Trimetallic Au-Cu-La/AC for Acetylene Hydrochlorination in a Multi-Tubular Fixed Bed Reactor

Document Type: Research Article

Authors

1 International Joint Research Center of Green Energy Chemical Engineering, East China University of Science and Technology, Shanghai 200237, P.R. CHINA

2 Tianjin Dagu Chemical Co., Ltd., Tianjin, 300455, P.R. CHINA

3 Chemical and Biological Engineering Department, University of British Columbia, Vancouver, British Columbia, V6T1Z3, CANADA

Abstract

The metal chloride of LaCl3 was chosen to modify the Au-Cu/AC to decrease the noble metal of gold and enhance the catalytic performances. Then a mercury-free catalyst of Au-Cu-La/AC was prepared by the impregnation method, and the fresh Au-Cu-La/AC and Au-Cu/AC catalysts were also characterized in comparison. The catalytic performances of mercury-free catalysts for acetylene hydrochlorination were carried out for 3500 hours in a multi-tubular fixed bed reactor. The additives of La can make the active species dispersed well and retard the aggregation of particles. And the acetylene conversion rate remained stable over 98.5% with the fluctuations, less than 1%, and the selectivity of vinyl chloride maintained the stability of 99% or higher, which indicated that the mercury-free catalyst has excellent catalytic performances for acetylene hydrochlorination.

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