摘要
液相放电等离子体技术可突破传统热化学路径的限制,在常温常压下实现液态燃料的快速在线分解制氢。本研究设计了一种基于多孔镍材料的新型高压电极,搭建了可视化放电实验平台,系统开展了甲醇液相放电分解制氢过程的特性研究,重点分析了放电、气泡行为、能质传递特性及其对制氢性能的影响。实验结果表明,多孔电极显著增大了滑动弧放电等离子体气泡体积,并改善了放电通道的时空分布,从而有效提升了甲醇与等离子体间的反应界面与传质效率。与传统针电极相比,采用多孔电极后产氢速率提升至791.6 ml/min,增长38%;单位产氢能耗降低至1.45 kWh/m^(3)H_(2),降幅达33.78%。在长周期运行过程中,多孔电极体系的甲醇分解性能衰减率较传统系统降低超过72%,展现出优异的运行稳定性与寿命特性。研究结果为液相等离子体制氢反应器的高效化、稳定化设计提供了理论依据与关键技术支撑。
Liquid-phase discharge plasma technology can break through the limitations of the traditional thermochemical pathway and realize rapid on-line decomposition of liquid fuels for hydrogen production at ambient temperature and pressure.In this study,a new high-voltage electrode based on porous nickel material was designed,and a visual discharge experimental platform was constructed to systematically carry out the characterization of methanol liquid-phase discharge plasma decomposition for hydrogen production,focusing on the analysis of the discharge mode,the bubble behavior,the energy-mass transfer characteristics and their effects on the hydrogen production performance.The experimental results show that in the sliding arc discharge mode,the use of porous electrodes significantly increases the plasma bubble volume and improves the spatial and temporal distribution of the discharge channel,which effectively enhances the reaction interface between methanol and plasma and the mass transfer efficiency.Compared with the traditional needle electrode,the use of porous electrodes increased the hydrogen production rate to 791.6 ml/min,a 38%increase.The unit energy consumption for hydrogen production was reduced to 1.45 kWh/m^(3)H_(2),a 33.78%decrease.During the long cycle operation,the methanol decomposition performance decay rate of the porous electrode system was reduced by more than 72%compared with the traditional system,showing excellent operational stability and lifetime characteristics.The results provide a theoretical basis and key technical support for the design of liquid-phase plasma hydrogen generation reactor with high efficiency and stability.
作者
双舒炎
张伟
王家乐
王军锋
SHUANG Shuyan;ZHANG Wei;WANG Jiale;WANG Junfeng(School of Energy and Power Engineering,Jiangsu University,Zhenjiang 212013,Jiangsu,China;School of Energy and Power Engineering,Chongqing University,Chongqing 400044,China)
出处
《化工学报》
北大核心
2025年第11期5753-5763,共11页
CIESC Journal
基金
国家自然科学基金项目(52436005,52206201)。
关键词
制氢
甲醇
多孔电极
液相放电等离子体
气泡行为
hydrogen production
methanol
porous electrodes
liquid-discharge plasma
bubble behavior
