二甲苯废气的非均相催化氧化工艺研究  

Research on Heterogeneous Catalytic Oxidation of VOCs

作　　者：赵翊强 牛少帅 徐晓龙 程家骥 刘猛 李少香[1] Zhao Yiqiang;Niu Shaoshuai;Xu Xiaolong;Cheng Jiaji;Liu Meng;Li Shaoxiang(College of Environmental and Safety Engineering,Qingdao University of Science and Technology,Qingdao 266042,China;Shandong Furi Xuanwei New Material Technology Co.,Ltd.,Weifang 261507,China)

机构地区：[1]青岛科技大学环境与安全工程学院,山东青岛266042 [2]山东孚日宣威新材料科技有限公司,山东潍坊261507

出　　处：《山东化工》2022年第19期1-4,共4页Shandong Chemical Industry

基　　金：山东省重大科技创新工程项目(2019JZZY010821)。

摘　　要：以二甲苯为挥发性有机物的代表,采用非均相催化氧化技术对二甲苯废气进行处理。通过调节过氧化氢浓度、催化剂高度、铁离子浓度的比例及改变pH值,研究了非均相催化剂在芬顿体系去除挥发性有机物的应用。通过正交试验得出,最佳的工艺条件为:铁离子浓度1 mmol/L、催化剂填装高度80 cm、过氧化氢浓度20 mmol/L、pH值=3。在最佳条件下,进行了长达12 h的连续化实验,实验结果表明:该催化剂可以降低亚铁离子用量;随着时间的不断延长,相同过氧化氢浓度下的溶液对二甲苯的去除率呈下降趋势;12 h的实验中,过氧化氢的浓度≥10 mmol/L时,二甲苯的去除效率≥70%。Taking xylene as the representative of volatile organic compounds,the xylene exhaust gas is treated by heterogeneous catalytic oxidation technology.By adjusting the hydrogen peroxide concentration,catalyst height,ratio of iron ion concentration and changing pH,the application of heterogeneous catalysts for the removal of VOC in Fenton systems was studied.Through orthogonal experiments,the optimal process conditions are:iron ion concentration of 1 mmol/L,catalyst filling height of 80 cm,hydrogen peroxide concentration of 20 mmol/L,pH value = 3.Under the optimal conditions,continuous experiments were carried out for12 h.The results showed that the catalyst could reduce the amount of ferrous ion.With the extension of time,the removal rate of xylene in the solution with the same concentration of hydrogen peroxide decreases.In the 12 h experiment,when the concentration of hydrogen peroxide was ≥10 mmol/L,the removal efficiency of xylene was ≥70%.

关 键 词：非均相催化 芬顿试剂 正交试验 二甲苯 连续化实验 

分 类 号：TQ032[化学工程]