalb von 4 min erreicht. Die mobile Phase bestand aus überkritischem CO2 und Methanol mit 0,1 % Phosphorsäure. Die Zugabe von Phosphorsäure reduzierte die Peakschultern, insbesondere jene der Säuren 4 und 6 effektiv, indem ihr protonierter, ungeladener Zustand sichergestellt wurde. Die vorherrschenden Verbindungen 2, 4 und eine dritte, unbekannte Verbindung (Verbindung 7) wurden aus R6 mittels präparativer SFC (Prep-15) isoliert und rein dargestellt. Die präparative Methode wurde innerhalb von 6 min mit einem Maßstabsverfahren der UPC2-Methode unter Verwendung der Viridis BEH 2-EP (10 x 250 mm; 5 μm) als Säulenmaterial durchgeführt. Zusätzlich zu dem auf diesen Ergebnissen basierenden Manuskript wurde Verbindung 7 durch Interpretation von 1D- und 2D-NMR-Spektren als 3-Phenylpropyl-(E)-cinnamat strukturell aufgeklärt. Weiters wurden 5 und 6 aus Vanilleschoten und Sternanis extrahiert und quantifiziert, da sie in den Styrax-Proben kaum beziehungsweise nicht vorhanden waren. Dies wurde mit den gleichen Methoden wie für die Styraxproben durchgeführt. Als weiterer Teil dieser Diplomarbeit wurde mit SFE ein Extraktionsprotokoll für Triterpene aus dem Medizinalpilz Ganoderma lucidum erstellt.

Subjects/Keywords: 30.00 Naturwissenschaften allgemein: Allgemeines; Liquidambar orientalis / Hamamelidaceae / supercritical fluid extraction / supercritical fluid chromatography / ultraperformance convergence chromatography / styrax

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Scheuba, J. (2018). A supercritical fluid workflow for the fast separation, isolation, and quantification of major constituents in Liquidambar (styrax) resins. (Thesis). University of Vienna. Retrieved from http://othes.univie.ac.at/55566/

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Scheuba, Johanna. “A supercritical fluid workflow for the fast separation, isolation, and quantification of major constituents in Liquidambar (styrax) resins.” 2018. Thesis, University of Vienna. Accessed January 18, 2021. http://othes.univie.ac.at/55566/.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Scheuba, Johanna. “A supercritical fluid workflow for the fast separation, isolation, and quantification of major constituents in Liquidambar (styrax) resins.” 2018. Web. 18 Jan 2021.

Vancouver:

Scheuba J. A supercritical fluid workflow for the fast separation, isolation, and quantification of major constituents in Liquidambar (styrax) resins. [Internet] [Thesis]. University of Vienna; 2018. [cited 2021 Jan 18]. Available from: http://othes.univie.ac.at/55566/.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Scheuba J. A supercritical fluid workflow for the fast separation, isolation, and quantification of major constituents in Liquidambar (styrax) resins. [Thesis]. University of Vienna; 2018. Available from: http://othes.univie.ac.at/55566/

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Seton Hall University

21. Patel, Sohita. Analytical SFE: Optimization and Applications.

Degree: PhD, Chemistry and Biochemistry, 1999, Seton Hall University

URL: https://scholarship.shu.edu/dissertations/1256

. Advisors/Committee Members: Nicholas Snow PhD, Joseph T. Maloy PhD, John R. Sowa, Jr. PhD.

Subjects/Keywords: Supercritical fluid chromatography; Supercritical fluid extraction; Chemistry

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Patel, S. (1999). Analytical SFE: Optimization and Applications. (Doctoral Dissertation). Seton Hall University. Retrieved from https://scholarship.shu.edu/dissertations/1256

Chicago Manual of Style (16^th Edition):

Patel, Sohita. “Analytical SFE: Optimization and Applications.” 1999. Doctoral Dissertation, Seton Hall University. Accessed January 18, 2021. https://scholarship.shu.edu/dissertations/1256.

MLA Handbook (7^th Edition):

Patel, Sohita. “Analytical SFE: Optimization and Applications.” 1999. Web. 18 Jan 2021.

Vancouver:

Patel S. Analytical SFE: Optimization and Applications. [Internet] [Doctoral dissertation]. Seton Hall University; 1999. [cited 2021 Jan 18]. Available from: https://scholarship.shu.edu/dissertations/1256.

