FeMnO_x和等离子体对苯的协同降解

SYNERGY OF FeMnO_X AND PLASMA FOR THE REMOVAL OF BENZENE

为提高介质阻挡放电对空气中苯的降解效率,以硫酸锰和过硫酸铵为原料,采用水热法制备出β-MnO_2载体,并用浸渍烧结法制备出FeMnO_x复合型催化剂。结合等离子体对模拟空气中的苯进行了降解研究,分析了β-MnO_2和FeMnO_x在不同条件下对苯的降解率的影响。结果表明,FeMnO_x复合型催化剂与等离子体结合能有效提高模拟空气中苯的降解率和二氧化碳选择比;苯的降解率和二氧化碳选择比随功率的增加而增加,但随气体流速的增加而减少。苯的降解率可达到73.4%,二氧化碳选择比升至86.5%。

To improve the degradation capability of the dielectric barrier discharge technology on benzene,using sul-fate and ammonium persulphate as raw materials,β-MnO2 are prepared by hydrothermal method,FeMnOx catalyst are pre-pared by impregnation method,and used to degrade the benzene in the simulated air combined with plasma.The effects ofβ-MnO2 and FeMnOx on the different conditions was evaluated. The result indicates that the degradation ratio of benzene and the selectivity of carbon dioxide are improved when the plasma degradation and manganese dioxide catalytic degrada-tion are simultaneously used,the degradation efficiency of benzene and the selectivity of carbon dioxide are both improved with the increasing of power,but decrease with the increasing of gas velocity.The degradation ratio of benzene increases to 73.4%and the selectivity of carbon dioxide grows up to 86.5%.