阳离子红染料的臭氧氧化动力学研究  

Reaction Kinetics of Cationic Red X-GRL Ozonation

作　　者：赵伟荣[1] 史惠祥[1] 汪大翚[1] 

机构地区：[1]浙江大学环境工程系,浙江杭州310027

出　　处：《高校化学工程学报》2005年第1期108-112,共5页Journal of Chemical Engineering of Chinese Universities

摘　　要：在半序批式反应器中,研究了反应温度、pH、起始浓度和气体流量等对阳离子红 X-GRL 染料臭氧氧化的影响。在确定比相界面积、液相传质系数和化学计量比的基础上,运用双膜理论证明了臭氧与阳离子红 X-GRL的反应发生在液相主体、反应处于慢速反应动力学区域。反应动力学速度常数与温度和 pH 的关系为:k = 77505exp(?18062/ RT)[OH?]0.003 (L?mol?1?s?1),反应的活化能为 18.062kJ?mol?1。The reaction between ozone and aqueous solution of Cationic Red X-GRL was investigated by gas absorption experiments in a semi-batch reactor. The experiments were conducted by modifying the gas flow rate, initial dye concentration, temperature and pH. The liquid mass transfer coefficient, the interfacial area and the stoichiometric ratio between ozone and dye were evaluated. A model based on the film theory was used to determine the rate constant and the kinetic regime. The Hatta number of the reaction is between 0.026 and 0.041, which indicates that the reaction occurs in the liquid bulk, corresponding to the slow kinetic regime. The kinetics results obtained support a second order overall reaction, first order with respect to both reactions of ozone and dye. The rate constant was correlated as a function of temperature and pH with activation energy of 18.062 kJ&middotmol-1 by the expression: k = 77505exp (-18062/RT) [OH-]0.003 (L&middotmol-1&middots-1).

关 键 词：阳离子红X-GRL 臭氧氧化 反应动力学:传质 

分 类 号：X703.1[环境科学与工程—环境工程] X791