低碳化学与化工2025，Vol.50Issue(11)：1-12,12.DOI:10.12434/j.issn.2097-2547.20250057
介质阻挡放电等离子体催化甲烷无氧偶联的影响因素优化研究
Study on optimization of influencing factors of anaerobic methane coupling catalyzed by dielectric barrier discharge plasma
摘要
Abstract
Anaerobic methane(CH4)coupling catalyzed by dielectric barrier discharge(DBD)plasma is a significant pathway for the efficient conversion of CH4 into high-value hydrocarbons(such as C2 hydrocarbons).However,its reaction efficiency is influenced by multiple factors.Through a series of experiments,the effects of key parameters such as discharge power,temperatures,total gas flow rates,auxiliary gas types and contents(volume fraction,the same below)on CH4 conversion rates and C2 hydrocarbon selectivities were systematically investigated.The experimental results indicate that total gas flow rate is a critical parameter for controlling the residence time of reactants.When the total gas flow rate increases,the average residence time of the gas in the plasma region shortens,leading to a decrease in CH4 conversion rate.Auxiliary gas types significantly regulate the reaction pathway.When N2 is used as an auxiliary gas,the CH4 conversion rate is significantly increased by exciting high-energy electrons,and the C2 hydrocarbon selectivity can reach up to 40%.When H2 is used as an auxiliary gas,the CH4 conversion rate decreases,but the C2H6 selectivity increases to more than 90%due to hydrogen radical-mediated hydrogenation reactions.The microscopic morphology of the electrode surface directly affects discharge characteristics.After treating the electrode surface with the 0.10 mol/L lysine solution for one day,the CH4 conversion rate significantly increases compared to untreated electrodes.The synergistic optimization mechanism of these multiple parameters will provide critical design guidelines for the scale-up of plasma-catalytic CH4 conversion reactors and deepen the theoretical understanding of the mechanism in plasma-catalytic systems.关键词
甲烷无氧偶联/介质阻挡放电等离子体/等离子体催化Key words
anaerobic methane coupling/dielectric barrier discharge plasma/plasma catalysis分类
化学化工引用本文复制引用
梁惠民,张荣斌,叶闰平,冯刚..介质阻挡放电等离子体催化甲烷无氧偶联的影响因素优化研究[J].低碳化学与化工,2025,50(11):1-12,12.基金项目
国家自然科学基金(22362022,52267001) （22362022,52267001）
江西省"双高"和"赣鄱俊才"项目(20232BCJ25082) （20232BCJ25082）
江西省"双千计划"(jxsq2023101072). （jxsq2023101072）
