间甲酚臭氧化反应动力学研究

摘要本文采用停流光谱仪研究了溶解臭氧和间甲酚在液相中的均相反应动力学,探讨了反应温度为298K和pH值在3～7范围内,间甲酚臭氧化反应的动力学参数。间甲酚臭氧化总的反应呈二级,对臭氧浓度和间甲酚浓度分别呈一级。臭氧化反应速率常数随溶液pH值的增大而增大,在T为298K时,当pH值从3变化到7,总的反应速率常数从6 28×103(mol L)-1·s-1增大到9 15×105(mol L)-1·s-1。

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	沈慧芳
	程江
	陈焕钦

关键词：臭氧化间甲酚动力学反应速率常数

Abstract： A stopped-flow spectrophotometer system was applied to study the kinetics of the ozonation between dissolved ozone and m -cresol in aqueous solution under the condition T =298K and pH values varying from 3 to 7. The overall ozonation reaction of m -cresol was found to be second order and be first order in each reactant concentration respectively. The ozonation rate constant of m -cresol increased rapidly with the solution pH. With a fixed concentration (0.001M) of m -cresol,as the pH value increased from 3 to 7, the overall rate constant increased from 6.28×10~3 (mol/L)~(-1)·s~(-1) to 9.15×10~5 (mol/L)~(-1)·s~(-1) at 298K.

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Received 2004-05-15; published 2004-05-15

引用本文:

沈慧芳,程江,陈焕钦.间甲酚臭氧化反应动力学研究[J]. 化学工业与工程, 2004,21(3): 157-160

SHEN Hui-fang,CHENG Jiang,CHEN Huan-qin .Kinetics of Ozonation of m -Cresol in Aqueous Solutions[J]. Chemcial Industry and Engineering, 2004,21(3): 157-160