化工学报2026，Vol.77Issue(2)：1021-1032,12.DOI:10.11949/0438-1157.20250917
改性KHCO3/CO2协同抑制CH4/H2预混气体爆炸火焰实验研究
Experimental study on synergistic suppression of CH4/H2 premixed gas explosion flame by modified KHCO3/CO2
摘要
Abstract
Hydrogen-blended natural gas pipeline transportation is a key technology for the large-scale and economical utilization of hydrogen energy.However,the presence of hydrogen broadens the explosion limits of the mixed gas,drastically increasing the explosion hazard.To ensure the safe use of methane/hydrogen mixtures,this study employs modified KHCO3 powder and CO2 as explosion suppression agents.Using a 20 L spherical explosion system,we investigate the suppression effects of combined modified KHCO3 powder and CO2 on the explosion flames of methane/hydrogen pre-mixed gases.The results indicate that when the hydrogen blending ratio φ<0.7,CO2 and modified KHCO3 powder synergistically enhance the suppression of methane/hydrogen explosion flames.Conversely,when φ>0.7,the suppression efficacy of these two agents diminishes markedly.At φ=0.7,the combined suppression agents outperform any single agent in hindering the propagation of explosion flames in methane/hydrogen pre-mixed gases.As the volumetric fraction of CO2 increases,the flame kernel tends to float upward,forming an unstable mushroom shape.Additionally,with increasing concentrations of modified KHCO3 powder,the explosion flame color shifts from blue to yellow,and the upward flame propagation speed surpasses that of downward propagation.These findings provide a theoretical basis for the safety management and control of hydrogen-enriched natural gas transportation.关键词
掺氢天然气管道/掺氢比/改性KHCO3粉体/CO2/爆炸火焰传播/协同增效Key words
hydrogen blended natural gas pipeline/hydrogen blending ratio/modified KHCO3 powder/CO2/explosion flame propagation/synergistic effect分类
资源环境引用本文复制引用
罗振敏,张新科,苏彬,孙亚利,刘利涛,周尚勇,王涛,王玉玮..改性KHCO3/CO2协同抑制CH4/H2预混气体爆炸火焰实验研究[J].化工学报,2026,77(2):1021-1032,12.基金项目
国家自然科学基金项目(52304252,52174200) （52304252,52174200）
陕西省教育厅青年创新团队科研计划项目(24JP110) （24JP110）
陕西省重点研发计划项目(2025SF-YBXM-550) （2025SF-YBXM-550）
陕西省榆林市科技计划项目(CXY-2019-139) （CXY-2019-139）
