Investigation on Degradation Path of SF_(6)in Packed-bed Plasma:Effect of Plasma-generated Radicals  

作　　者：Zhaolun Cui Chang Zhou Amin Jafarzadeh Xiaoxing Zhang Peng Gao Licheng Li Yanpeng Hao 

机构地区：[1]School of Electric Power Engineering,South China University of Technology,Guangzhou 510630,China [2]School of Electrical and Electronic Engineering,Hubei University of Technology,Wuhan 430068,China [3]Research group PLASMANT,Department of Chemistry,University of Antwerp,Universiteitsplein 1,BE-2610 Wilrijk-Antwerp,Belgium [4]CSEE

出　　处：《CSEE Journal of Power and Energy Systems》2024年第3期1231-1241,共11页中国电机工程学会电力与能源系统学报（英文）

基　　金：supported by National Natural Science Foundation of China(Grant No.52207155).

摘　　要：SF_(6)degradation mechanism in non-thermal plasma(NTP)systems is not fully understood due to the formation of a complex physico-chemical reaction network,especially when reactive gases and packing materials are involved.In this work,we conduct a combined experimental and theoretical study to unravel the SF_(6)degradation path in a-Al_(2)O_(3)packed plasma in the presence of H_(2)O or O_(2).Our experimental results show that both H_(2)O and O_(2)have a synergetic effect with-Al_(2)O_(3)packing on promoting SF_(6)degradation,leading to higher stable gas yields than typical spark or corona discharges.H_(2)O or O_(2)addition promotes SO_(2)or SO_(2)F_(2)selectivity,respectively.Density functional theory(DFT)calculations reveal that SO_(2)generation corresponding with the highest activation barrier is the most critical step toward SF_(6)degradation.Radicals like H and O generated from H_(2)O or O_(2)discharge can significantly promote the degradation process via Eley-Rideal mechanism,affecting key reactions of stable product generation,advancing degradation efficiency.The results of this work could provide insights on further understanding SF_(6)degradation mechanism especially in packed-bed plasma systems.

关 键 词：Degradation mechanism packed-bed plasma RADICALS SF_(6) 

分 类 号：O64[理学—物理化学]