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

The metal chloride of LaCl۳ 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 ۳۵۰۰ 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 ۹۸.۵% with the fluctuations, less than ۱%, and the selectivity of vinyl chloride maintained the stability of ۹۹% or higher, which indicated that the mercury-free catalyst has excellent catalytic performances for acetylene hydrochlorination.

کلیدواژه ها:

Mercury-free catalyst ، Acetylene hydrochlorination ، La ، Gold ، multi-tubular fixed bed reactor