文献类型：期刊文献

英文题名：Catalytic oxidation of chlorinated VOCs over Ru/TixSn1-x catalysts

作者：Zhao, Jian[1];Xi, Wangjia[1];Tu, Chensheng[1];Dai, Qiguang[1];Wang, Xingyi[1]

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

年份：2020

卷号：263

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENTAL

收录：;EI(收录号：20194507627349);WOS:【SCI-EXPANDED(收录号:WOS:000510526000022)】；

基金：We would like to acknowledge the National Key Research and Development Program of China (no. 2016YFCO204300) and National Natural Science Foundation of China (no. 21976056and21777043).

语种：英文

外文关键词：Dichloromethane; Chlorobenzene; Titanium; Tin; Ruthenium; Catalytic combustion

摘要：Ru/TixSn1-x catalysts, prepared by incipient-wetness with aqueous solution of RuCl3 were applied in the catalytic oxidation of dichloromethane (DCM) and chlorobenzene (CB). In mixed oxides of TixSn1-x, Sn4+ entered into TiO2-rutile and Ti4+, into SnO2-rutile, forming Ti-O-Sn species, which disordered rutile lattice and increased strong Lewis acid. Ru was identified as Ru-O-Ti and Ru-O-Sn, as a result of the interaction between TiO2 or SnO2 and Ru. Ru-O-Sn increased surface oxygen, while Ru-O-Ti promoted the basicity of surface lattice oxygen. In oxidation of DCM at 240 degrees C and CB at 275 degrees C, Ru/TixSn1-x catalysts presented high activity with the rates of 0.084-0.201 and 0.046-0.719 umol min(-1)m(-2), respectively, which was ascribed to the synergism between Ru-OTi and Ru-O-Sn. At 90% conversion, CO2 was almost only the carbon-containing product. Ru/TixSn1-x catalysts maintained stable activity for at least 50 h without substantial changes. High activity for Deacon was responsible for quick removal of Cl species, which was a slow step in the reaction. In the presence of water, the temperature needed for 100% conversion maintained constant. In situ FT-IR showed that chloromethoxyl and phenolate were the adsorbed species of DCM and CB, respectively, which were sequentially converted by surface oxygen into carboxylates and CO2.