等离子体协同催化降解VOCs过程中O3的作用机理

doi:10.16085/j.issn.1000-6613.2017-1578

化工进展 ›› 2018, Vol. 37 ›› Issue (07): 2649-2654.DOI: 10.16085/j.issn.1000-6613.2017-1578

等离子体协同催化降解VOCs过程中O₃的作用机理

鲁美娟^1,2, 杨文亭³, 喻成龙², 吴军良¹, 叶代启¹

1 华南理工大学环境与能源学院, 广东广州 510006;
2 江西农业大学国土资源与环境学院, 江西南昌 330045;
3 江西农业大学农学院, 江西南昌 330045

收稿日期:2017-07-31 修回日期:2017-11-17 出版日期:2018-07-05 发布日期:2018-07-05
通讯作者: 叶代启,教授,研究方向为VOCs的非热等离子体及催化净化技术。
作者简介:鲁美娟(1983-),女,博士,讲师。
基金资助:
国家自然科学基金项目（51508245，U1201231，21403093，51678245）。

Role of O₃ during the plasma-catalytic oxidation of VOCs

LU Meijuan^1,2, YANG Wenting³, YU Chenglong², WU Junliang¹, YE Daiqi¹

1 College of Environment and Energy, South China University of Technology, Guangzhou 510006, Guangdong, China;
2 School of Environmental and Land Resource Management, Jiangxi Agricultural University, Nanchang 330045, Jiangxi, China;
3 School of Agricultural Sciences, Jiangxi Agricultural University, Nanchang 330045, Jiangxi, China

Received:2017-07-31 Revised:2017-11-17 Online:2018-07-05 Published:2018-07-05

摘要/Abstract

摘要： 等离子体协同催化降解挥发性有机化合物（volatile organic compounds，VOCs）过程中，O₃的产生是不可避免的。为研究此过程中的O₃对VOCs降解的影响，本文将不同类型的催化剂（SBA-15、FeO_x/SBA-15、FeO_x-AgO_x/SBA-15）分别置于等离子体区域中和区域后，测定了甲苯降解过程中O₃产生量的变化以及催化剂对甲苯降解的影响。研究结果表明，不同类型的催化剂在等离子体区域中均能使O₃和ΔO₃值显著增加，而在等离子体区域后，O₃产生量比催化剂置于等离子体区域中有一定程度的降低，但与空管相比差别不大，而甲苯降解效率显著提高，CO₂选择性显著降低。在单独等离子体条件下，随着甲苯浓度的升高，O₃呈现逐步升高的趋势。加入催化剂后，在甲苯浓度为410mg/m³和615mg/m³时，O₃产生量较单独等离子体显著升高，但随着甲苯浓度的增加，不同催化剂对O₃的产生量影响不大。

关键词: 非热等离子体, 甲苯催化氧化, O₃作用机理

Abstract: The emergence of O₃ was inevitable during the VOCs oxidation by plasma assisted catalysis. In order to study the mechanism of VOCs oxidation with the formation of O₃ byproduct during plasma, different catalysts (SBA-15, FeO_x/SBA-15, FeO_x-AgO_x/SBA-15) were placed inside and outside the plasma zone, and then the O₃ concentration was measured and the effect of the catalysts on the toluene degradation was studied. The results showed that the O₃ and ΔO₃ were significantly increased when the catalysts were put inside the plasma zone, while the O₃ concentration decreased when the catalysts were put outside the plasma zone, close to the case of bare plasma. The toluene removal efficiency improved, and the CO₂ selectivity decreased. At the same time, O₃ concentration gradually decreased with the increase of toluene concentration when only plasma were used. However, when the catalysts were put inside the plasma zone, the O₃ concentration increased under the toluene concentration of 410mg/m³ and 615mg/m³, but the catalysts has little effect on the O₃ concentration when the toluene concentration further increased.

Key words: non-thermal plasma, toluene catalysis oxidation, mechanism of O₃ role

中图分类号:

X511

鲁美娟, 杨文亭, 喻成龙, 吴军良, 叶代启. 等离子体协同催化降解VOCs过程中O₃的作用机理[J]. 化工进展, 2018, 37(07): 2649-2654.

LU Meijuan, YANG Wenting, YU Chenglong, WU Junliang, YE Daiqi. Role of O₃ during the plasma-catalytic oxidation of VOCs[J]. Chemical Industry and Engineering Progress, 2018, 37(07): 2649-2654.

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等离子体协同催化降解VOCs过程中O₃的作用机理

Role of O₃ during the plasma-catalytic oxidation of VOCs

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