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	Dynamic oxygen storage capacity measurements on ceria-based material
	Shen Meiqing ; Wang Xinquan ; An Yuan ; Weng Duan ; Zhao Minwei ; Wang Jun
	2010-05-10 ; 2010-05-10
关键词	oxygen storage capacity ceria-based oxygen storage material dynamic OSC measurement rare earths ZIRCONIA MODEL CATALYSTS 3-WAY CATALYSTS NO REDUCTION PT/CEO2-ZRO2 ADSORPTION CO Chemistry, Applied
中文摘要	Dynamic oxygen storage and release capability (OSC) measurement apparatus was designed to evaluate the OSC performance of ceria-based oxygen storage material. The optimum measurement condition was at a frequency of 0.1 Hz with the inlet gas-flow sequence CO (5S)-> O-2 (5S)-> CO -> O-2 and a flow rate of 300 ml (.) min(-1). Under this condition I similar regular square wave in the inlet and outlet of the reactor was obtained to guarantee the reliability of the dynamic OSC results. The dynamic OSC performance of the CeO2 and Ce0.67Zr0.33O2 mixed oxide prepared using the citric sol-gel method was studied at the optimum measurement condition with focus on both quantitative and qualitative analyses. The results reveal distinctly that Ce0.67Zr0.33O2 had better dynamic OSC performance because of its higher oxygen migration rate than CeO2. Under dynamic conditions, two CO2 production peaks occurred corresponding to the CO pulse and the O-2 pulse, respectively, during the entire cycle. The intensity and ratio between the two CO2 productions were highly influenced by temperature and frequency indicating complex surface phenomena during the oxygen storage/release process. As a result, this set-up can be applied to the evaluation of ceria-based material on the OSC performance.
语种	英语 ; 英语
出版者	METALLURGICAL INDUSTRY PRESS ; BEIJING ; 2 XINJIEKOUWAI DAJIE, BEIJING 100088, PEOPLES R CHINA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/21915]
专题	清华大学
推荐引用方式 GB/T 7714	Shen Meiqing,Wang Xinquan,An Yuan,et al. Dynamic oxygen storage capacity measurements on ceria-based material[J],2010, 2010.
APA	Shen Meiqing,Wang Xinquan,An Yuan,Weng Duan,Zhao Minwei,&Wang Jun.(2010).Dynamic oxygen storage capacity measurements on ceria-based material..
MLA	Shen Meiqing,et al."Dynamic oxygen storage capacity measurements on ceria-based material".(2010).

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