Council of Science Editors:

Patel S. Analytical SFE: Optimization and Applications. [Doctoral Dissertation]. Seton Hall University; 1999. Available from: https://scholarship.shu.edu/dissertations/1256

Virginia Tech

22. Yip, Shiu Hang. Supercritical Fluid Extraction and Chromatography of Various Lipids from Soybean Lecithin.

Degree: MS, Chemistry, 2007, Virginia Tech

URL: http://hdl.handle.net/10919/35349

► Phospholipids are commonly found in biological membranes. They have a polar head group and two ester linked fatty acids tails. Different methods such as thin… (more)

Subjects/Keywords: ethylpyridine phase; phospholipids; supercritical fluid extraction; supercritical fluid chromatography

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Yip, S. H. (2007). Supercritical Fluid Extraction and Chromatography of Various Lipids from Soybean Lecithin. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/35349

Chicago Manual of Style (16^th Edition):

Yip, Shiu Hang. “Supercritical Fluid Extraction and Chromatography of Various Lipids from Soybean Lecithin.” 2007. Masters Thesis, Virginia Tech. Accessed January 18, 2021. http://hdl.handle.net/10919/35349.

MLA Handbook (7^th Edition):

Yip, Shiu Hang. “Supercritical Fluid Extraction and Chromatography of Various Lipids from Soybean Lecithin.” 2007. Web. 18 Jan 2021.

Vancouver:

Yip SH. Supercritical Fluid Extraction and Chromatography of Various Lipids from Soybean Lecithin. [Internet] [Masters thesis]. Virginia Tech; 2007. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/10919/35349.

Council of Science Editors:

Yip SH. Supercritical Fluid Extraction and Chromatography of Various Lipids from Soybean Lecithin. [Masters Thesis]. Virginia Tech; 2007. Available from: http://hdl.handle.net/10919/35349

University of Utah

23. Subramanian, Murugesan. Supercritical fluid extraction of oil sand bitumens from the Uinta Basin, Utah.

Degree: PhD, Chemical and Fuels Engineering, 1996, University of Utah

URL: http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/3535/rec/2310

► The supercritical fluid extraction (SFE) of bitumens from the Whiterocks,Asphalt Ridge, PR Spring and Sunnyside oil sand deposits has beeninvestigated in a semicontinuous system. The… (more)

▼ The supercritical fluid extraction (SFE) of bitumens from the Whiterocks,Asphalt Ridge, PR Spring and Sunnyside oil sand deposits has beeninvestigated in a semicontinuous system. The extraction experiments wereconducted with the Asphalt Ridge and Sunnyside bitumens at five differentoperating conditions using commercial propane as the solvent. The resultsindicted that the cumulative extraction yields increased with an increase inpressure at constant temperature and decreased with increase in temperature atconstant pressure. The extraction yields increased with an increase in solventdensity.The composition of the feedstock was a major factor in controlling theextraction yields. The four bitumens from the Uinta Basin, Utah, variedsignificantly in their physical and chemical properties. The propane extractionyields were inversely proportional to the bitumen asphaltene content anddirectly proportional to the bitumen resin content. The cumulative extractionyields increased with an increase in bitumen volatility and saturates andaromatics contents for the Whiterocks, PR Spring and Sunnyside bitumens. Theasphaltenes appeared to concentrate in the residual fraction and were notextracted. Furthermore, they hindered the extraction of other solubility classes.The extracted phases were upgraded relative to the bitumens as indicated bytheir volatilities. The volatilities of the extract phases were considerably higherthan those of the bitumens. The fractionation of the residual fractions intosolubility fractions indicated that saturates and aromatics were preferentiallyextracted from the bitumen relative to the asphaltenes and resins. Thisphenomenon was confirmed by the reduction in the measured hydrogen/carbonratios of the residual fractions.The SFE of Asphalt Ridge and Sunnyside bitumen was modeled usingcontinuous thermodynamics principles and the Peng-Robinson equation ofstate. A process flow diagram was suggested to upgrade bitumens usingsupercritical fluid extraction and separation technology. Suitable operatingconditions such as pressure, temperature and solvent-to-feed ratio wereidentified for the proposed extraction and separation process concept. Themodeling successfully fit the experimental observations.A high temperature simulated distillation technique was developed alongwith a software to extend the ASTM D2887 and D5307 techniques to estimatethe boiling point distribution of heavy oils from 811 K to 973 K.

Subjects/Keywords: Supercritical fluid extraction; Uinta Basin; Bitumens

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Subramanian, M. (1996). Supercritical fluid extraction of oil sand bitumens from the Uinta Basin, Utah. (Doctoral Dissertation). University of Utah. Retrieved from http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/3535/rec/2310

Chicago Manual of Style (16^th Edition):

Subramanian, Murugesan. “Supercritical fluid extraction of oil sand bitumens from the Uinta Basin, Utah.” 1996. Doctoral Dissertation, University of Utah. Accessed January 18, 2021. http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/3535/rec/2310.

MLA Handbook (7^th Edition):

Subramanian, Murugesan. “Supercritical fluid extraction of oil sand bitumens from the Uinta Basin, Utah.” 1996. Web. 18 Jan 2021.

Vancouver:

Subramanian M. Supercritical fluid extraction of oil sand bitumens from the Uinta Basin, Utah. [Internet] [Doctoral dissertation]. University of Utah; 1996. [cited 2021 Jan 18]. Available from: http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/3535/rec/2310.

