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Lee, Jae Sung
Eco-friendly Catalysis and Energy Lab
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  • Photocatalytic water splitting, artificial photosynthesis, fuel cells, heterogeneous catalysis

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Hydrodechlorination of CCl4 over Pt/gamma-Al2O3 - Effects of reaction pressure and diluent gases on distribution of products and catalyst stability

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Title
Hydrodechlorination of CCl4 over Pt/gamma-Al2O3 - Effects of reaction pressure and diluent gases on distribution of products and catalyst stability
Other Titles
Hydrodechlorination of CCl4 over Pt/gamma-Al2O3 - Effects of reaction pressure and diluent gases on distribution of products and catalyst stability
Author
Bae, Jong WookPark, Eun DuckLee, Jae SungLee, Kyung HeeKim, Young GulYeon, Seung HoSung, Bong Hun
Keywords
hydrodechlorination; CCl4; platinum; gamma-Al2O3; temperature-programmed methods; effects of reaction pressure; effects of diluent gases; distribution of products
Issue Date
2001-09
Publisher
ELSEVIER SCIENCE BV
Citation
APPLIED CATALYSIS A-GENERAL, v.217, no.1-2, pp.79 - 89
Abstract
Pt/gamma -Al2O3 catalysts were prepared by a wet impregnation method and applied for the hydrodechlorination of CCl4 around 400 K. The extent of catalyst deactivation was in line with the propensity of the formation of oligomers (mainly C2Cl4). Both catalyst stability and selectivity to CHCl3 were enhanced when the pressure was increased up to an optimum level. Above the optimum pressure, catalyst deactivation was accelerated with enhanced dimerization of abundantly adsorbed CCl4, due to the relatively hydrogen-deficient environment on the surface. Addition of diluent gases such as CH4, N-2 improved the catalyst stability at pressurized reaction conditions. These gases adsorbed (albeit weakly) on platinum to reduce the selectivity to CHCl3, while improving the catalyst stability. The increased amount of hydrogen adsorbed on the platinum catalyst at high reaction pressures appeared to be the main factor for enhancement of selectivity to CHCl3 and catalytic stability. (C) 2001 Elsevier Science B.V All rights reserved
URI
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DOI
10.1016/S0926-860X(01)00614-7
ISSN
0926-860X
Appears in Collections:
ECHE_Journal Papers
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