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 °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^δ+ (δ = 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.

本文报道了一种新型的含LiCl和SnCl _2的催化剂（LiSn / AC）用于乙炔氢氯化反应的研究。此外，在200℃的反应温度和30h ^-1的C ₂ H ₂时空速度下，LiSn / AC催化剂实现了高活性（98.3％）和选择性（> 98.0％）的性能。通过BET，XRD，TEM，TPR，C ₂ H ₂ -TPD，XPS和TG技术对锡基催化剂的结构特征进行了深入研究。根据这些特征结果，我们认为Sn ²⁺的存在比Sn ^4+具有更好的活性和稳定性。在锡基催化剂中。此外，LiCl添加剂不仅可以抑制新鲜Sn基催化剂中Sn ²⁺的氧化和Sn ⁴⁺的损失，还可以使^Snδ+（δ  = 2,4）物种良好地分散在载体表面上。因此，LiSn / AC中C ₂ H ₂和HCl的吸附能力得到增强，其催化性能优于Sn基催化剂。