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You searched for +publisher:"NSYSU" +contributor:("Chung-Hsuan Hung"). Showing records 1 – 3 of 3 total matches.

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NSYSU

1. Lin, Chih-Feng. Removal of Ash from Waste-Tire Pyrolytic Char by the Principle of Electrostatic Separation.

Degree: Master, Environmental Engineering, 2008, NSYSU

Pyrolysis has been a useful procedure to treat waste-tire, which decomposes waste-tire at high temperature in the absence of oxygen. This thermal decomposition process generates pyrolysis oil, combustible gas, and char, which distribute in liquid phase, gas phase, and solid phase, respectively. Pyrolysis oil and combustible gas are fuels, while char is composed of carbon black and ash. Thus, char would be economically worth while to be treated before reuse. In this study, based on the resistivity difference between carbon black and ash, ash can be removed from char in the principle of electrostatic separation and thus increase the value of char. In this study, the objective was to separate ash from char by electrostatic separation process, different char including waste-tire pyrolytic char (raw char), low pressure re-pyrolytic char, ZnO-added char (12% ZnO mixed with 600 °C re-pyrolytic cahr) and man-made char (N600 carbon black mixed with 14.5% metallic oxide) were tested. The Electro-Static Separator (ESS) was designed and constructed with two types of discharge electrodes including a needle-plate electrode (NPE) and a needle-bar electrode (NBE) and two kinds of dust feeders to generate either fine or coarse particles. The results indicated that raw char had higher collection efficiency using the NBE system than the NPE system in the operating voltages of -7 kV to -15 kV because the surface area of the NBE system was less than the NPE system, thus led higher surface charge density for the NBE system than the NPE system, resulting in higher discharge current of the NBE system. In order to lower resistivity and reduce deposited pyrolysis oil on char, low pressure repyrolysis process was used. Because the removal efficiency of pyrolysis oil is proportional to repyrolysis temperature, more pyrolysis oil can be removed from the surface of char, resulting in more carbon blacks exposed on the char surface as conductive material. Thus, the collection efficiency of 600 °C repyrolytic char was less than that of 400 °C repyrolytic char. Furthermore, because particle charging quantity was proportional to particle size, fine char particles had less collection efficiency than coarse char particles. However, both raw char and repyrolytic char, the collection efficiency of carbon and ash had similar trends, suggesting that similar percentage of carbon and ash were collected on the plate and penetrated the ESS system. Therefore, the separation efficiency of carbon and ash were similar, same situation was observed for the ZnO-added char. In order to verify the feasibility of carbon and ash separation by electrostatic separation process, N660 carbon black mixing with 14.5% man-made ash (Al2O3, ZnO and CaO composed) to simulate man-made char, which was further used to proceed the electrostatic separation experiments in this study. The results indicated that the collection efficiency of man-made char increased with operating voltage, and the ash content seems to increase with voltage. Carbon black is a low resistivity material, which… Advisors/Committee Members: Chih-Chieh Chen (chair), Chung-Shin Yuan (committee member), Wen-Yin Lin (chair), Chung-Hsuan Hung (chair).

Subjects/Keywords: principle of electrostatic separation; ash content; char; carbon black; non-linear regression; pyrolysis

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

APA (6th Edition):

Lin, C. (2008). Removal of Ash from Waste-Tire Pyrolytic Char by the Principle of Electrostatic Separation. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0706108-185149

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

Chicago Manual of Style (16th Edition):

Lin, Chih-Feng. “Removal of Ash from Waste-Tire Pyrolytic Char by the Principle of Electrostatic Separation.” 2008. Thesis, NSYSU. Accessed July 09, 2020. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0706108-185149.

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

MLA Handbook (7th Edition):

Lin, Chih-Feng. “Removal of Ash from Waste-Tire Pyrolytic Char by the Principle of Electrostatic Separation.” 2008. Web. 09 Jul 2020.

Vancouver:

Lin C. Removal of Ash from Waste-Tire Pyrolytic Char by the Principle of Electrostatic Separation. [Internet] [Thesis]. NSYSU; 2008. [cited 2020 Jul 09]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0706108-185149.

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

Council of Science Editors:

Lin C. Removal of Ash from Waste-Tire Pyrolytic Char by the Principle of Electrostatic Separation. [Thesis]. NSYSU; 2008. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0706108-185149

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


NSYSU

2. Chuang, Hsueh-Lung. Spatiotemporal Variation, Chemical Fingerprint, and Source Identification of Atmospheric Fine Particles Long-range Transported toward the Intersectional Region of Taiwan Strait and South China Sea.