Council of Science Editors:

Subramanian M. Supercritical fluid extraction of oil sand bitumens from the Uinta Basin, Utah. [Doctoral Dissertation]. University of Utah; 1996. Available from: http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/3535/rec/2310

24. Silva, Dannielle Janainne da. Remoção de Bifenilas Policloradas (PCB) contidas em material sólido contaminado empregando CO₂ supercrítico: estudo experimental e modelagem termodinâmica.

Degree: PhD, Engenharia Química, 2013, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/3/3137/tde-17102014-105947/ ;

►

Bifenilas Policloradas (PCB) são compostos orgânicos clorados altamente tóxicos e também são considerados poluentes orgânicos persistentes. Sua alta estabilidade térmica e química é responsável pela… (more)

▼

Bifenilas Policloradas (PCB) são compostos orgânicos clorados altamente tóxicos e também são considerados poluentes orgânicos persistentes. Sua alta estabilidade térmica e química é responsável pela sua difícil degradação, e quando estas substâncias são liberadas no meio ambiente, sua acumulação nos ecossistemas incorpora-se na cadeia alimentar, exibindo biomagnificação. Deve-se ressaltar a importância para o meio ambiente do tratamento de resíduos com PCB. Considerando que a Convenção de Estocolmo sobre poluentes orgânicos persistentes (POP) estabeleceu a eliminação do uso de PCB em equipamentos, por exemplo, transformadores e capacitores elétricos, até 2025. O objetivo deste trabalho foi estudar a remoção de PCB pelos processos de extração usando fluido supercrítico e a extração convencional (Soxhlet) no tratamento de materiais contaminados com PCB. Assim foi desenvolvida uma ferramenta computacional para correlacionar os dados de solubilidade de PCB em CO₂ supercrítico, usando a equação de estado de Peng-Robinson com parâmetros ajustados. O procedimento de cálculo foi inicialmente usado para uma série de compostos aromáticos (naftaleno, antraceno, fenantreno e bifenil), a fim de testar a abordagem. Os parâmetros binários para a regra de mistura quadrática clássica (vdW2) foram sistematicamente estimados, juntamente com um novo conjunto de dados de pressão de vapor, a fim de descrever a dependência da temperatura e alcançar incertezas experimentais. Finalmente, foram utilizados os parâmetros estimados para simular valores de solubilidade dos principais congêneres constituintes das misturas comerciais reais de PCB, como função das condições de operação de extração com uma solução simultânea das equações de equilíbrio para cada composto. A modelagem termodinâmica demonstrou ser viável para a análise de processos.

Polychlorinated Biphenyls (PCB) are chlorinated organic compounds which are highly toxic and are also considered persistent organic pollutants. The high thermal and chemical stability of PCB are responsible for their hard degradation, and when these substances are liberated in the environment, their accumulation in ecosystems leads to their incorporation in the food chain, exhibiting biomagnification. It should be emphasized the environmental importance for treating wastes with PCB. Considering that, Stockholm Convention on persistent organic pollutants (POP) established the elimination of the use of PCB in equipments, e.g. electrical transformers and capacitors, by 2025. The objective of this work was to study the removal of PCB by the processes of extractions using supercritical fluid and conventional (Soxhlet) extraction method in the treatment of contaminated materials with PCB. As well was the formulation of a computational tool to correlate solubility data of PCB in supercritical CO₂, using Peng-Robinson equation of state with fitted parameters. The calculation procedure was initially used for a series of aromatic compounds (naphthalene, anthracene, phenanthrene and biphenyl) in order to…

Advisors/Committee Members: Nascimento, Cláudio Augusto Oller do.

Subjects/Keywords: Bifenila policlorada; Extração; Extraction; Fluido supercrítico; Modelagem; Modeling; Polychlorinated Biphenyl; Supercritical fluid; Termodinâmica; Thermodynamics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Silva, D. J. d. (2013). Remoção de Bifenilas Policloradas (PCB) contidas em material sólido contaminado empregando CO₂ supercrítico: estudo experimental e modelagem termodinâmica. (Doctoral Dissertation). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/3/3137/tde-17102014-105947/ ;

Chicago Manual of Style (16^th Edition):

Silva, Dannielle Janainne da. “Remoção de Bifenilas Policloradas (PCB) contidas em material sólido contaminado empregando CO₂ supercrítico: estudo experimental e modelagem termodinâmica.” 2013. Doctoral Dissertation, University of São Paulo. Accessed January 18, 2021. http://www.teses.usp.br/teses/disponiveis/3/3137/tde-17102014-105947/ ;.

MLA Handbook (7^th Edition):

Silva, Dannielle Janainne da. “Remoção de Bifenilas Policloradas (PCB) contidas em material sólido contaminado empregando CO₂ supercrítico: estudo experimental e modelagem termodinâmica.” 2013. Web. 18 Jan 2021.

