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

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 HgCl2/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(C2H2) of 1.15. Moreover, the HgCl2/EML-VMT-C shows good stability. The EML-VMT also shows potential in the preparation of other EML-VMT-supported catalysts.

Graphical abstractA novel expanded multilayered vermiculite (EML-VMT) is firstly successfully used as a catalyst support for the acetylene hydrochlorination. By mixing carbon on the surface of EML-VMT (i.e., EML-VMT-C), the HgCl2/EML-VMT-C achieved a high acetylene conversion of 97.3%, a vinyl chloride selectivity of 100% and a turn over frequency value of 8.83 × 10−3 s−1. The EML-VMT also shows the potential in the preparation of other EML-VMT-supported catalysts.Figure optionsDownload full-size imageDownload as PowerPoint slide