金属氧化物上乙酸乙酯催化燃烧的构效关系  

Structure-activity relationship of ethyl acetate catalytic combustion on metal oxides

作　　者：王伟[1] 沈祖德 孟心宇 王其瑞 WANG Wei;SHEN Zude;MENG Xinyu;WANG Qirui(School of Environmental Science and Engineering,Changzhou University,Changzhou 213164,China)

机构地区：[1]常州大学环境科学与工程学院,江苏常州213164

出　　处：《高校化学工程学报》2024年第4期598-607,共10页Journal of Chemical Engineering of Chinese Universities

基　　金：国家自然科学基金青年项目(22106010);常州市领军型创新人才引进培育项目(CQ20210108)。

摘　　要：为了明确金属氧化物上酯类挥发性污染物催化燃烧的构效关系与反应机理。采用简单热解法制备了一系列金属氧化物MO_(x)(M=Ce、Co、Al、Mg、V、W)催化剂,通过不同的表征手段,探究它们的表面性质与乙酸乙酯(EA)催化燃烧性能之间的关系。结果表明,CeO_(2)呈现最优的EA降解活性和产物选择性。CeO_(2)的表面羟基有利于EA的水解,同时,其表面适度的酸性,减弱了乙醇等中间产物的强烈吸附。重要的是,CeO_(2)具有优异的表面晶格氧迁移能力,有利于气相产物以及表面水解物种(乙酸盐/乙醇盐)的快速氧化分解。In order to clarify the structure-activity relationship and reaction mechanism of catalytic combustion of ester volatile pollutants on metal oxides,a simple pyrolysis method was used to prepare a series of metallic oxide catalysts MO_(x)(M=Ce,Co,Al,Mg,V,W).The relationship between their surface properties and the performance of EA catalytic combustion was investigated by different characterization methods.Among these MO_(x)catalysts,CeO_(2)shows the best activity and product selectivity.The surface hydroxyl groups of CeO_(2)are conducive to the EA hydrolysis,and its moderate acidity weakens the strong adsorption of intermediate products,such as ethanol.In addition,CeO_(2)has excellent surface lattice oxygen mobility,which facilitates the rapid oxidative decomposition of gas phase products and surface adsorbed chemicals(such as acetates and ethoxides).

关 键 词：金属氧化物 催化燃烧 乙酸乙酯 氧化铈 表面性质 

分 类 号：TQ630[化学工程—精细化工]