Efficient simultaneous removal of diesel particulate matter and hydrocarbons from diesel exhaust gas at low temperatures over Cu–CeO_(2)/Al_(2)O_(3) coupling with dielectric barrier discharge plasma  

作　　者：任保勇 方世玉 张甜甜 孙燕 高尔豪 李晶 吴祖良 朱佳丽 王伟 姚水良 Baoyong REN;Shiyu FANG;Tiantian ZHANG;Yan SUN;Erhao GAO;Jing LI;Zuliang WU;Jiali ZHU;Wei WANG;Shuiliang YAO(School of Safety Science and Engineering,Changzhou University,Changzhou 213164,People’s Republic of China;School of Environmental Science and Engineering,Changzhou University,Changzhou 213164,People’s Republic of China;Key Laboratory of Advanced Plasma Catalysis Engineering for China Petrochemical Industry,Changzhou 213164,People’s Republic of China)

机构地区：[1]School of Safety Science and Engineering,Changzhou University,Changzhou 213164,People’s Republic of China [2]School of Environmental Science and Engineering,Changzhou University,Changzhou 213164,People’s Republic of China [3]Key Laboratory of Advanced Plasma Catalysis Engineering for China Petrochemical Industry,Changzhou 213164,People’s Republic of China

出　　处：《Plasma Science and Technology》2024年第5期100-109,共10页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China(nos 12075037 and 22206013)。

摘　　要：Diesel particulate matter(DPM)and hydrocarbons(HCs)emitted from diesel engines have a negative affect on air quality and human health.Catalysts for oxidative removal of DPM and HCs are currently used universally but their low removal efficiency at low temperatures is a problem.In this study,Cu-doped CeO_(2) loaded on Al_(2)O_(3) coupled with plasma was used to enhance low-temperature oxidation of DPM and HCs.Removals of DPM and HCs at 200℃ using the catalyst were as high as 90%with plasma but below 30%without plasma.Operando plasma diffuse reflectance infrared Fourier transform spectroscopy coupled with mass spectrometry was conducted to reveal the functional mechanism of the oxygen species in the DPM oxidation process.It was found that Cu-CeO_(2) can promote the formation of adsorbed oxygen(M^(+)-O_(2)^(-))and terminal oxygen(M=O),which can react with DPM to form carbonates that are easily converted to gaseous CO_(2).Our results provide a practical plasma catalysis technology to obtain simultaneous removals of DPM and HCs at low temperatures.M+O-2Diesel particulate matter(DPM)and hydrocarbons(HCs)emitted from diesel engines have a negative affect on air quality and human health.Catalysts for oxidative removal of DPM and HCs are currently used universally but their low removal efficiency at low temperatures is a problem.In this study,Cu-doped CeO_(2) loaded on Al_(2)O_(3) coupled with plasma was used to enhance low-temperature oxidation of DPM and HCs.Removals of DPM and HCs at 200°C using the catalyst were as high as 90%with plasma but below 30%without plasma.Operando plasma diffuse reflectance infrared Fourier transform spectroscopy coupled with mass spectrometry was conducted to reveal the functional mechanism of the oxygen species in the DPM oxidation process.It was found that Cu–CeO_(2) can promote the formation of adsorbed oxygen(–)and terminal oxygen(M=O),which can react with DPM to form carbonates that are easily converted to gaseous CO_(2).Our results provide a practical plasma catalysis technolog

关 键 词：diesel PM plasma catalysis Cu-CeO_(2)/Al_(2)O_(3) DRIFTS-MS synergy effect 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程] O539[理学—等离子体物理]