文献类型：期刊文献

英文题名：Revealing the effect of framework acidity on the catalytic combustion of vinyl chloride over zeolite-based catalysts

作者：Li, Mingqi[1];Cai, Yuang[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：340

外文期刊名：SEPARATION AND PURIFICATION TECHNOLOGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001199190900001)】；

基金：The authors acknowledge support from the National Key Research and Development Program of China (2023YFA1508500, 2023YFC3707500, 2022YFB3504200) , China; the National Natural Science Foundation of China (U21A20326, 22106101) , China; and the fund of the National Engineering Laboratory for Mobile Source Emission Control Technology (NELMS2020A05) , China; and the Fundamental Research Funds for the Central Universities, China.

语种：英文

外文关键词：Catalytic combustion; Lewis acid catalyst; Sn-MFI; Vinyl chloride; Ruthenium

摘要：The study explored the effect of different types of acid sites on the catalytic combustion of vinyl chloride over zeolite-based catalysts. MFI-type zeolites were synthesized using impregnation method and loaded with the noble metal Ru. Results indicated that the Ru/Sn-MFI catalysts possessed only Lewis acid sites, the Ru/Al-MFI catalysts were primarily governed by Bronsted acid sites, and the Ru/Si-MFI catalysts had no acid sites. The Ru/Sn-MFI catalyst containing Lewis acid sites demonstrated increased catalytic activity, with a T90 of up to 306 C-degrees, and efficiently prevented the formation of chlorinated by-products. In contrast, the Ru-Si/MFI catalyst exhibited inferior catalytic activity. While a significant amount of chlorinated by-products was generated on the Ru/Al-MFI catalyst. The substantial amount of Lewis acid sites on the surface of Ru/Sn-MFI catalyst facilitated the activation of C-Cl bonds and the cleavage of C-C bonds. Furthermore, the Ru/Sn-MFI catalysts had improved lowtemperature reducibility and oxygen mobility, which contributed to the deep oxidation of vinyl chloride.