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Efficient activation of the co/sba-15catalyst by high-frequency AC-DBD plasma thermal effects for toluene removal

Plasma Science and Technology 2024年第8期26卷 84-94页

作者：李越姜楠刘政妍秦亮彭邦发王荣刚孙玉荣李杰 School of Environment Dalian University of TechnologyDalian 116024People’s Republic of China School of Electrical Engineering Dalian University of TechnologyDalian 116024People’s Republic of China college of Electrical and Power Engineering Taiyuan University of TechnologyTaiyuan 030024People’s Republic of China Canmax Technologies co. Ltd.Suzhou 215121People’s Republic of China

Dielectric barrier discharge(DBD)plasma excited by a high-frequency alternating-current(AC)power supply is widely employed for the degradation of volatile organic compounds(VOCs).However,the thermal effect generated during the discharge process leads to energy waste and low energy utilization *** this work,an innovative DBD thermally-conducted catalysis(DBD-TCC)system,integrating high-frequency AC-DBD plasma and its generated thermal effects to activate the co/sba-15 catalyst,was employed for toluene ***,co/sba-15 catalysts are closely positioned to the ground electrode of the plasma zone and can be heated and activated by the thermal effect when the voltage exceeds 10 k ***12.4 k V,the temperature in the catalyst zone reached 261℃ in the DBD-TCC system,resulting in an increase in toluene degradation efficiency of 17%,co_(2)selectivity of 21.2%,and energy efficiency of 27%,respectively,compared to the DBD system *** contrast,the DBD thermally-unconducted catalysis(DBD-TUC)system fails to enhance toluene degradation due to insufficient heat absorption and catalytic activation,highlighting the crucial role of AC-DBD generated heat in the activation of the ***,the degradation pathway and mechanism of toluene in the DBD-TCC system were *** work is expected to provide an energy-efficient approach for high-frequency AC-DBD plasma removal of VOCs.

关键词： high-frequency alternating-current power thermal effect dielectric barrier discharge toluene degradation co/sba-15 catalysts

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