Nonuniformly active $Pt/SiO_2$ catalyst = 불균일한 활성분포를 가진 백금-실리카젤 촉매

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Seven different nonuniformly-active Pt/$SiO_2$ catalysts were prepared in the ion exchange method with the variation of contact time during the ion exchange process to investigate the effect of contact time upon the content and distribution of platinum in the catalyst. Pt uptake of the silica support was measured with an atomic absorption spectrophotometer and compared with the results of the transient diffusion equation solved by the finite difference method under some appropriate assumptions. Deposited Pt profile in the silica particle was also predicted from the theoretical analysis. Surface structure of the catalysts was investigated by use of the gas chromatographic pulse technique of hydrogen chemisorption measurement. All the catalysts prepared were found to have H/Pt ratio of approximately unity, therefore surface of highly-dispersed state. Catalytic reaction rates on these nonuniformly-active catalysts were explained theoretically with the concepts of effectiveness factor and apparent effectiveness factor, and were actually measured using the vapor phase hydrogenation of cyclohexene as a test reaction. Experimental results showed good agreement with the predictions from the theoretical analysis
Advisors
김영걸
Description
한국과학기술원 : 화학공학과,
Publisher
한국과학기술원
Issue Date
1980
Identifier
62650/325007 / 000781013
Language
eng
Description

학위논문 (석사) - 한국과학기술원 : 화학공학과, 1980.2, [ iii, 99 p. ]

URI
http://hdl.handle.net/10203/30081
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=62650&flag=dissertation
Appears in Collection
CBE-Theses_Master(석사논문)
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