Tin-sulfur based catalysts for acetylene hydrochlorination |
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| Authors: | 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 |
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| Institution: | 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 |
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| 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, VHCl/VC2H2 = 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. |
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| Keywords: | ulfur tin-based catalysts acetylene hydrochlorination |
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