燃料化学学报（中英文）2026，Vol.54Issue(8)：206-219,14.DOI:10.1016/S1872-5813(26)60690-1
非平衡等离子体作用下CH4裂解特性及其反应机理分析
Reaction mechanisms and cracking performance of CH4 provoked by non-equilibrium plasma
摘要
Abstract
Methane cracking driven by electric power holds significant promise in the context of the rapid development of renewable energy.The effects of carrier gas ratio,input power,and inlet gas flow rate on CH4 cracking performance were systematically investigated in a dielectric barrier discharge(DBD)reactor.The variation of temperature distribution and reaction energy intensity were also examined.The experimental results indicate that CH4 conversion and gaseous product formation are promoted by increasing the DBD input power or decreasing the inlet gas flow rate.At an input power of 90 W and an inlet gas flow rate of 200 mL/min,the single-pass CH4 conversion reach 46.6％,with an H2 yield of 23.3％,demonstrating that CH4 cracking is governed by electron induced.While the Joule heating from the inner and outer electrodes is relatively limited.The reaction energy intensity increases as the CH4 conversion decreases.When the inlet gas flow rate increases from 200 to 800 mL/min,the energy intensity rises by approximately 2.8 times,indicating that higher inlet gas flow rates enhance the convective heat transfer and shorten the gas residence time,thereby suppressing deep CH4 cracking.Moreover,BOLSIG+calculations further reveal that CH4 activation is dominated by electron induced vibrational excitation,in which stepwise energy accumulation drives C-H bond dissociation.The energy transfer and species transformation pathways of overall CH4 cracking process,which comprises electron energy injection,vibrational excitation,stepwise dissociation,radical chain extension,and final product formation,can be summarized into three stages,i.e.methane activation,radical evolution,and product formation.关键词
CH4裂解/非平衡等离子体/反应特性/机理探索Key words
methane cracking/non-equilibrium plasma/reaction performance/mechanism exploration分类
化学化工引用本文复制引用
孙翼娉,赵军宁,张圆圆,张锴,张东柯..非平衡等离子体作用下CH4裂解特性及其反应机理分析[J].燃料化学学报（中英文）,2026,54(8):206-219,14.基金项目
Supported by the National Natural Science Foundation of China(U1910215),Key Research and Development Program of Shanxi Province(202502090301002)and the Programme of Introducing Talents of Discipline to Universities(B12034). （U1910215）
