Tin-sulfur based catalysts for acetylene hydrochlorination

Yibo Wu; Fuxiang Li; Xiaoqiang Luo; Gang Tian; Yunxiao Feng; Yongjun Han; Li Wang; Songmao Chu; Yunli Cao; Kesheng Cao; Xiaoming Hu; Xuejun Shi; Songtian Li; Guoxv He; Qingbin Li

doi:10.3906/kim-2010-36

Tin-sulfur based catalysts for acetylene hydrochlorination

Turk J Chem. 2021 Jun 30;45(3):566-576. doi: 10.3906/kim-2010-36. eCollection 2021.

Authors

Yibo Wu^{1

2}, Fuxiang Li², Xiaoqiang Luo¹, Gang Tian¹, Yunxiao Feng¹, Yongjun Han¹, Li Wang¹, Songmao Chu¹, Yunli Cao¹, Kesheng Cao¹, Xiaoming Hu¹, Xuejun Shi¹, Songtian Li¹, Guoxv He¹, Qingbin Li¹

Affiliations

¹ College of Chemistry and Environmental Engineering, Pingding Shan University, Pingding Shan China.
² College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan China.

Abstract

In the present work, tin-sulfur based catalysts were prepared using Na₂SO₃ and (CH₃SO₃)₂Sn and were tested in acetylene hydrochlorination. Based on the analysis of experiments results, the acetylene conversion of (CH₃SO₃)₂Sn/S@AC is still over 90%after a 50 h reaction, at the reaction conditions of T = 200 ^oC, V_HCl/V_C2H2 = 1.1:1.0 and C₂H₂-GSHV = 15 h^-1. According to the results of X-ray photoelectron spectroscopy (XPS), HCl adsorption experiments, and acetylene temperature programmed desorption (C₂H₂-TPD), it is reasonable to conclude that the interaction between Sn and S not only can retard the oxidation of Sn²⁺ in catalysts but also strengthen the reactant adsorption capacity of tin-based catalysts. Furthermore, results obtained from nitrogen adsorption/desorption and XPS proved that the CH₃SO₃- can effectively decrease the coke deposition of (CH₃SO₃)₂Sn/AC and thus prolong the lifetime of (CH₃SO₃)₂Sn/AC.

Keywords: acetylene hydrochlorination; tin-based catalysts; ulfur.