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You searched for subject:(CO2 Filtration). Showing records 1 – 3 of 3 total matches.

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Michigan Technological University

1. Haselhuhn, Howard J. The Role of Water Chemistry in the Concentration of Hematite Ore.

Degree: MS, Department of Chemical Engineering, 2013, Michigan Technological University

Selective flocculation and dispersion processes rely on differences in the surface chemistry of fine mineral particles (<25 >ìm) to allow for the concentration of specific minerals from an ore body. The effectiveness of selective flocculation and dispersion processes for the concentration of hematite (Fe2O3) ore are strongly dependent on the ionic content of the process water. The goal of this research was to analyze the ionic content of an operating selective flocculation and dispersion type hematite ore concentrator and determine how carbon dioxide affects the filtration of the final product. A detailed water chemistry analysis of the entire process was determined to show concentration profiles throughout the process. This information was used to explain process phenomena and promote future research into this subject. A subsequent laboratory study was conducted to show how carbon dioxide affects filtration rate and relate this effect to the zeta potential of the constituents of the concentrated hematite ore. Advisors/Committee Members: Surendra K Kawatra.

Subjects/Keywords: CO2. Filtration; Hematite; Iron Ore; Water Chemistry; Chemical Engineering; Mining Engineering

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

APA (6th Edition):

Haselhuhn, H. J. (2013). The Role of Water Chemistry in the Concentration of Hematite Ore. (Masters Thesis). Michigan Technological University. Retrieved from https://digitalcommons.mtu.edu/etd-restricted/101

Chicago Manual of Style (16th Edition):

Haselhuhn, Howard J. “The Role of Water Chemistry in the Concentration of Hematite Ore.” 2013. Masters Thesis, Michigan Technological University. Accessed January 21, 2021. https://digitalcommons.mtu.edu/etd-restricted/101.

MLA Handbook (7th Edition):

Haselhuhn, Howard J. “The Role of Water Chemistry in the Concentration of Hematite Ore.” 2013. Web. 21 Jan 2021.

Vancouver:

Haselhuhn HJ. The Role of Water Chemistry in the Concentration of Hematite Ore. [Internet] [Masters thesis]. Michigan Technological University; 2013. [cited 2021 Jan 21]. Available from: https://digitalcommons.mtu.edu/etd-restricted/101.

Council of Science Editors:

Haselhuhn HJ. The Role of Water Chemistry in the Concentration of Hematite Ore. [Masters Thesis]. Michigan Technological University; 2013. Available from: https://digitalcommons.mtu.edu/etd-restricted/101

2. Amanda Rafaele Serpa Camelo. CombustÃo do BiogÃs e do GÃs Natural com Elevadas ConcentraÃÃes de H2S e CO2 em Caldeira de Queimador Poroso.

Degree: Master, 2012, Universidade Federal do Ceará

O aproveitamento do biogÃs e do gÃs natural (GN) com elevadas concentraÃÃes de diÃxido de carbono (CO2) e de sulfeto de hidrogÃnio (H2S), atravÃs de sistemas tÃrmicos de combustÃo convencionais, pode resultar em instabilidade de reaÃÃo ou, atÃ, apagamento da frente de chama, sob risco de avarias irreversÃveis para estrutura fÃsica dos equipamentos, devido aos Ãcidos corrosivos decorrentes da reaÃÃo. Ainda, altas concentraÃÃes desses contaminantes favorecem a ocorrÃncia de elevados Ãndices de gases poluentes nos produtos, a exemplo de monÃxido de carbono (CO) e hidrocarbonetos nÃo queimados (HC), dentre outros. Por essa razÃo, um estudo experimental foi realizado com base na aplicaÃÃo de uma tecnologia de combustÃo nÃo-convencional, a CombustÃo de FiltraÃÃo, a fim de lidar com esses combustÃveis de baixa qualidade. O aparato experimental empregado nessa pesquisa consiste de uma caldeira porosa de escoamento recÃproco, em que seu queimador à preenchido completamente por esferas cerÃmicas de alumina (Al2O3), formando uma matriz porosa inerte, que envolve os trocadores de calor da caldeira. O processo de queima de ambos os combustÃveis foi investigado sob condiÃÃes extremas de operaÃÃo, em termos de misturas ar-combustÃvel ultra-pobres. Como suporte para interpretaÃÃo dos fenÃmenos do processo, foi aplicado um modelo numÃrico de simulaÃÃo, que considera o mecanismo de oxidaÃÃo do metano em um meio poroso, adaptado para identificar os efeitos quÃmicos de uma alta concentraÃÃo de CO2 sobre a reaÃÃo. A influÃncia dos principais parÃmetros de operaÃÃo, razÃo de equivalÃncia e velocidade da mistura ar-combustÃvel, sob os produtos de combustÃo e sob a instabilidade de reaÃÃo foi estudada teÃrica e experimentalmente. Os resultados mostram excelente estabilidade operacional da caldeira com emissÃes ultra-baixas de CO e NOx, inferiores a 1 ppm para razÃes de equivalÃncia menores que 0,6, e com eficiÃncia de queima do H2S de mais de 99%.

