苯酚抑制条件下亚硫酸盐氧化的本征反应动力学  

Intrinsic Kinetics of Sulfite Oxidation with Inhibitor of Phenol

作　　者：汪黎东[1,2] 赵毅[1] 马永亮[2] 郝吉明[2] 

机构地区：[1]华北电力大学环境科学与工程学院,保定071003 [2]清华大学环境科学与工程系,北京100084

出　　处：《化学学报》2008年第21期2336-2340,共5页Acta Chimica Sinica

基　　金：863重点项目(No.2007AA061703);中国博士后基金项目(No.20080430398);华北电力大学博士基金项目(No.200612008)资助项目

摘　　要：亚硫酸盐的氧化是湿法烟气脱硫工艺中的重要过程.利用间歇式反应装置,研究了苯酚抑制条件下亚硫酸盐氧化的本征反应动力学.结果表明,该复杂的反应过程分两个阶段进行,即富氧区的快速反应和贫氧区的慢速反应.在富氧区,苯酚、亚硫酸盐和溶解氧的分级数分别为-0.5,1.0和2.0,反应的表观活化能为99.2kJ·mol-1;在贫氧区,苯酚、亚硫酸盐和溶解氧的分级数分别为-0.5,1.5和0,反应的表观活化能为129.7kJ·mol-1.结合实验结果,对苯酚抑制条件下亚硫酸盐氧化的宏观反应动力学过程进行了推断.Oxidation of sulfite is an important process in wet flue gas desulfurization. The intrinsic kinetics of sulfite oxidation with inhibitor of phenol was experimentally studied in an intermittent apparatus, indicating that the complicated reaction proceeded with two steps, a rapid reaction in rich oxygen zone and a slow reaction in poor oxygen zone. In the rich oxygen zone, the reaction order is --0.5 for phenol, 1.0 for sulfite, and 2.0 for dissolved oxygen, and the activation energy is 99.2 kJ·mol^-1. In the poor oxygen zone, the reaction order is --0.5 for phenol, 1.5 for sulfite, and 0.0 for dissolved oxygen, and the activation energy is 129.7 kJ·mol^-1. Integrated with the experimental results, the macroscopical kinetics of sulfite oxidation with the inhibitor of phenol was deduced.

关 键 词：苯酚 亚硫酸盐 氧化 抑制 动力学 

分 类 号：X701.3[环境科学与工程—环境工程]