柠檬酸盐法脱除SO_2过程中氧化副反应的动力学研究  

Oxidation Reaction Kinetics of Absorbing SO_2 with Citrate Solution

作　　者：洪涛[1] 高萌[1] HONG Tao GAO Meng(College of Metallurgical Engineering, Xi＇an University of Architecture and Technology, Xi＇an 710055, China)

机构地区：[1]西安建筑科技大学冶金工程学院,西安710055

出　　处：《有色金属（冶炼部分）》2016年第10期63-65,73,共4页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金青年科学基金项目(51104115)

摘　　要：以低浓度二氧化硫柠檬酸盐吸收后液为对象,研究硫酸根生成速率,考察温度、柠檬酸总浓度、pH等因素的氧化副反应,探索氧化副反应机制和抑制方法。研究表明,氧化速率对柠檬酸浓度是0.5级反应,对pH是0.8级反应,对氧是0级反应;控制柠檬酸浓度为1.5mol/L、pH=4.5、反应温度为95℃的条件下进行吸收解吸操作,可以使氧化副反应最小。Absorption solution with low concentration of SO2 was applied as object to study generation rate of sulfate radical and side effects of oxidation under different temperature, citrate total concentration, and pH value. Oxidation mechanisms and its inhibition method were explored. The results show that reaction order of oxidation rate on citric acid concentration, pH value, and oxygen is 0.5, 0.8 and 0 respectively. The minimum secondary oxidation reaction is obtained under the conditions of absorption and desorption including concentration of citric acid of 1.5 mol/L, pH value of 4.5, and reaction temperature of 95 ℃.

关 键 词：二氧化硫 柠檬酸盐法 氧化副反应 动力学 

分 类 号：X701.3[环境科学与工程—环境工程]