Degree: Master, Environmental Engineering, 2016, NSYSU

The deterioration of ambient air quality across the Taiwan strait, including Chinese haze, Asian duststorms and Indochina biomass burning, is highly correlated with industrial emissions, natural soil weathering and swidden agriculture. Under certain meteorological conditions, air pollutants could be blown to the downwind countries/regions and cause poor ambient air quality. Previous literature reported that the northern prevailing winds commonly blow the haze originated from northern China to central and southern China, Taiwan, and even Dongsha Islands. Therefore, the intersectional region of Taiwan Strait and South China Sea is an important air quality monitoring site for long-range transportation. This study selected two PM2.5 sampling sites (i.e. Penghu Islands and Dongsha Islands) located at the intersectional region of Taiwan Strait and South China Sea. Twenty-four hour sampling of PM2.5 was simultaneously collected at Penghu Islands and Dongsha Islands for continuous 14 days in four seasons from summer 2015 to spring 2016. PM2.5 samples were simultaneously collected with BGI-PQ200. After sampling, PM2.5 samples were carried back to the laboratory for conditioning, weighing, and chemical analysis. The chemical composition of PM2.5 including water-soluble ionic species, metallic elements, carbonaceous contents, and anhydrosugar. Moreover, the potential sources of PM2.5 and their contribution were further identified by principal component analysis (PCA) and chemical mass balance (CMB) receptor model. Field sampling results indicated that the spatial distribution of PM2.5 concentration increased from south to north. The lowest seasonal averaged PM2.5 concentrations were observed in summer at both Penghu Islands and Dongsha Islands. PM2.5 concentrations increased gradually since fall, which might be influenced by the northeastern monsoons since air masses could be transported from the north toward Penghu Islands and Dongsha Islands. Air masses blown from South China Sea in summer were much cleaner than those blown from the north in fall, winter, and spring. Chemical analysis results showed that the most abundant water-soluble ionic species of PM2.5 were secondary inorganic aerosols (SIAs) including SO42-, NO3-, and NH4+ which accounted for 50~70% of water-soluble ions (WSIs). The most abundant metallic elements of PM2.5 were crustal elements (Mg, K, Ca, Fe, and Al), while anthropogenic elements (V, Cr, Mn, Ni, As, Cd, and Pb) concentration increased since fall. Organic carbon (OC) was the main species in all seasons, and OC/EC ratios increased during the northeastern monsoon periods. The levoglucosan concentrations in summer and fall were commonly lower than those in winter and spring, showing that PM2.5 concentrations were highly influenced by biomass burning in winter and spring. Correlation analysis results obtained from paired t test showed that the p values of PM2.5 concentration and chemical composition were 0.001 and 0.004, respectively, between two subtropic islands, showing that they had high correlation.… Advisors/Committee Members: Ying-I Tsai (chair), Chung-Shin Yuan (committee member), Wei-Hsiang Chen (chair), Chung-Hsuan Hung (chair).

Subjects/Keywords: correlation analysis; Intersectional region of Taiwan Strait and South China Sea; marine fine particles; cross-boundary transport; chemical fingerprint; source identification

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APA (6th Edition):

Chuang, H. (2016). Spatiotemporal Variation, Chemical Fingerprint, and Source Identification of Atmospheric Fine Particles Long-range Transported toward the Intersectional Region of Taiwan Strait and South China Sea. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0723116-103737

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

Chicago Manual of Style (16th Edition):

Chuang, Hsueh-Lung. “Spatiotemporal Variation, Chemical Fingerprint, and Source Identification of Atmospheric Fine Particles Long-range Transported toward the Intersectional Region of Taiwan Strait and South China Sea.” 2016. Thesis, NSYSU. Accessed July 09, 2020. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0723116-103737.

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

MLA Handbook (7th Edition):

Chuang, Hsueh-Lung. “Spatiotemporal Variation, Chemical Fingerprint, and Source Identification of Atmospheric Fine Particles Long-range Transported toward the Intersectional Region of Taiwan Strait and South China Sea.” 2016. Web. 09 Jul 2020.

