Hydrochlorination of acetylene using expanded multilayered vermiculite (EML-VMT)-supported catalysts

Abstract

Abstract Catalyst supports have very important effects on catalyst performance. A novel expanded multilayered vermiculite (EML-VMT) is successfully used as the catalyst support for the acetylene hydrochlorination. By mixing carbon on the surface of EML-VMT ( i.e. , EML-VMT-C), the HgCl 2 /EML-VMT-C achieved a high acetylene conversion of 97.3%, a vinyl chloride selectivity of 100% and a turn over frequency (TOF) value of 8.83 × 10 −3 s −1 at a temperature of 140 °C, an acetylene gas hourly space velocity (GHSV) of 108 h −1 , and a feed volume ratio V(HCl)/V(C 2 H 2 ) of 1.15. Moreover, the HgCl 2 /EML-VMT-C shows good stability. The EML-VMT also shows potential in the preparation of other EML-VMT-supported catalysts.