Catalytic combustion of toluene on Pt/Al_(2)O_(3) and Pd/Al_(2)O_(3) catalysts with CeO_(2),CeO_(2)-Y_(2)O_(3) and La_(2)O_(3) as coatings  

作　　者：Bing Zhou Quanli Ke Meijun Wen Tianbiao Ying Guokai Cui Ying Zhou Zhenyu Gu Hanfeng Lu 

机构地区：[1]Institute of Catalytic Reaction Engineering,College of Chemical Engineering,Zhejiang University of Technology,Hangzhou 310014,China [2]Key Laboratory of Environmental Pollution Control Technology Research of Zhejiang Province,Eco-environmental Science Research&Design Institute of Zhejiang Province,Hangzhou 310007,China

出　　处：《Journal of Rare Earths》2023年第8期1171-1178,I0002,共9页稀土学报（英文版）

基　　金：supported by the Scientific Research Fund of Zhejiang Provincial Education Department(Y202043197);the National Natural Science Foundation of China(22078294);the Natural Science Foundation of Zhejiang Province(LZ21E080001,LGF20E080018);the Key Laboratory of Environmental Pollution Control Technology Research of Zhejiang Province(2021ZEKL04)。

摘　　要：CeO_(2),La_(2)O_(3),and CeO_(2)-Y_(2)O_(3) oxides were coated on the surface of spherical granular AI_(2)O_(3)(3-5 mm)through impregnation method,and proved as better supports of Pd and Pt catalysts.The influences of rare earth metal doping on the adsorption rates of Pd and Pt ions,as well as the catalytic performance,were investigated.Results show that the H_(2)PtCl_(6)·6H_(2)O adsorption rates of the Al_(2)O_(3) carriers modified by Ce,La,and CeY increase significantly.These rare earth coatings can adsorb almost all H2PtCl_(6)·6H_(2)O in the solution.Compared with Pt/Al_(2)O_(3) catalyst,Pt/Ce-AI_(2)O_(3) and Pt/CeY-AI_(2)O_(3) catalysts have better degradation performance for toluene,and the T_(90) temperatures are both about 147℃.According to X-ray photoelectron spectroscopy(XPS)characterization,Pt^(0)is an important active species for catalytic oxidation reaction of toluene.After CeO_(2)modification to the conventional Pt/Al_(2)O_(3)catalyst,the proportion of Pt^(0)increases from 74.5%to 82.1%.When the Pt^(0)content in the metal state is improved,the redox activity of the catalyst is promoted correspondingly.

关 键 词：Volatile organic compounds Catalytic oxidization Carrier modification Pt/Ce-Al_(2)O_(3) Rare earths 

分 类 号：TQ426[化学工程] X701[环境科学与工程—环境工程]