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
王伟 1沈祖德 1孟心宇 1王其瑞1
作者信息
- 1. 常州大学 环境科学与工程学院,江苏 常州 213164
- 折叠
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MOx(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,CeO2呈现最优的EA降解活性和产物选择性.CeO2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,CeO2 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.
Abstract
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 MOx(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 MOx catalysts,CeO2 shows the best activity and product selectivity.The surface hydroxyl groups of CeO2 are conducive to the EA hydrolysis,and its moderate acidity weakens the strong adsorption of intermediate products,such as ethanol.In addition,CeO2 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Key words
metal oxides/catalytic combustion/ethyl acetate/CeO2/surface properties引用本文复制引用
基金项目
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)
出版年
2024
国家科技期刊平台
NSTL
万方数据