Vancouver:

Silva DJd. Remoção de Bifenilas Policloradas (PCB) contidas em material sólido contaminado empregando CO₂ supercrítico: estudo experimental e modelagem termodinâmica. [Internet] [Doctoral dissertation]. University of São Paulo; 2013. [cited 2021 Jan 18]. Available from: http://www.teses.usp.br/teses/disponiveis/3/3137/tde-17102014-105947/ ;.

Council of Science Editors:

Silva DJd. Remoção de Bifenilas Policloradas (PCB) contidas em material sólido contaminado empregando CO₂ supercrítico: estudo experimental e modelagem termodinâmica. [Doctoral Dissertation]. University of São Paulo; 2013. Available from: http://www.teses.usp.br/teses/disponiveis/3/3137/tde-17102014-105947/ ;

University of Alberta

25. Rezaei, Karamatollah. Developing an on-line extraction-reaction process for lipids using supercritical carbon dioxide.

Degree: PhD, Department of Agricultural, Food, and Nutritional Science, 1999, University of Alberta

URL: https://era.library.ualberta.ca/files/z316q3477

Subjects/Keywords: Lipase.; Supercritical fluid extraction.; Canola oil.

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Rezaei, K. (1999). Developing an on-line extraction-reaction process for lipids using supercritical carbon dioxide. (Doctoral Dissertation). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/z316q3477

Chicago Manual of Style (16^th Edition):

Rezaei, Karamatollah. “Developing an on-line extraction-reaction process for lipids using supercritical carbon dioxide.” 1999. Doctoral Dissertation, University of Alberta. Accessed January 18, 2021. https://era.library.ualberta.ca/files/z316q3477.

MLA Handbook (7^th Edition):

Rezaei, Karamatollah. “Developing an on-line extraction-reaction process for lipids using supercritical carbon dioxide.” 1999. Web. 18 Jan 2021.

Vancouver:

Rezaei K. Developing an on-line extraction-reaction process for lipids using supercritical carbon dioxide. [Internet] [Doctoral dissertation]. University of Alberta; 1999. [cited 2021 Jan 18]. Available from: https://era.library.ualberta.ca/files/z316q3477.

Council of Science Editors:

Rezaei K. Developing an on-line extraction-reaction process for lipids using supercritical carbon dioxide. [Doctoral Dissertation]. University of Alberta; 1999. Available from: https://era.library.ualberta.ca/files/z316q3477

University of Alberta

26. Sun, Li. Ethanol and supercritical fluid extraction of Echinacea angustifolia roots.

Degree: MS, Food Science And Technology, Department of Agricultural, Food, and Nutritional Science, 2001, University of Alberta

URL: https://era.library.ualberta.ca/files/05741t80p

Subjects/Keywords: Echinacea (Plants) – Roots.; Supercritical fluid extraction.

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Sun, L. (2001). Ethanol and supercritical fluid extraction of Echinacea angustifolia roots. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/05741t80p

Chicago Manual of Style (16^th Edition):

Sun, Li. “Ethanol and supercritical fluid extraction of Echinacea angustifolia roots.” 2001. Masters Thesis, University of Alberta. Accessed January 18, 2021. https://era.library.ualberta.ca/files/05741t80p.

MLA Handbook (7^th Edition):

Sun, Li. “Ethanol and supercritical fluid extraction of Echinacea angustifolia roots.” 2001. Web. 18 Jan 2021.

Vancouver:

Sun L. Ethanol and supercritical fluid extraction of Echinacea angustifolia roots. [Internet] [Masters thesis]. University of Alberta; 2001. [cited 2021 Jan 18]. Available from: https://era.library.ualberta.ca/files/05741t80p.

Council of Science Editors:

Sun L. Ethanol and supercritical fluid extraction of Echinacea angustifolia roots. [Masters Thesis]. University of Alberta; 2001. Available from: https://era.library.ualberta.ca/files/05741t80p

Universidade Estadual de Campinas

27. Freitas-Blanco, Veronica Santana de, 1983-. Extração de espilantol no contexto da química verde e sua aplicação no tratamento da mucosite oral: Extraction of spilanthol in the context of green chemistry and its application in the treatment of oral mucositis.

Degree: 2018, Universidade Estadual de Campinas

URL: http://repositorio.unicamp.br/jspui/handle/REPOSIP/331473

► Abstract: The extraction of bioactive compounds from plants is usually associated with the use of toxic organic solvents, which, as a consequence, generate waste with… (more)