The use of biogas and natural gas (GN) with high concentrations of carbon dioxide (CO2) and hydrogen sulfide (H2S) through conventional combustion thermal systems can result in reaction instability or flame front quenching, under risk of irreversible damages to the physical structure of a piece of equipments, due to corrosive acids remaining from reaction. Furthermore, high concentrations of these contaminants favor the occurrence of high pollutant levels in the products, like carbon monoxide (CO) and unburned hydrocarbon (HC), among others. Therefore, an experimental study was performed with basis on the application of a non conventional combustion technology, Filtration Combustion, in order to deal with these low-quality fuels. The experimental apparatus employed in this research consists of a reciprocal flow porous boiler, in which its burner is completely filled by ceramic spheres of alumina (Al2O3), forming an inert porous matrix, which involves boilerâs heat exchangers. The burning process of both the fuels was investigated under extreme operation conditions, in terms of ultra-lean…

Advisors/Committee Members: William MagalhÃes Barcellos, Edson Bazzo, Silvia Azucena Nebra de PÃrez.

Subjects/Keywords: BiogÃs - CombustÃo; ENGENHARIA MECANICA; ultra-low CO and NOx emissions; filtration combustion; NG and biogas with H2S and CO2; GÃs natural

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APA (6th Edition):

Camelo, A. R. S. (2012). CombustÃo do BiogÃs e do GÃs Natural com Elevadas ConcentraÃÃes de H2S e CO2 em Caldeira de Queimador Poroso. (Masters Thesis). Universidade Federal do Ceará. Retrieved from http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=7873 ;

Chicago Manual of Style (16th Edition):

Camelo, Amanda Rafaele Serpa. “CombustÃo do BiogÃs e do GÃs Natural com Elevadas ConcentraÃÃes de H2S e CO2 em Caldeira de Queimador Poroso.” 2012. Masters Thesis, Universidade Federal do Ceará. Accessed January 21, 2021. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=7873 ;.

MLA Handbook (7th Edition):

Camelo, Amanda Rafaele Serpa. “CombustÃo do BiogÃs e do GÃs Natural com Elevadas ConcentraÃÃes de H2S e CO2 em Caldeira de Queimador Poroso.” 2012. Web. 21 Jan 2021.

Vancouver:

Camelo ARS. CombustÃo do BiogÃs e do GÃs Natural com Elevadas ConcentraÃÃes de H2S e CO2 em Caldeira de Queimador Poroso. [Internet] [Masters thesis]. Universidade Federal do Ceará 2012. [cited 2021 Jan 21]. Available from: http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=7873 ;.

