文献类型：期刊文献

英文题名：Removal of Cl adsorbed on Mn-Ce-La solid solution catalysts during CVOC combustion

作者：Wang, Xingyi[1];Ran, Le[1];Dai, Yu[1];Lu, Yuanjiao[1];Dai, Qiguang[1]

机构：[1]E China Univ Sci & Technol, Res Inst Ind Catalysis, Adv Mat Lab, Shanghai 200237, Peoples R China

年份：2014

卷号：426

起止页码：324

外文期刊名：JOURNAL OF COLLOID AND INTERFACE SCIENCE

收录：;EI(收录号：20142017717733);WOS:【SCI-EXPANDED(收录号:WOS:000337266900043)】；

基金：We would like to acknowledge the financial support from National Basic Research Program of China (Nos. 2010CB732300 and 2011AA03A406), National Natural Science Foundation of China (No. 20977029) and the Commission of Science and Technology of Shanghai Municipality (No. 11 JC1402900).

语种：英文

外文关键词：Chlorobenzene; Cl adsorption; Deactivation; Deacon reaction; Mn-Ce-La-O solid solution

摘要：Mn-Ce-La oxide-mixed catalysts prepared by the method of complexation followed by calcination at 750 degrees C were tested in the catalytic combustion of chlorobenzene (CB) taken as a model of chlorinated aromatics. XRD analyses show that Mn and La enter CeO2 matrix with a fluorite-like structure to form solid solution. The catalysts with high ratio of Mn/Mn + Ce + La exhibit high activity for CB combustion, due to high oxygen mobility. For all Mn-Ce-La catalysts, deactivation due to Cl adsorption is observed at different temperatures, depending on composition. At 330 degrees C or higher temperature, the removal of Cl species from the surface in the forms of Cl-2 (produced through Deacon reaction) and HCl (produced through hydrolysis of Cl) occurs and the activity of catalysts for CB combustion becomes thus stable. Either the addition of water or the increase in gaseous oxygen concentration can promote the removal of Cl species, and thus to increase the activity for CB combustion. High stable activity of Mn-Ce-La catalysts can be related to the combination of good oxidation and Deacon reaction performances. (C) 2014 Elsevier Inc. All rights reserved.