文献类型：期刊文献

英文题名：Study of Dehydrochlorination of 1,1,2-trichloroethane Over CsCl/Al2O3 Catalyst

作者：Weichu, Wang[1];Xiang, Ge[1];Yu, Chen[1];Jigang, Zhao[1]

机构：[1]East China Univ Sci & Technol, Int Joint Res Ctr Green Energy Chem Engn, Shanghai, Peoples R China

年份：2026

卷号：11

期号：7

外文期刊名：CHEMISTRYSELECT

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001692229500001)】；

语种：英文

外文关键词：1,1,2-TCE; base sites; CsCl; dehydrochlorination; VDC

摘要：Polyvinylidene chloride (PVDC) was one of the essential sealed packaging materials. The desirable production process of vinylidene chloride (VDC), as the polymer monomer of PVDC, urgently needs to be explored because of the shortcomings of the present process. The present investigation was focused on the dehydrochlorination of 1,1,2-trichloroethane (1,1,2-TCE, called as TCE here) to VDC over CsCl/Al2O3. The dehydrochlorination reaction of TCE was carried out in the continuous flow fixed reactor. The effects of content CsCl over CsCl/Al2O3 on the activity of TCE dehydrochlorination were investigated in detail. In addition, the stability and deactivation of 0.6CsCl/Al2O3 in TCE dehydrochlorination were also discussed. The prepared CsCl/Al2O3 catalysts were characterized by XRD, NH3-TPD, CO2-TPD, and N2 adsorption-desorption. The results showed that the conversion of TCE dehydrochlorination was improved up to a maximum with the increment of CsCl loading over CsCl/Al2O3 to 1.0% and then appreciably decreased with further increase of CsCl loading. VDC selectivity was also enhanced with the increase of CsCl loading to 0.6%, and then it was almost leveled off at higher loading. The CsCl loading on Al2O3 greatly reduced the acid sites and produced new base sites. Therefore, it could be considered that the new base sites over CsCl/Al2O3 should be responsible for the improvement of TCE dehydrochlorination activity, although the catalyst activity could not be well correlated with the number of base sites on CsCl/Al2O3. The deactivation of 0.6CsCl/Al2O3 at the initial reaction stage should be attributed to the coverage of base sites by the polymerization macromolecules.