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Titolo:
Hydrodechlorination of CCl4 over Pt/gamma-Al2O3 - Effects of reaction pressure and diluent gases on distribution of products and catalyst stability
Autore:
Bae, JW; Park, ED; Lee, JS; Lee, KH; Kim, YG; Yeon, SH; Sung, BH;
Indirizzi:
Pohang Univ Sci & Technol, POSTECH, Dept Chem Engn, Pohang 790784, South Korea Pohang Univ Sci & Technol Pohang South Korea 790784 790784, South Korea Pohang Univ Sci & Technol, POSTECH, Sch Environm Engn, Pohang 790784, South Korea Pohang Univ Sci & Technol Pohang South Korea 790784 790784, South Korea Samsung Fine Chem Co, Yusung Gu, Taejon 305380, South Korea Samsung Fine Chem Co Taejon South Korea 305380 aejon 305380, South Korea
Titolo Testata:
APPLIED CATALYSIS A-GENERAL
fascicolo: 1-2, volume: 217, anno: 2001,
pagine: 79 - 89
SICI:
0926-860X(20010903)217:1-2<79:HOCOP->2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
CARBON-TETRACHLORIDE; PALLADIUM; TRICHLOROETHYLENE; CHLOROBENZENE; HYDROCARBONS; DESTRUCTION; ZEOLITES;
Keywords:
hydrodechlorination; CCl4; platinum; gamma-Al2O3; temperature-programmed methods; effects of reaction pressure; effects of diluent gases; distribution of products;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
26
Recensione:
Indirizzi per estratti:
Indirizzo: Lee, KH Pohang Univ Sci & Technol, POSTECH, Dept Chem Engn, San 31, Pohang790784,South Korea Pohang Univ Sci & Technol San 31 Pohang South Korea 790784 Korea
Citazione:
J.W. Bae et al., "Hydrodechlorination of CCl4 over Pt/gamma-Al2O3 - Effects of reaction pressure and diluent gases on distribution of products and catalyst stability", APP CATAL A, 217(1-2), 2001, 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 bethe main factor for enhancement of selectivity to CHCl3 and catalytic stability. (C) 2001 Elsevier Science B.V All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/04/20 alle ore 13:38:58