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	A mass transfer based method for measuring the reaction coefficients of a photocatalyst
	Yang, Rui ; Zhang, Yinping ; Xu, Qiujian ; Mo, Jinhan
	2010-05-11 ; 2010-05-11
关键词	indoor air quality formaldehyde titania photocatalytic oxidation air purification VOLATILE ORGANIC-COMPOUNDS OXIDATION AIR MODEL PHOTOOXIDATION FORMALDEHYDE PERFORMANCE REACTORS TITANIA TOLUENE Environmental Sciences Meteorology & Atmospheric Sciences
中文摘要	We have developed a new method, the mass transfer based (MTB) method, for measuring the Langmuir-Hinshelwood (L-H) rate form reaction coefficients of photocatalysts. The conventional method for determining the reaction coefficients disregards the effect of mass transfer on the reaction surface by designing and controlling a reaction process to be reaction-limited. In contrast, the new MTB method takes the mass transfer effect into account by using a computational fluid dynamics (CFD) method. The reaction coefficients can be regressed by the measured reaction rates and the calculated VOC concentrations in the air adjacent to the reaction Surface. Thus, by using the new method, the reaction coefficient of a reaction process can be accurately determined even if it is not reaction-limited. This is very important in cases where it is difficult to realize reaction-limited processes, such as photocatalytic oxidation of VOCs with strong UV radiation intensity. The relative error of the regressed reaction coefficients obtained by the new method is analyzed. To illustrate, we apply this method to measuring the reaction coefficients of TiO2 photocatalytic decomposing formaldehyde. This method is very useful in determining the reaction coefficients of the photocatalytic oxidation of various VOCs sintultaneously. (c) 2006 Elsevier Ltd. All rights reserved.
语种	英语 ; 英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD ; OXFORD ; THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/26038]
专题	清华大学
推荐引用方式 GB/T 7714	Yang, Rui,Zhang, Yinping,Xu, Qiujian,et al. A mass transfer based method for measuring the reaction coefficients of a photocatalyst[J],2010, 2010.
APA	Yang, Rui,Zhang, Yinping,Xu, Qiujian,&Mo, Jinhan.(2010).A mass transfer based method for measuring the reaction coefficients of a photocatalyst..
MLA	Yang, Rui,et al."A mass transfer based method for measuring the reaction coefficients of a photocatalyst".(2010).

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