Removal of dimethyl sulfide by post-plasma catalysis over CeO2-MnOx catalysts and reaction mechanism analysis

被引：8
|
作者：
Hu, Lu [1 ,3 ]
Jiang, Nan [1 ,2 ,3 ]
Peng, Bangfa [2 ]
Liu, Zhengyan [1 ,3 ]
Li, Jie [1 ,2 ,3 ]
Wu, Yan [1 ,2 ,3 ]
机构：
[1] Dalian Univ Technol, Key Lab Ind Ecol & Environm Engn, Minist Educ, Dalian 116024, Peoples R China
[2] Dalian Univ Technol, Sch Elect Engn, Dalian 116024, Peoples R China
[3] Dalian Univ Technol, Sch Environm Sci & Technol, Dalian 116024, Peoples R China
来源：
CHEMOSPHERE | 2021年 / 274卷 / 274期
基金：
中国国家自然科学基金;
关键词：
Post-plasma catalysis; Dimethyl sulfide removal; CeO2-MnOx catalysts; Volatile organic sulfur compounds (VOSCs); Mixed oxides; CO OXIDATION; OXIDES; PERFORMANCE; TOLUENE; DECOMPOSITION; BENZENE; SO2; FORMALDEHYDE; DEGRADATION; COMBUSTION;
D O I：
10.1016/j.chemosphere.2021.129910
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The combination of a multistage rod plasma reactor and post CeO2-MnOx catalysts is studied to treat dimethyl sulfide (DMS). The physicochemical properties of all catalysts and the effect of the catalytic performance of CeO2-MnOx catalysts on DMS removal efficiency are studied. Placing CeO2-MnOx catalysts after the non-thermal plasma system can improve the capability of DMS degradation. The results exhibit that CeO2-MnOx (1:1) catalyst presents a higher catalytic activity than that of CeO2, MnOx, CeO2-MnOx (1:0.5) and CeO2-MnOx (1:3). At the power of 21.7 W, the combination of dielectric barrier discharge and CeO2-MnOx (1:1) catalyst could improve the DMS removal efficiency and CO2 selectivity by 16.2% and 18.2%, respectively. This result maybe closely related with its specific surface area, redox properties and oxygen mobility. In addition, the degradation mechanism of DMS over CeO2-MnOx catalysts is proposed. Finally, the stability of the CeO2-MnOx (1:1) catalyst is investigated, and the reason for the decreased activity of the used catalyst is analyzed. (C) 2021 Elsevier Ltd. All rights reserved.
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页数：10
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