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

Lu Hu; Nan Jiang; Bangfa Peng; Zhengyan Liu; Jie Li; Yan Wu

doi:10.1016/j.chemosphere.2021.129910

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

Chemosphere. 2021 Jul:274:129910. doi: 10.1016/j.chemosphere.2021.129910. Epub 2021 Feb 15.

Authors

Lu Hu¹, Nan Jiang², Bangfa Peng³, Zhengyan Liu¹, Jie Li⁴, Yan Wu⁵

Affiliations

¹ Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), Dalian University of Technology, Dalian, 116024, China; School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China.
² Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), Dalian University of Technology, Dalian, 116024, China; School of Electrical Engineering, Dalian University of Technology, Dalian, 116024, China; School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China. Electronic address: jiangnan@dlut.edu.cn.
³ School of Electrical Engineering, Dalian University of Technology, Dalian, 116024, China.
⁴ Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), Dalian University of Technology, Dalian, 116024, China; School of Electrical Engineering, Dalian University of Technology, Dalian, 116024, China; School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China. Electronic address: lijie@dlut.edu.cn.
⁵ Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), Dalian University of Technology, Dalian, 116024, China; School of Electrical Engineering, Dalian University of Technology, Dalian, 116024, China; School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China.

PMID: 33979912
DOI: 10.1016/j.chemosphere.2021.129910

Abstract

The combination of a multistage rod plasma reactor and post CeO₂-MnO_x catalysts is studied to treat dimethyl sulfide (DMS). The physicochemical properties of all catalysts and the effect of the catalytic performance of CeO₂-MnO_x catalysts on DMS removal efficiency are studied. Placing CeO₂-MnO_x catalysts after the non-thermal plasma system can improve the capability of DMS degradation. The results exhibit that CeO₂-MnO_x (1:1) catalyst presents a higher catalytic activity than that of CeO₂, MnO_x, CeO₂-MnO_x (1:0.5) and CeO₂-MnO_x (1:3). At the power of 21.7 W, the combination of dielectric barrier discharge and CeO₂-MnO_x (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-MnO_x catalysts is proposed. Finally, the stability of the CeO₂-MnO_x (1:1) catalyst is investigated, and the reason for the decreased activity of the used catalyst is analyzed.

Keywords: CeO(2)-MnO(x) catalysts; Dimethyl sulfide removal; Mixed oxides.; Post-plasma catalysis; Volatile organic sulfur compounds (VOSCs).

MeSH terms

Catalysis
Cerium*
Oxidation-Reduction
Oxides*
Sulfides

Substances

Oxides
Sulfides
Cerium
dimethyl sulfide