Catalytic degradation of gaseous chlorobenzene via DBD plasma combined with cerium/siderite composite

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), Sept.2025, Vol.48 No.9: 1228-1233

DOI: 10.3969/j.issn.1003-5060.2025.09.012

Authors

ZHENG Xiaoqiang $ ^{1,2} $, ZHU Chengzhu $ ^{1,2} $, WANG Pan $ ^{1,2} $, WU Wenjuan $ ^{1,2} $, MA Meng $ ^{1,2} $

(1, School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China; 2. Institute of Atmospheric Environment and Pollution Control, Hefei University of Technology, Hefei 230009, China)

Abstract and Keywords

Abstract: In this paper, a composite catalyst of cerium(Ce) and siderite(Sid) was prepared by impregnation method using Sid as the material to catalyze the degradation of gaseous chlorobenzene with dielectric barrier discharge(DBD) plasma. The Ce/Sid composite catalyst was characterized by X-ray diffraction(XRD), scanning electron microscope(SEM) and BET surface area analyzer. The effects of process parameters(initial mass concentration, applied voltage, and gas flow rate) on the removal efficiency and energy yield of gaseous chlorobenzene were investigated. The results showed that the prepared Ce/Sid composite catalyst had the best effect on the catalytic degradation of gaseous chlorobenzene with DBD when the mass ratio of Ce to Sid was 0.6 and the calcination temperature was 500°C. When the initial mass concentration of chlorobenzene was 190 mg/m³, the gas flow rate was 0.7 m³/h and the applied voltage was 7 kV, compared with the DBD system alone, the degradation efficiency and mineralization rate in the Ce/Sid/DBD catalytic system increased by 26.45% and 16.20%, respectively, and the ozone mass concentration decreased by 65.02%.

Keywords: dielectric barrier discharge(DBD); chlorobenzene; cerium; siderite; catalytic degradation

作者信息

郑晓强 $ ^{1,2} $，朱承驻 $ ^{1,2} $，汪盼 $ ^{1,2} $，吴文娟 $ ^{1,2} $，马萌 $ ^{1,2} $

(1. 合肥工业大学资源与环境工程学院，安徽合肥 230009；2. 合肥工业大学大气环境与污染控制工程研究所，安徽合肥 230009)

摘要和关键词

摘要: 文章以菱铁矿(siderite, Sid)为材料, 采用浸渍法制备铈(Ce)和菱铁矿复合催化剂, 并协同介质阻挡放电(dielectric barrier discharge, DBD)等离子体催化降解气态氯苯, 通过X射线衍射(X-ray diffraction, XRD)仪、扫描电子显微镜(scanning electron microscope, SEM)和BET表面分析仪对Ce/Sid复合催化剂进行表征, 研究工艺参数(初始质量浓度、外施电压、气体流速)对于气态氯苯去除效率和能量产率的影响。结果表明: 当Ce与Sid的质量比为0.6, 煅烧温度为500℃时, 制备的Ce/Sid复合催化剂协同DBD等离子体催化降解气态氯苯具有最佳效果; 当氯苯初始质量浓度为190 mg/m³, 气体流速为0.7 m³/h, 外施电压为7 kV时, 与单独DBD系统相比, Ce/Sid/DBD催化系统中的降解效率和矿化率分别提高26.45%和16.20%, 臭氧质量浓度降低65.02%。

关键词: 介质阻挡放电(DBD)；氯苯；铈；菱铁矿；催化降解

Funding

合肥市关键共性技术研发资助项目（2021GJ064）

合肥工业大学学报(自然科学版)

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