文献类型：期刊文献

英文题名：Comparative studies of P/CeO2 and Ru/CeO2 catalysts for catalytic combustion of dichloromethane: From effects of H2O to distribution of chlorinated by-products

作者：Dai, Qiguang[1];Wu, Jinyan[1];Deng, Wei[2];Hu, Jiasu[3];Wu, Qingqing[1];Guo, Limin[2];Sun, Wei[1];Zhan, Wangcheng[1];Wang, Xingyi[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Res Inst Ind Catalysis, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]Huazhong Univ Sci & Technol, Sch Environm Sci & Technol, Wuhan 430074, Hubei, Peoples R China;[3]Hangzhou EKPEC Technol Dev Co Ltd, Hangzhou 310052, Zhejiang, Peoples R China

年份：2019

卷号：249

起止页码：9

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENTAL

收录：;EI(收录号：20190906559936);WOS:【SCI-EXPANDED(收录号:WOS:000464487500002)】；

基金：This work was supported by the National Key Research and Development Program of China (No. 2016YFC0204300), the National Natural Science Foundation of China (No. 21777043) and Shanghai Pujiang Program.

语种：英文

外文关键词：Catalytic oxidation; CVOCs; Phosphate; Ruthenium oxide; Ceria

摘要：Phosphate- and ruthenium oxide-supported CeO2 (P/CeO2 and Ru/CeOO2), as typical CeO2-based catalysts, were comparatively studied to fully elucidate catalytic combustion of dichloromethane (DCM), especially for the effects of H2O and the formation of chlorinated by-products. The results indicated that the reversible inhibitive effect of H2O became increasingly intense in the following order: pristine CeO2 < Ru/CeO2 < R/CeO2, moreover, the inhibition was more notable at the lower reaction temperature but almost disappeared at temperatures above 300 degrees C. H2O-TPD and various DRIFTS techniques revealed that the adsorption strength of H2O depended on the surface properties of three CeO2-based catalysts and the reaction temperature, which eventually determined the degree of activity inhibition. Dechlorinated (monochloromethane, MCM) and ploychlorinated (CHCl3 and CCl4) by-products were more easily formed over non-metallic P/CeO2 and metallic Ru/CeO2, respectively, due to the different redox and metallic properties of these CeO2-based catalysts, which was also further confirmed by catalytic oxidation of other chlorinated volatile organic compounds (Cl-VOCs). Additionally, more complete oxidation (the formation of CO2 and Cl-2) occurred on Ru/CeO2.