Journal
JOURNAL OF SAUDI CHEMICAL SOCIETY
Volume 23, Issue 8, Pages 1219-1230Publisher
ELSEVIER
DOI: 10.1016/j.jscs.2019.08.002
Keywords
Sn based catalysts; Li additives; Acetylene hydrochlorination
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The study of a novel catalyst containing LiCl and SnCl2 (LiSn/AC) for acetylene hydrochlorination has been reported in this paper. Furthermore, the performance of both high activity (98.3%) and selectivity (> 98.0%) are achieved by LiSn/AC catalysts under the reaction temperature of 200 degrees C and C2H2 hourly space velocity of 30 h(-1). The structural characteristics of the Sn based catalysts were deeply researched via BET, XRD, TEM, TPR, C2H2-TPD, XPS and TG techniques. According to these characteristic results, we proposed that the presence of Sn2+ exhibited better activity and stability than that of Sn4+ in Sn based catalysts. Additionally, LiCl additives not only can restrain the oxidation of Sn2+ and the loss of Sn4+ in fresh Sn based catalysts but also make the Sn delta+ (delta = 2,4) species dispersed well on the surface of support. Therefore, the adsorption capacity of C2H2 and HCl was enhanced in LiSn/AC, which exhibited the better catalytic performance than that of Sn based catalyst. (C) 2019 King Saud University. Production and hosting by Elsevier B.V.
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