文献类型：期刊文献

英文题名：Catalytic combustion of CVOCs over MoOx/CeO2 catalysts

作者：Zhang, Hao[1];Gao, Xiaohui[1];Gong, Binwei[1];Shao, Shijie[1];Tu, Chensheng[1];Pan, Jun[2];Wang, Yangyang[2];Dai, Qiguang[1];Guo, Yanglong[1];Wang, Xingyi[1]

机构：[1]East China Univ Sci & Technol, Res Inst Ind Catalysis, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[2]Aviat Electromech Syst Integrat Aviat Sci & Techno, Nanjing 211106, Peoples R China

年份：2022

卷号：310

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY

收录：;EI(收录号：20221311868074);WOS:【SCI-EXPANDED(收录号:WOS:000803806500003)】；

基金：Acknowledgments We would like to acknowledge the National Natural Science Foun-dation of China (no. 21976056, 21777043 and 21922602) .

语种：英文

外文关键词：2-chloroethane; Molybdenum; Ceria; Chlorination; Catalytic combustion

摘要：MoOx/CeO2 catalysts prepared by impregnation with (NH4)(6)H8Mo7O28 aqueous solution were applied for catalytic oxidation of 1,2-dichloroethane. MoOx exists on CeO2 fluorite as isolated (O=)(2)Mo(O-Ce)(2), poly MoO4 and nano-particles, of which (O=)(2)Mo(O-Ce)(2) presents high acidity and reducibility of Mo, and decreases the basicity of CeO2, leading to the formation of reactive intermediate during 1,2-dichloroethane adsorption. The activity of MoOx/CeO2 catalysts for 1,2-dichloroethane oxidation increases with acidity and surface oxygen from CeO2 domain. The catalyst with 2.6 Mo atom nm(-2) presents the highest apparent activity with T-90 of 280 degrees C in feed containing 1000/2000 ppm 1,2-dichloroethane at 60,000 h(-1) space velocity. For chlorinated aromatic oxidation, similar high stable activity is observed. The ability of (O=)(2)Mo(O-Ce)(2) for water dissociation promotes Cl removal, and thus, the chlorination is inhibited completely within experiment temperature. Mo6+=O of (O=)(2)Mo(O-Ce)(2) is highly stable in wet feed, leading to high resistance of MoOx/CeO2 catalysts to water.