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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

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Plasma Science and Technology 2024年第5期26卷 100-109页

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 School of Safety Science and Engineering Changzhou UniversityChangzhou 213164People’s Republic of China School of Environmental Science and Engineering Changzhou UniversityChangzhou 213164People’s Republic of China Key Laboratory of Advanced Plasma Catalysis Engineering for China Petrochemical Industry Changzhou 213164People’s Republic of China

diesel particulate matter(Dpm)and hydrocarbons(HCs)emitted from diesel engines have a negative affect on air quality and human *** for oxidative removal of Dpm and HCs are currently used universally but their low removal efficiency at low temperatures is a *** 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 *** of Dpm and HCs at 200℃ using the catalyst were as high as 90%with plasma but below 30%without *** 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 *** 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 *** for oxidative removal of Dpm and HCs are currently used universally but their low removal efficiency at low temperatures is a *** 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 *** of Dpm and HCs at 200°C using the catalyst were as high as 90%with plasma but below 30%without *** 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 *** 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 provi

关键词： diesel pm plasma catalysis Cu-CeO_(2)/Al_(2)O_(3) DRIFTS-MS synergy effect

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