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

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外文摘要：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 efficiency.In 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 removal.Specifically,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 kV.At 12.4 kV,the temperature in the catalyst zone reached 261 ℃ in the DBD-TCC system,resulting in an increase in toluene degradation efficiency of 17％,CO2 selectivity of 21.2％,and energy efficiency of 27％,respectively,compared to the DBD system alone.In 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 catalyst.Furthermore,the degradation pathway and mechanism of toluene in the DBD-TCC system were hypothesized.This work is expected to provide an energy-efficient approach for high-frequency AC-DBD plasma removal of VOCs.

外文关键词：

high-frequency alternating-current powerthermal effectdielectric barrier dischargetoluene degradationCo/SBA-15 catalysts

作者：

李越、姜楠、刘政妍、秦亮、彭邦发、王荣刚、孙玉荣、李杰

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作者单位：

School of Environment,Dalian University of Technology,Dalian 116024,People's Republic of China

School of Electrical Engineering,Dalian University of Technology,Dalian 116024,People's Republic of China

College of Electrical and Power Engineering,Taiyuan University of Technology,Taiyuan 030024,People's Republic of China

Canmax Technologies Co.,Ltd.,Suzhou 215121,People's Republic of China

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出版年：

2024

DOI：

10.1088/2058-6272/ad47db

等离子体科学和技术(英文版)

中国科学院合肥物质科学研究所中国力学学会

等离子体科学和技术(英文版)

影响因子：0.297

ISSN：1009-0630

年,卷(期)：2024.26(8)