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Citation: ZHANG Dong-Bao, LI Ming-Shi, LU Mo-Hong, ZHU Jian-Jun, SHAN Yu-Hu. Hydrodechlorination of CCl₄ over Pt/Al₂O₃ and Pt-Cu/Al₂O₃ Catalysts[J]. Chinese Journal of Applied Chemistry, ;2010, 27(10): 1156-1160. doi: 10.3724/SP.J.1095.2010.90745 shu

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

a. Department of Chemical Engineering, Jiangsu Polytechnic University, Changzhou 213164;
b. Nantong Haidi Chemicals Co., LTD., Haimen

Received Date: 12 November 2009
Revised Date: 10 May 2010

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 CCl₂ CCl₂ 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 CCl₂ CCl₂ was also increased by adding CH₃OH.
- Pt/Al₂O₃,
- Pt-Cu/Al₂O₃,
- carbon tetrachloride,
- hydrodechlorination
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Hydrodechlorination of CCl₄ over Pt/Al₂O₃ and Pt-Cu/Al₂O₃ Catalysts