Application of MnCeO_(x)supported on palygorskite and Al(OH)_(3)for HCHO oxidation:Catalytic performance and stability  

作　　者：Qiong Huang Lirui Xu Yao Xiao Jie Zhu Guofang An Peiyang Li Bo Yang Mindong Chen Hong Yang 

机构地区：[1]Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technologies,Jiangsu Key Laboratory of Atmospheric Environmental Monitoring&Pollution Control,School of Environmental Science&Engineering,Nanjing University of Information Science&Technology,Nanjing 210044,China [2]Department of Geography and Environmental Science,University of Reading,Whiteknights,Reading,RG66AB,UK

出　　处：《Journal of Rare Earths》2022年第12期1860-1869,I0002,共11页稀土学报（英文版）

基　　金：Project supported by the Natural Science Foundation of Jiangsu Province(BK20170954,BK20150890,BK20190786);the National Natural Science Foundation of China(21501097,51902166)。

摘　　要：Indoor formaldehyde(HCHO)is an important air pollutant,while it is very difficult to reduce HCHO to low-level(e.g.<0.08 mg/m^(3)).Catalytic oxidation at ambient temperature has been increasingly recognized as one of the important methods to mitigate HCHO pollution due to its good effectiveness,stability,and recyclability.To further improve the activity of catalytic oxidation,this study develops the integrated MnCeO_(x)catalysts supported on palygorskite(Pal)and aluminium hydroxide(Al(OH)_(3)).Our results indicate that the synergistic interaction in MnCeO_(x)through the oxygen transfer mechanism from the oxygen reservoir CeO_(2)to MnOxsignificantly improves the activity.Pal,Al(OH)_(3),etc.were applied as the supports with a focus on their dispersion,microstructure,strength,and relative role.MnCeO_(x)can be anchored on the surface of Al(OH)_(3)with high dispersion.With the integrated catalyst,HCHO concentration decreases from 1.012 to 0.086 mg/m^(3)within 48 h.Higher oxidation activity of MnCeO_(x)powder may be ascribed to the amount of active components on the surface.The incorporation of ZSM-5 and activated carbon can improve the adsorption of HCHO,and all integrated catalysts exhibit stronger activities,with HCHO being degraded to the level lower than 0.08 mg/m^(3).Meantime,the samples exhibit good stability and strength(20.2 MPa)without obvious decrease over five consecutive stability experiments.

关 键 词：MnCeOx Integrated catalysts Catalytic oxidation HCHO Ambient temperature Rare earths 

分 类 号：O643.36[理学—物理化学] X51[理学—化学]