文献类型：期刊文献

英文题名：Effect of Cu modification to Ru/HZSM-5 catalysts on the catalytic combustion of vinyl chloride

作者：Li, Mingqi[1];Wang, Yunyun[1];Ding, Min[1];Zhan, Wangcheng[1];Wang, Li[1];Dai, Qiguang[1];Guo, Yun[1];Wang, Aiyong[1];Guo, Yanglong[1]

机构：[1]East China Univ Sci & Technol, Res Inst Ind Catalysis, Sch Chem & Mol Engn, State Key Lab Green Chem Engn & Ind Catalysis, Shanghai 200237, Peoples R China

年份：2024

卷号：14

期号：11

起止页码：3150

外文期刊名：CATALYSIS SCIENCE & TECHNOLOGY

收录：;EI(收录号：20241815999847);WOS:【SCI-EXPANDED(收录号:WOS:001208376800001)】；

基金：The authors acknowledge support from the National Key Research and Development Program of China (2022YFB3504200, 2023YFA1508500), the National Natural Science Foundation of China (22106101), and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Catalysis - Catalyst selectivity - Chlorine compounds - Combustion - Copper - Polyvinyl chlorides

摘要：Vinyl chloride is a crucial raw material for producing polyvinyl chloride. Improper emissions of vinyl chloride during production can cause significant harm to ecosystems and human health. In this work, we prepared Cu-modified Ru/HZSM-5 catalysts by the impregnation method, and investigated the effect of Cu addition on the catalytic combustion of vinyl chloride. The catalytic activity of the Ru/HZSM-5 catalyst was significantly promoted by Cu modification. The T90 of the Ru-2Cu/HZSM-5 catalyst was reduced by 68 degrees C compared to that of the Ru/HZSM-5 catalyst. The promotion effect of Cu modification was also reflected in the catalytic combustion performance of 1,2-dichloroethane. However, the introduction of Cu had a negative effect on the by-product selectivity. Further modifying the Ru-2Cu/HZSM-5 catalyst with Nb effectively improved selectivity to by-products. The Ru-2Cu/HZSM-5 catalyst also exhibited better cycling stability and water resistance stability than the Ru/HZSM-5 catalyst. Catalyst characterization results showed that the addition of Cu promoted Ru dispersion. Furthermore, the modification with Cu significantly enhanced the redox ability and oxygen mobility of the catalysts, resulting in improved catalytic activity. Additionally, in situ DRIFTS experiments were employed to propose the reaction mechanism for vinyl chloride oxidation over the Ru-2Cu/HZSM-5 catalyst. The redox capacity of Ru-2Cu/HZSM-5 catalyst is improved by Cu modification, resulting in increased activity for catalytic combustion of VC.