▼ Abstract: The extraction of bioactive compounds from plants is usually associated with the use of toxic organic solvents, which, as a consequence, generate waste with high environmental impact and high operating costs. For this reason, the use of processes that eliminate or minimize the use of organic solvents, such as supercritical fluid extraction using CO2, is of great interest. Spilanthol, an alkylamide found in various species, among them, Acmella oleracea (L.) R.K. Jansen has several pharmacological properties, such as anti-inflammatory, anesthetic, and antioxidant activity. These properties may be of great interest for the treatment of oral mucositis, one of the most common side effects from the treatment of cancer patients undergoing radiotherapy and chemotherapy. Therefore, the purpose of this work was to isolate the spilanthol contained in the aerial parts of Acmella oleracea employing green chemistry techniques and evaluate its anti-inflammatory activity through in vitro and in vivo models, as well as, the incorporation of spilanthol in an oral formulation aimed to treat of oral mucositis. It was possible to obtain high purity (97%) spilanthol employing green extraction techniques, such as extraction followed by fractionation using supercritical carbon dioxide, with subsequent isolation of the spilanthol by Flash chromatography, using as solvents, ethanol, and water. In the in vitro evaluation, it was possible to determine the low toxicity of spilanthol to human gingival fibroblasts (HGF-1) in concentrations of up to 200 ?M, and also its suppressor effect in the expression of genes involved in the inflammatory process, such as Selectin E and Interleukin-9. In the in vivo experiment, spilanthol, at 30 mg/kg, was able to significantly attenuate the inflammation caused by 5-FU chemotherapy in a model of intestinal mucositis in Swiss mice. It was also possible to develop a promising formulation containing spilanthol for a possible use in mucositis Advisors/Committee Members: UNIVERSIDADE ESTADUAL DE CAMPINAS (CRUESP), Rodrigues, Rodney Alexandre Ferreira, 1964- (advisor), Universidade Estadual de Campinas. Faculdade de Odontologia de Piracicaba (institution), Programa de Pós-Graduação em Odontologia (nameofprogram), Alencar, Severino Matias de (committee member), Gaspi, Fernanda Oliveira de Gaspari de (committee member), Volpato, Maria Cristina (committee member), Franz-Montan, Michelle (committee member).

Subjects/Keywords: Espilantol; Mucosite; Química verde; Extração com fluído supercrítico; Spilanthol; Mucositis; Green chemistry; Supercritical fluid extraction

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Freitas-Blanco, Veronica Santana de, 1. (2018). Extração de espilantol no contexto da química verde e sua aplicação no tratamento da mucosite oral: Extraction of spilanthol in the context of green chemistry and its application in the treatment of oral mucositis. (Thesis). Universidade Estadual de Campinas. Retrieved from http://repositorio.unicamp.br/jspui/handle/REPOSIP/331473

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Freitas-Blanco, Veronica Santana de, 1983-. “Extração de espilantol no contexto da química verde e sua aplicação no tratamento da mucosite oral: Extraction of spilanthol in the context of green chemistry and its application in the treatment of oral mucositis.” 2018. Thesis, Universidade Estadual de Campinas. Accessed January 18, 2021. http://repositorio.unicamp.br/jspui/handle/REPOSIP/331473.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Freitas-Blanco, Veronica Santana de, 1983-. “Extração de espilantol no contexto da química verde e sua aplicação no tratamento da mucosite oral: Extraction of spilanthol in the context of green chemistry and its application in the treatment of oral mucositis.” 2018. Web. 18 Jan 2021.

Vancouver:

Freitas-Blanco, Veronica Santana de 1. Extração de espilantol no contexto da química verde e sua aplicação no tratamento da mucosite oral: Extraction of spilanthol in the context of green chemistry and its application in the treatment of oral mucositis. [Internet] [Thesis]. Universidade Estadual de Campinas; 2018. [cited 2021 Jan 18]. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/331473.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Freitas-Blanco, Veronica Santana de 1. Extração de espilantol no contexto da química verde e sua aplicação no tratamento da mucosite oral: Extraction of spilanthol in the context of green chemistry and its application in the treatment of oral mucositis. [Thesis]. Universidade Estadual de Campinas; 2018. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/331473

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

28. Johner Flores, Júlio Cezar, 1987-. Montagem de um equipamento de extração e fracionamento com fluido supercrítico assistida por prensagem : adaptações e validação utilizando diferentes matrizes vegetais: Assembly of an equipment for extraction and fractionation with supercritical fluid assisted by pressing : adaptations and validation using different vegetable matrices.

Degree: 2018, Universidade Estadual de Campinas

URL: http://repositorio.unicamp.br/jspui/handle/REPOSIP/331555

► Abstract: This work presents the restructuring of a low cost laboratory scale unit developed from the supercritical fluid extraction equipment set forth in the CNPq/DLR… (more)

