Abstract: Using AuCl3 as active component, BiCl3 as additive and active carbon as carrier, AuCl3-BiCl3/C catalysts were prepared by impregnation method and were characterized by BET，XRD and TEM. The catalytic performance and selectivity to VCM were investigated in a fixed bed reactor. The results showed that adding BiCl3 is beneficial to enhancing the performance and inhibiting coke deposition during the reaction. Among catalysts prepared, the 0.3%AuCl3-0.9%BiCl3/C catalyst is the best one. The active components are highly dispersed on the surface of the carrier. Under the reaction conditions of C2H2 hourly space velocity of 20h-1, feed volume ratio V(HCl)/V(C2H2)=1:1.1, the conversion of acetylene is up to 98.9%, the selectivity to VCM is up to 99.7% after test for 24h.

Key words: AuCl3- BiCl3/C, acetylene, hydrochlorination