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
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.
Keywords: Sulfur, tin-based catalysts, acetylene hydrochlorination
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