▼ Abstract: This work presents the restructuring of a low cost laboratory scale unit developed from the supercritical fluid extraction equipment set forth in the CNPq/DLR 910016/99-2 (Germany) agreement. Among the stages developed, includes a cost survey to compare value of a home unit over that of the commercial units, validation of the assembled equipment and the development of a supercritical fluid extraction process assisted by pressing. To validate the extractor, two attached separators and other parts of the unit, the extraction of annatto seeds and the extraction and fractionation of fennel oil were carried out using supercritical carbon dioxide as solvent. The chemical composition of the resulting products was evaluated in terms of qualitative approach using thin layer chromatography. Images of the chromatographic plates were analyzed using a free software called ImageJ, which proved to be a low cost tool for an evaluation of the chemical profile of the extracts. It was verified that the curves of annatto extraction were in good agreement with those obtained in the literature (3.8% of oil). Using Assembled Equipment (Named SFE-0.1L), the fennel extracts were successfully fractionated into two different oils collected in the separators of the equipment. The separators were validated by fractionation of the fennel seed extract, the essential oil was produced in the second separator, and the lipid fraction in the first separator. The cost of assembling home-made equipment was less than US$ 17,000. Elsewhere in this thesis, high-pressure phase behavior experiments were applied to fractionated extracts using a synthetic-visual apparatus. The results indicate that the annatto extracts were divided in terms of visual aspects and differences in the chemical profile. The chemical composition obtained indicates that the extracts of annatto present relevant profiles of terpenes and phenolics. The tests with the extracts revealed similar vapor-liquid and vapor-liquid-liquid equilibrium phase for the compositions studied. In the last part of this thesis, a new extraction technique was developed by integrating SFE and pressing. This new technique, which is called SFEAP ¿ Supercritical Fluid Extraction Assisted by Pressing, was used for extraction of dried and crushed pequi pulp. The SFEAP technique resulted in an extract mass eight times higher than the SFE during the first minute of extraction, which corresponded to an increase of yield of 18.2g/100g of raw material. To conclude, the SFE-0.1L unit can be effectively used for extraction processes (supercritical CO2, ethanol, water as solvents), fractionation and pressing with or without solvent, and the results can be used as a reliable reference in the construction of units SFE in pilot and industrial scales Advisors/Committee Members: UNIVERSIDADE ESTADUAL DE CAMPINAS (CRUESP), Universidade Estadual de Campinas. Faculdade de Engenharia de Alimentos (institution), Programa de Pós-Graduação em Engenharia de Alimentos (nameofprogram), Petenate, Maria Angela de Almeida Meireles (committee member), Oliveira, Alessandra Lopes de (committee member), Maximo, Guilherme José (committee member), Mendes, Luiz Fernando (committee member), Guirardello, Reginaldo (committee member).

Subjects/Keywords: Fracionamento; Pequi; Prensagem a frio; Extração supercritico; Fractionation; Pequi; Pressing; Supercritical fluid extraction

10 more images…

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Johner Flores, Júlio Cezar, 1. (2018). Montagem de um equipamento de extração e fracionamento com fluido supercrítico assistida por prensagem : adaptações e validação utilizando diferentes matrizes vegetais: Assembly of an equipment for extraction and fractionation with supercritical fluid assisted by pressing : adaptations and validation using different vegetable matrices. (Thesis). Universidade Estadual de Campinas. Retrieved from http://repositorio.unicamp.br/jspui/handle/REPOSIP/331555

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Johner Flores, Júlio Cezar, 1987-. “Montagem de um equipamento de extração e fracionamento com fluido supercrítico assistida por prensagem : adaptações e validação utilizando diferentes matrizes vegetais: Assembly of an equipment for extraction and fractionation with supercritical fluid assisted by pressing : adaptations and validation using different vegetable matrices.” 2018. Thesis, Universidade Estadual de Campinas. Accessed January 18, 2021. http://repositorio.unicamp.br/jspui/handle/REPOSIP/331555.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Johner Flores, Júlio Cezar, 1987-. “Montagem de um equipamento de extração e fracionamento com fluido supercrítico assistida por prensagem : adaptações e validação utilizando diferentes matrizes vegetais: Assembly of an equipment for extraction and fractionation with supercritical fluid assisted by pressing : adaptations and validation using different vegetable matrices.” 2018. Web. 18 Jan 2021.

Vancouver:

Johner Flores, Júlio Cezar 1. Montagem de um equipamento de extração e fracionamento com fluido supercrítico assistida por prensagem : adaptações e validação utilizando diferentes matrizes vegetais: Assembly of an equipment for extraction and fractionation with supercritical fluid assisted by pressing : adaptations and validation using different vegetable matrices. [Internet] [Thesis]. Universidade Estadual de Campinas; 2018. [cited 2021 Jan 18]. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/331555.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Johner Flores, Júlio Cezar 1. Montagem de um equipamento de extração e fracionamento com fluido supercrítico assistida por prensagem : adaptações e validação utilizando diferentes matrizes vegetais: Assembly of an equipment for extraction and fractionation with supercritical fluid assisted by pressing : adaptations and validation using different vegetable matrices. [Thesis]. Universidade Estadual de Campinas; 2018. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/331555

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidade Estadual de Campinas

29. Cavalcanti, Rodrigo Nunes. Extração de antocianinas de resíduo de jabuticaba (Myrciaria cauliflora) utilizando líquido pressurizado e fluido supercrítico : caracterização química, avaliação econômica e modelagem matemática: Obtaining of extract from amazon oil matrix via supercritical technology : chemical characterization, economic evaluation and mathematical modeling.

