Effect of Al2O3 doping on the structure and performance of an Al2O3/Fe2O3 catalyst for mercury oxidation

作     者：Ruihui Liu Tingyu Zhu Li Tong Wenqing Xu Ruihui Liu;Tingyu Zhu;Li Tong;Wenqing Xu

作者机构：School of Resources and Civil EngineeringNortheastern UniversityShenyang 110819China Research Center for Process Pollution ControlNational Engineering Laboratory for Hydrometallurgical Cleaner Production TechnologyInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Resources and MaterialsNortheastern University at QinhuangdaoQinhuangdao 066004China Key Laboratory of Dielectric and Electrolyte Functional Material Hebei ProvinceQinhuangdao 066004China Department of Air Pollution ControlBeijing Municipal Institute of Labor ProtectionBeijing 100054China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2020年第32卷第4期

页      面：138-145页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：supported by the National Key Research and Development Program of China(No.2017YFC0210501) National Natural Science Foundation of China(No.21607009) National Engineering Laboratory for Flue Gas Pollutants Control Technology and Equipment(No.NEL-KF-201902) 

主　　题：Mercury Catalytic oxidation Fe2O3 Al2O3 Thermal stability 

摘      要：In this study,the thermal stability of a Fe2 O3 catalyst for mercury oxidation was significantly improved by doping with Al2 *** 1 hr,the catalyst doped with 10 wt.%Al2 O3 still exhibited a mercury conversion efficiency of 70.9%,while the undoped sample even lost its catalytic *** with Al2 O3 retarded the collapse of the catalyst mesoporous structure during high-temperature calcination,and the doped samples maintained a higher specific surface area,smaller pore size,and narrower pore size *** electron microscope images revealed that after calcination at 350℃,the average size of the catalyst grains in Fe2 O3 was 23.4 nm;however,the corresponding values for 1%Al2 O3/Fe2 O3,3%Al2 O3/Fe2 O3,and 10%Al2 O3/Fe2 O3 were only 13.3,7.1,and 4.7 nm,*** obtained from X-ray diffraction and thermogravimetry coupled with differential scanning calorimetry confirmed that doping with Al2 O3 also retards the crystallization of the catalysts at high temperature,constraining catalyst grains to a smaller size.