Hydrodechlorination of CCl4 over Pt/Al2O3 and Pt-Cu/Al2O3 Catalysts

doi:10.3724/SP.J.1095.2010.90745

Chinese Journal of Applied Chemistry ›› 2010, Vol. 27 ›› Issue (10): 1156-1160.DOI: 10.3724/SP.J.1095.2010.90745

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Hydrodechlorination of CCl4 over Pt/Al2O3 and Pt-Cu/Al2O3 Catalysts

ZHANG Dong-Bao1,2, LI Ming-Shi1*, LU Mo-Hong1, ZHU Jian-Jun1, SHAN Yu-Hua1

(1.Department of Chemical Engineering,Jiangsu Polytechnic University,Changzhou 213164;
2.Nantong Haidi Chemicals CO.,LTD.,Haimen)

Received:2009-11-12 Revised:2010-05-05 Published:2010-10-10 Online:2010-10-10

Abstract

Abstract:

Hydrodechlorination of CCl4 over Pt/Al2O3 and Pt-Cu/Al2O3 bimetallic catalysts was studied. The influence of reduction temperature of the catalysts on catalytic performance was investigated. CHCl3 was the main product over Pt/Al2O3, but products varied with reduction temperature over Pt-Cu/Al2O3. The main product was CHCl3 over Pt-Cu/Al2O3 reduced at 400 ℃, while the main product was CCl2CCl2 over the catalyst reduced at 800 ℃. Hydrodechlorination of CCl4 is a strongly exothermic reaction, which leads to local overheating on the surface of catalysts. C2 products may carbonize on overheated sites and cover the active sites, which resulted in deactivation of the catalysts. The stability of catalysts can be improved by adding CH3OH as solvent, which entrapped reaction heat. In addition, the selectivity towards CCl2CCl2 was also increased by adding CH3OH.

Key words: Pt/Al2O3, Pt-Cu/Al2O3, carbon tetrachloride, hydrodechlorination

CLC Number:

O643.3

ZHANG Dong-Bao1,2, LI Ming-Shi1*, LU Mo-Hong1, ZHU Jian-Jun1, SHAN Yu-Hua1. Hydrodechlorination of CCl4 over Pt/Al2O3 and Pt-Cu/Al2O3 Catalysts[J]. Chinese Journal of Applied Chemistry, 2010, 27(10): 1156-1160.

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Hydrodechlorination of CCl4 over Pt/Al2O3 and Pt-Cu/Al2O3 Catalysts

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