Degree: 2013, Universidade Estadual de Campinas

URL: http://repositorio.unicamp.br/jspui/handle/REPOSIP/254864

► Abstract: Currently, scientific knowledge about the use of natural products with functional properties, the consumer demand for quality food, as well as legislative action to… (more)

▼ Abstract: Currently, scientific knowledge about the use of natural products with functional properties, the consumer demand for quality food, as well as legislative action to reduce the use of chemically synthesized colorants have prompted an increasing use of natural colorants. Among these, anthocyanin are water-soluble pigments responsible for main colors found in nature ranging from orange, through red and violet to blue. Anthocyanins are polar molecules derived from the flavilium cation (C6-C3-C6) constituting an important subgroup of flavonoids. The main biological properties of anthocyanins are activity: anti-inflammatory, anticarcinogenic and antioxidant. Several extraction methods have been used to obtain anthocyanins. Supercritical fluid extraction has considerable advantages over conventional methods: the solvent is easily removed from the solute; uses little or no organic solvent, enables a rapid extraction and, finally, operates at low temperatures favoring the extraction of volatile and thermolabile compounds. This work aims to study the process of supercritical extraction of anthocyanins optimizing the various steps of the process through experimental testing, simulation and comparison with other(s) extraction method(s). Initially it was made the characterization of raw material which showed high levels of protein, carbohydrates and fiber. The extractions were carried out via SFE and PLE using ethanol, isopropanol and water as co-solvent and solvent, respectively. The extracts composition was evaluated by spectrophotometry showing high levels of phenolics, flavonoids, anthocyanins and antioxidant activity (%AA) with respect to the literature data. The highest phenolics and flavonoids content and %AA were obtained by SFE using alcohols as co-solvent. On the other hand, anthocyanins content achieve the best results using water and alcohols as a solvent and co-solvents, respectively. According to payback time and cost of manufacturing results both extraction methods were economic feasible to the production of crude extract from jabuticaba byproduct. The higher the extraction yield and extraction vessel capacity the lower the cost of manufacturing. The study of the kinetic parameters shows the best results were achieved at higher solvent mass flow for both extraction methods Advisors/Committee Members: UNIVERSIDADE ESTADUAL DE CAMPINAS (CRUESP), Petenate, Maria Angela de Almeida Meireles, 1953- (advisor), Meireles, Maria Angela de Almeida, 1953- (advisor), Universidade Estadual de Campinas. Faculdade de Engenharia de Alimentos (institution), Programa de Pós-Graduação em Engenharia de Alimentos (nameofprogram), Cruz, Adriano Gomes da (committee member), Gonçalves, Cintia Bernardo (committee member), Faria, Gislaine Chrystina Nogueira de (committee member), Mazutti, Marcio Antonio (committee member).

Subjects/Keywords: Antocianina; Jabuticaba; Resíduos; Fluido supercritico; Anthocyanins; Jaboticaba; Byproduct; Supercritical fluid; Pressurized liquid extraction

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Cavalcanti, R. N. (2013). Extração de antocianinas de resíduo de jabuticaba (Myrciaria cauliflora) utilizando líquido pressurizado e fluido supercrítico : caracterização química, avaliação econômica e modelagem matemática: Obtaining of extract from amazon oil matrix via supercritical technology : chemical characterization, economic evaluation and mathematical modeling. (Thesis). Universidade Estadual de Campinas. Retrieved from http://repositorio.unicamp.br/jspui/handle/REPOSIP/254864

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Cavalcanti, Rodrigo Nunes. “Extração de antocianinas de resíduo de jabuticaba (Myrciaria cauliflora) utilizando líquido pressurizado e fluido supercrítico : caracterização química, avaliação econômica e modelagem matemática: Obtaining of extract from amazon oil matrix via supercritical technology : chemical characterization, economic evaluation and mathematical modeling.” 2013. Thesis, Universidade Estadual de Campinas. Accessed January 18, 2021. http://repositorio.unicamp.br/jspui/handle/REPOSIP/254864.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Cavalcanti, Rodrigo Nunes. “Extração de antocianinas de resíduo de jabuticaba (Myrciaria cauliflora) utilizando líquido pressurizado e fluido supercrítico : caracterização química, avaliação econômica e modelagem matemática: Obtaining of extract from amazon oil matrix via supercritical technology : chemical characterization, economic evaluation and mathematical modeling.” 2013. Web. 18 Jan 2021.

