Catalytic performance of Pd catalyst supported on CeO_(2) or ZrO_(2) modified beta zeolite for methane oxidation

作     者：Yingao Zhang Zidi Yan Min Xiao Chunlei Zhang Luna Ruan Yanshuang Zhang Yun Zhong Yong Yan Yunbo Yu Hong He Yingao Zhang;Zidi Yan;Min Xiao;Chunlei Zhang;Luna Ruan;Yanshuang Zhang;Yun Zhong;Yong Yan;Yunbo Yu;Hong He

作者机构：School of Rare EarthsUniversity of Science and Technology of ChinaHefei 230026China Ganjiang Innovation AcademyChinese Academy of SciencesGanzhou 341000China State Key Joint Laboratory of Environment Simulation and Pollution ControlResearch Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China 

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

年 卷 期：2025年第152卷第6期

页      面：248-261页

核心收录：

学科分类：081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by the National Natural Science Foundation of China(Nos.U20B6004 and 22072179) 

主　　题：Methane combustion Palladium catalyst Oxide-zeolite Metal-support interaction Cerium doping Zirconium doping 

摘      要：Two kinds of oxide-zeolite composite support,Ce-beta and Zr-beta were prepared by a simple wet impregnation method and adopted for the preparation of palladium-based catalysts for catalytic oxidation of *** Pd/6.8Zr-beta catalyst showed superiormethane oxidation performance,achieving T_(50) and T90 of 417℃ and 451℃,respectively,together with robust hydrothermal *** analysis has shown that incorporating Zr into the catalyst significantly enhanced its efficiency,nearly tripling the turnover frequency(TOF)for methane combustion compared to the Pd/beta *** enhanced performance was attributed to the dispersion of Zr on the zeolite surface,which not only promoted the formation of active PdO sites but also helped maintain the high Pd^(2+)content via facilitating the oxygen migration during the reaction,thus improving both the catalyst’s activity and *** the Pd/8.6Ce-beta catalyst,doped CeO_(2) tended to aggregate in the zeolite’s pores,adversely affecting the catalyst’s *** aggregation promoted the formation of inactive Pd^(4+) species,a result of the enhanced metal-support *** finding is critical for understanding the implications of dopant selection in the design of high-activity methane oxidation catalysts.