Council of Science Editors:

Camelo ARS. CombustÃo do BiogÃs e do GÃs Natural com Elevadas ConcentraÃÃes de H2S e CO2 em Caldeira de Queimador Poroso. [Masters Thesis]. Universidade Federal do Ceará 2012. Available from: http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=7873 ;


Texas A&M University

3. Alfi, Masoud. Multi Porosity Models in Shales: Flow Behavior and Improved Recovery.

Degree: PhD, Petroleum Engineering, 2018, Texas A&M University

The first part of this work proposes a partitioning scheme to divide porous media in shale into three different sub-media (porosity systems) with distinctive characteristics: inorganic matter and kerogen (in the shale matrix), along with fracture network (natural or hydraulic). This partitioning scheme is then deployed on a micro-scale model, which gives us the capability of analyzing the complex nature of mass transfer in shale. Current model can also handle various flow and storage mechanisms related with hydrocarbon production in shale such as molecule/wall interactions and slippage of the gas phase, multicomponent desorption, and capillarities. Although kerogen is considered to be a rich source of hydrocarbon, a relatively high capillary pressure and very low rock permeability hinder oil production in organic-rich shale. Such problems may be alleviated by employing appropriate production enhancement techniques, e.g. CO₂ EOR, compatible with the ultra-light nature of such reservoirs. In the second part of this dissertation, we propose a model to account for different pore sizes in shale and its influence on hydrocarbon distribution. Such a partitioning scheme provides a multiporosity-like approach where the fluid composition in different pore sizes varies due to size filtration and sieving effect. The proposed approach opens up new ways to interpret anomalous gas-oil ratios in shale. Recent advances in shale reservoirs spans a wide range. Molecules in pores with different sizes may exhibit significantly different thermodynamics behavior. Rock fluid interactions and space hindrance effects play an important role when pore sizes become close to species’ molecular diameters. The tight porous media in such situations can act as a semi-permeable membrane that selectively filters molecules on their sizes. This effect can result in a composition difference between pores with large and small diameters in shale reservoirs (size filtration or sieving effect), with small pores mostly filled with smaller hydrocarbon molecules and large molecules residing in larger pores. To account for such a diverse behavior, this study proposes a pore partitioning approach, which divides shale media into two different porosity systems: large and small pores. Our thermodynamics calculations show that as pore diameter decreases, the concentration of larger hydrocarbon molecules in those pores decreases because of size filtration. The so-called sieving effect is believed to be responsible for the anomalous production behavior (lower-than-expected or constant gas-oil ratios for extended production periods). Considering the small pore size in shale and rock-fluid interactions, our current model was used to analyze the potential of different injection gases as improve recover agents. Our results show that a higher pore wall affinity for CO₂ (compared to CH₄ and N₂) helps it reach deeper in small shale pores, making it a perfect fit to improve oil recovery from extremely tight media. Results show that our model provides a powerful tool to… Advisors/Committee Members: Barrufet, Maria A (advisor), Killough, John E (advisor), Mannan, Mahboobul (committee member), Akkutlu, Ibrahim (committee member).

Subjects/Keywords: multiple porosity; shale; flow simulation; diffusion and adsorption; size filtration and sieving; improve recovery; CO2 injection

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

APA (6th Edition):

Alfi, M. (2018). Multi Porosity Models in Shales: Flow Behavior and Improved Recovery. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/173297

Chicago Manual of Style (16th Edition):

Alfi, Masoud. “Multi Porosity Models in Shales: Flow Behavior and Improved Recovery.” 2018. Doctoral Dissertation, Texas A&M University. Accessed January 21, 2021. http://hdl.handle.net/1969.1/173297.

MLA Handbook (7th Edition):

Alfi, Masoud. “Multi Porosity Models in Shales: Flow Behavior and Improved Recovery.” 2018. Web. 21 Jan 2021.

Vancouver:

Alfi M. Multi Porosity Models in Shales: Flow Behavior and Improved Recovery. [Internet] [Doctoral dissertation]. Texas A&M University; 2018. [cited 2021 Jan 21]. Available from: http://hdl.handle.net/1969.1/173297.

Council of Science Editors:

Alfi M. Multi Porosity Models in Shales: Flow Behavior and Improved Recovery. [Doctoral Dissertation]. Texas A&M University; 2018. Available from: http://hdl.handle.net/1969.1/173297

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