Vancouver:

Cavalcanti RN. Extração de antocianinas de resíduo de jabuticaba (Myrciaria cauliflora) utilizando líquido pressurizado e fluido supercrítico : caracterização química, avaliação econômica e modelagem matemática: Obtaining of extract from amazon oil matrix via supercritical technology : chemical characterization, economic evaluation and mathematical modeling. [Internet] [Thesis]. Universidade Estadual de Campinas; 2013. [cited 2021 Jan 18]. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/254864.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Cavalcanti RN. Extração de antocianinas de resíduo de jabuticaba (Myrciaria cauliflora) utilizando líquido pressurizado e fluido supercrítico : caracterização química, avaliação econômica e modelagem matemática: Obtaining of extract from amazon oil matrix via supercritical technology : chemical characterization, economic evaluation and mathematical modeling. [Thesis]. Universidade Estadual de Campinas; 2013. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/254864

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

30. Lombard, James Edward. Thermodynamic modelling of hydrocarbon-chains and light-weight supercritical solvents.

Degree: MEng, Process Engineering, 2015, Stellenbosch University

URL: http://hdl.handle.net/10019.1/96844

► ENGLISH ABSTRACT: Long-chain hydrocarbons are of value to numerous lucrative industries. Due to the low volatility and close melting and boiling points of these solutes,… (more)

▼ ENGLISH ABSTRACT: Long-chain hydrocarbons are of value to numerous lucrative industries. Due to the low volatility and close melting and boiling points of these solutes, traditional fractionation methods lack the required selectivity for separation and cause thermal degradation of the product. This project investigates the feasibility of Supercritical Fluid Extraction (SFE) for processing these systems, with the primary objective of modelling the high-pressure vapour-liquid equilibrium (VLE) properties of hydrocarbon solutes with a light-weight solvent using a semiempirical equation of state (EOS). Pure component vapour pressures and saturated liquid volumes are also investigated. A thorough investigation into the phase behaviour of the n-alkanes, 1-alcohols, carboxylic acids and esters in light weight supercritical solvents CO2, ethane and propane revealed that the solute structure and temperature largely influence the solute solubility and process feasibility. Good selectivity amongst the various solutes was observed for all three solvents, but very high pressures were required for complete miscibility using CO2 (exceeding 30 MPa). The quadrapole moment of CO2 further leads to complexities in phase behaviour such as temperature and density inversions (CO2/alkanes and CO2/alcohols) and 3-phase regions within the operating range. Simple linear trends in pressure vs. carbon number and temperature were observed for all the considered series using ethane and propane and these solvents were thus selected for conducting the modelling for this study. A thorough review of semi-emperical EOS models from literature revealed that the simple cubic equations of state (CEOSs) provide a promising modelling approach for SFE applications due to their simplicity, flexibility and reliability. The simple Peng-Robinson (PR) and Soave-Redlich-Kwong (SRK) EOSs provide good correlation of vapour pressure (%AAD below 5 %) for all the series over a large carbon number range (up to nC20), provided a two parameter alpha function is used. A 3rd parameter in the volume dependence for Patel-Teja (PT) EOS provides considerable improvement over the PR and SRK EOSs for satureate liquid volume correlations of the non-polar solutes (alkanes and esters), but offers virtually no advantage for the more polar alcohols and acids. The CEOSs therefore suffer clear limitations in simultaneous representation of these saturation properties (vapour pressure and liquid molar volume) for the systems of interest. Good correlations of high pressure binary VLE data were obtained using CEOSs available in the Aspen Plus ® simulator (% AAD in P, T and X2 generally below 1 % and ranging from 4 to 12 % for Y2 for all series) provided that two binary interaction parameters (BIPs) are used in the model mixing rules, irrespective of the model used. Aspen Plus ® was further validated as a reliable thermodynamic tool by comparing model fits using the RK-ASPEN model with parameters obtained from the Aspen Plus ® data regression routine and… Advisors/Committee Members: Knoetze, J. H., Schwarz, C. E., Stellenbosch University. Faculty of Engineering. Dept. of Process Engineering..

Subjects/Keywords: Supercritical fluid extraction; Vapour-liquid equilibrium (VLE) – Modelling; Equation of state (EOS); UCTD

11 more images…

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Lombard, J. E. (2015). Thermodynamic modelling of hydrocarbon-chains and light-weight supercritical solvents. (Thesis). Stellenbosch University. Retrieved from http://hdl.handle.net/10019.1/96844

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lombard, James Edward. “Thermodynamic modelling of hydrocarbon-chains and light-weight supercritical solvents.” 2015. Thesis, Stellenbosch University. Accessed January 18, 2021. http://hdl.handle.net/10019.1/96844.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lombard, James Edward. “Thermodynamic modelling of hydrocarbon-chains and light-weight supercritical solvents.” 2015. Web. 18 Jan 2021.

Vancouver:

Lombard JE. Thermodynamic modelling of hydrocarbon-chains and light-weight supercritical solvents. [Internet] [Thesis]. Stellenbosch University; 2015. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/10019.1/96844.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lombard JE. Thermodynamic modelling of hydrocarbon-chains and light-weight supercritical solvents. [Thesis]. Stellenbosch University; 2015. Available from: http://hdl.handle.net/10019.1/96844

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Open Access Theses and Dissertations