软锰矿催化氧化二氧化硫的过程与机理研究  

Process and Mechanism of Catalyzed Oxidation of SO_2 with Pyrolusite Slurry

作　　者：汤争光 蒋文举[2] 

机构地区：[1]西南电力设计院,四川成都610021 [2]四川大学建筑与环境学院,四川成都610065

出　　处：《环境科学与技术》2008年第2期13-15,37,共4页Environmental Science & Technology

基　　金：国家自然科学基金资助项目(50278059)

摘　　要：通过实验室模拟废气脱硫实验,研究了软锰矿浓度、氧含量、废气流量、SO2浓度和操作温度对脱硫成酸的影响,结果表明:低浓度软锰矿浓度对废气中SO2发生显著的催化氧化作用,当软锰矿浓度>500mg/L时,脱硫效率可达80%。氧对软锰矿催化氧化SO2发挥了重要作用,应>10%。废气流量和进口SO2浓度对成酸作用影响较小,操作温度为60℃最好。软锰矿催化脱硫的机理分析表明,过程是液相Mn、Fe协同催化与固相催化作用相结合。Effect of pyrolusite slurry, O2, flow of waste gas, concentration of SO2 and temperature on catalyzed desulfurization was studied. Results showed that low concentration pyrolusite slurry had strong catalysis oxidation of SO2 from waste gas. Removal efficiency of SO2 was over 80% at 500mg/L of pyrolusite. Oxygen with concentration above 10% played an important role in catalyzed reaction. Flow rate of waste gas and concentration of SO2 had little effect on oxidation of SO2, with optimum temperature around 60℃. Mechanism of catalyzed oxidation of SO2 with pyrolusite suggested that the process was combined catalysis in the presence of Mn and Fe both in solution and solid.

关 键 词：软锰矿 二氧化硫 催化氧化 

分 类 号：X131.1[环境科学与工程—环境科学]