You Chengxu, Yang Songping, Wei Chengcai
Chongqing Vocational Institute of Safety Technology, No. 583 Anqing Rd, Chongqing 404121, P. R. China.
School of Resources and Safety Engineering, Chongqing University, Chongqing 400044, P. R. China.
ACS Omega. 2025 Feb 17;10(8):7989-7998. doi: 10.1021/acsomega.4c08907. eCollection 2025 Mar 4.
With the advancement of hydrogen energy, hydrogen-blended fuels have gained widespread application in industrial and energy sectors, drawing significant attention to the explosion characteristics and safety risks associated with hydrogen/propane (H/CH) gas mixtures. To effectively mitigate these explosion risks, this study investigates the inerting effects of various nitrogen (N) and carbon dioxide (CO) dilution ratios on H/CH gas mixtures. The CHEMKIN-Pro software was employed to simulate the explosion and inerting properties of these mixtures, analyzing parameters such as adiabatic explosion pressure, flame temperature, concentrations of key radicals, heat release rate, and sensitivity of elementary reactions. The results indicate that an increase in the CO dilution ratio corresponds to a linear decrease in both the adiabatic explosion pressure and the flame temperature. Furthermore, a higher CO dilution ratio leads to a decline in the heat release rate and the generation rates of H, O, and OH radicals, with the generation rate of H radicals experiencing the most notable reduction. Sensitivity analysis of elementary reactions reveals that reaction R1: H + O = O + OH has the most significant promoting effect, while R410: CH + H = H + iCH exhibits a pronounced inhibitory effect. CO effectively suppresses and transforms key intermediates through specific reaction pathways (such as R52: CH + CO = HCO + CO and R79: CH + CO = CHO + CO), thus reducing the overall heat release rate of the reactions. This study offers important theoretical insights into the inhibitory role of inert gases in H/CH gas mixtures, providing a foundation for safety management and the advancement of clean energy technologies.
随着氢能的发展，掺氢燃料在工业和能源领域得到了广泛应用，这使得人们对氢气/丙烷（H/CH）混合气体的爆炸特性和安全风险给予了极大关注。为有效降低这些爆炸风险，本研究考察了不同氮气（N）和二氧化碳（CO）稀释比对H/CH混合气体的惰化效果。采用CHEMKIN-Pro软件模拟这些混合气体的爆炸和惰化特性，分析绝热爆炸压力、火焰温度、关键自由基浓度、热释放速率以及基元反应敏感性等参数。结果表明，CO稀释比的增加对应着绝热爆炸压力和火焰温度的线性下降。此外，较高的CO稀释比会导致热释放速率以及H、O和OH自由基生成速率的下降，其中H自由基生成速率的下降最为显著。基元反应敏感性分析表明，反应R1：H + O = O + OH具有最显著的促进作用，而R410：CH + H = H + iCH表现出明显的抑制作用。CO通过特定反应途径（如R52：CH + CO = HCO + CO和R79：CH + CO = CHO + CO）有效抑制并转化关键中间体，从而降低反应的整体热释放速率。本研究为惰性气体对H/CH混合气体的抑制作用提供了重要的理论见解，为安全管理和清洁能源技术的发展奠定了基础。