Vancouver:

Chuang H. Spatiotemporal Variation, Chemical Fingerprint, and Source Identification of Atmospheric Fine Particles Long-range Transported toward the Intersectional Region of Taiwan Strait and South China Sea. [Internet] [Thesis]. NSYSU; 2016. [cited 2020 Jul 09]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0723116-103737.

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

Council of Science Editors:

Chuang H. Spatiotemporal Variation, Chemical Fingerprint, and Source Identification of Atmospheric Fine Particles Long-range Transported toward the Intersectional Region of Taiwan Strait and South China Sea. [Thesis]. NSYSU; 2016. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0723116-103737

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


NSYSU

3. Huang, Ling-Hsuan. The Influence on De-NOx of Metal-Oxidation Catalysts with acidic modification.

Degree: Master, Environmental Engineering, 2001, NSYSU

Abstract The objective of this study is to compare the performance over copper oxide catalyst under nonselective catalytic reduction of nitric oxide with methane and selective catalytic reduction of nitric oxide with propane. The copper catalysts was prepared by impregnating the support Al2O3 with copper nitrate. In order to find the favorable kind and concentration of acid solutionï¼we conducted the modification of three acid solutions on the support Al2O3 in the same normal concentration in the firstï¼and followed by the test of various concentration of the most-favoured acid. The experiment operated condition was as followï¼ reaction temperature 623K-1023Kï¼F/Wï¼108000ml/hr.gï¼oxygen concentration 2﹪ï¼NOx inlet concentration 1000ppm. In view of the result of NSCR reactions with methane over Cu/γ-Al2O3 catalystï¼the conversion of De-NOx increased with the increasing loading of copper on Cu/γ-Al2O3ï¼and achieved a max. value when copper loading was 8﹪wt.. The performance of De-NOx over the modified copper catalysts three different acid with the same normal concentraionï¼showed that the best reduction efficiency was with nitric acid modifiedï¼then withï¼and followed with acetic acidï¼phosphoric acids. Through compared the conversion of De-NOx between non-modified Cu/γ-Al2O3 with modified Cu/γ-Al2O3ï¼there had the best efficiency in treating for NO conversion. It showed that the best efficiency in raising the conversion of NO over copper catalyst is modified with nitric acidï¼there is not helpful on reduction efficiency of NO by modification with acetic and phosphatic acids. Neverthelessï¼the higher concentrationï¼Nï¼ of nitric acid isï¼the higher efficiency of De-NO isï¼ For the SCR reactions with propane, when the inlet concentraion NO/C3H8 was 1ï¼there has better reductive activity. The trends for the NO conversion versus reaction temperature were similar for the same catalysts used. In general, the NO conversion was an increasing function of copper loading for these copper catalysts. The 8﹪wt. Cu/γ-Al2O3 was found to enhance the NO conversion. The activity of acid-treated catalysts in nitric acid with 2﹪O2 present had the best NO conversion, while the same order was in NSCR reaction. Treating the supports with a higher concentration of acid would result in a higher activity for the copper catalyst, implying that acid treatment not only duces surface area to decrease on catalyst and enhance the reactivity, but also the presence of Cu+ and Cu2+ might be responsible for the reaction efficiency. no matter what the reactant is propane or methan , propane is better reactant to catalyst NO to N2. Advisors/Committee Members: Chung-Hsuan Hung (chair), Jie-Chung Lou (committee member), Jui-Jen Chen (chair), Hsisheng Teng (chair).

Subjects/Keywords: copper catalyst; acid modification

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

APA (6th Edition):

Huang, L. (2001). The Influence on De-NOx of Metal-Oxidation Catalysts with acidic modification. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0912101-165124

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

Chicago Manual of Style (16th Edition):

Huang, Ling-Hsuan. “The Influence on De-NOx of Metal-Oxidation Catalysts with acidic modification.” 2001. Thesis, NSYSU. Accessed July 09, 2020. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0912101-165124.

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

MLA Handbook (7th Edition):

Huang, Ling-Hsuan. “The Influence on De-NOx of Metal-Oxidation Catalysts with acidic modification.” 2001. Web. 09 Jul 2020.

Vancouver:

Huang L. The Influence on De-NOx of Metal-Oxidation Catalysts with acidic modification. [Internet] [Thesis]. NSYSU; 2001. [cited 2020 Jul 09]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0912101-165124.

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

Council of Science Editors:

Huang L. The Influence on De-NOx of Metal-Oxidation Catalysts with acidic modification. [Thesis]. NSYSU; 2001. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0912101-165124

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

.