惰性气体对C2H6可燃极限的影响及其产生原因

doi:10.12068/j.issn.1005-3026.2025.20240054

东北大学学报（自然科学版） ›› 2025, Vol. 46 ›› Issue (10): 74-80.DOI: 10.12068/j.issn.1005-3026.2025.20240054

惰性气体对C₂H₆可燃极限的影响及其产生原因

袁畅, 胡贤忠, 张娟

东北大学冶金学院，辽宁沈阳 110819

收稿日期:2024-03-08 出版日期:2025-10-15 发布日期:2026-01-13
作者简介:袁畅（1999—），女，辽宁抚顺人，东北大学硕士研究生
胡贤忠（1984—），男，山东枣庄人，东北大学副教授，硕士生导师.
基金资助:
辽宁省自然科学基金资助项目(2023-1SBA-100);中央高校基本科研业务费专项资金资助项目(N2425018)

Influence of Inert Gases on Flammability Limit of C₂H₆ and Their Formation Causes

Chang YUAN, Xian-zhong HU, Juan ZHANG

School of Metallurgy，Northeastern University，Shenyang 110819，China. Corresponding author： HU Xian-zhong，E-mail： huxz@smm. neu. edu. cn

Received:2024-03-08 Online:2025-10-15 Published:2026-01-13

摘要/Abstract

摘要：

在5 L定容燃烧弹中实验测定了O₂/惰性气体（N₂，Ar和CO₂）氛围中乙烷的可燃极限.在3种惰性气体中，CO₂对可燃极限影响最大.对于可燃下极限，Ar和N₂使其轻微降低，而CO₂使其从3.40%增至4.65%.可燃上极限变化更显著，当惰性气体体积分数从10%增至80%时，CO₂使其从51.5%降至8.0%，降低了43.5%，而Ar和N₂分别使其降低39.0%和40.0%.为探究影响原因，使用极限层流燃烧速度法分离了惰性气体的稀释、化学、热力学和辐射作用的影响.结果表明，N₂仅有稀释和辐射作用的影响，而Ar和CO₂存在4种作用的影响.在可燃下极限处，N₂的稀释作用影响最强，占总影响的99.2%，Ar和CO₂的热力学作用影响最大，分别占总影响的64.4%和51.4%；对于可燃上极限，稀释作用的影响始终最大.

关键词: 气体燃料, 可燃极限, 惰性气体, 极限层流火焰速度法, 反应动力学分析

Abstract:

The flammability limit of ethane in O₂/inert gases （N₂， Ar， CO₂） atmosphere was experimentally determined in a 5 L constant volume combustion bomb. Among the three inert gases， CO₂ is of the greatest influence on the flammability limit. For the lower flammability limit， Ar and N₂ decreased it slightly， while CO₂ increased it from 3.40% to 4.65%. The upper flammability limit changed more significantly； as the inert gas concentration increased from 10% to 80%， CO₂ reduced it from 51.5% to 8.0%， a reduction of 43.5%， while Ar and N₂ reduced it by 39.0% and 40.0%. The dilution， chemical， thermodynamic， and radiation effects of inert gases were separated with the limiting laminar burning velocity method. The results show that N₂ only produces the effects of dilution and radiation， while Ar and CO₂ produce four effects. At the lower flammability limit， the dilution effect of N₂ is the strongest， accounting for 99.2% of the total effect， and the thermodynamic effect of Ar and CO₂ is the largest， accounting for 64.4% and 51.4% of the total effect， respectively. For the upper flammability limit， the dilution effect is always of the greatest influence.

Key words: gaseous fuel, flammability limit, inert gas, limiting laminar burning velocity method, reaction kinetics analysis

中图分类号:

TK 16

袁畅, 胡贤忠, 张娟. 惰性气体对C₂H₆可燃极限的影响及其产生原因[J]. 东北大学学报（自然科学版）, 2025, 46(10): 74-80.

Chang YUAN, Xian-zhong HU, Juan ZHANG. Influence of Inert Gases on Flammability Limit of C₂H₆ and Their Formation Causes[J]. Journal of Northeastern University(Natural Science), 2025, 46(10): 74-80.

图/表 12

图1 实验装置示意图

Fig.1 Schematic diagram of experimental setup

图2 极限层流燃烧速度法原理图

Fig.2 Principle diagram of limiting laminar burning velocity method

图3 可燃极限实验结果

Fig.3 Experimental results of flammability limit

图4 可燃极限实验和计算结果

Fig.4 Experimental and simulated results of flammability limit

图5 稀释作用对可燃极限的影响

Fig.5 Influence of dilution effect on flammability limit

图6 稀释作用与氧气减少量的关系（a）—可燃下极限；（b）—可燃上极限.

Fig.6 Relationship between dilution effect and O2 reduction

图7 化学作用对可燃极限的影响

Fig.7 Influence of chemical effect on flammability limit

图8 可燃极限附近，层流火焰速度的敏感性系数（a）—可燃下极限；（b）—可燃上极限.

Fig.8 Sensitivity coefficient of laminar burning velocity at flammability limit

图9 热力学作用对可燃极限的影响

Fig.9 Thermodynamic effect on flammability limit

图10 添加惰性气时混合物的比热容

Fig.10 Specific heat capacity of mixture when inert gases are added

图11 辐射作用对可燃极限的影响

Fig.11 Influence of radiation effect on flammability limit

图12 稀释作用、化学作用、热力学作用、辐射作用对可燃极限的影响

Fig.12 Influence of dilution, chemical, thermodynamic,

参考文献 10

[1]	Wang T， Zhou Y， Luo Z M， et al. Flammability limit behavior of methane with the addition of gaseous fuel at various relative humidities［J］. Process Safety and Environmental Protection， 2020， 140： 178-189.
[2]	Leo Y， Zhang B， Dai T K， et al. Influence of pressure and dilution gas on the explosion behavior of methane-oxygen mixtures［J］. Fuel， 2023， 333： 126390.
[3]	Xie Y， Zhang Y Q， Zhuang C J， et al. Experimental study on flammability limits behavior of methane， ethane， and propane with dilution of nitrogen［J］. ACS Omega， 2023， 8（31）： 28758-28768.
[4]	Zhang B， Xiu G L， Bai C H. Explosion characteristics of argon/nitrogen diluted natural gas-air mixtures［J］. Fuel， 2014， 124： 125-132.
[5]	Abdelkhalik A， Askar E， Markus D， et al. Explosion regions of 1，3-dioxolane/nitrous oxide and 1，3-dioxolane/air with different inert gases - experimental data and numerical modelling［J］. Journal of Loss Prevention in the Process Industries， 2021， 71： 104496.
[6]	Le Chatelier H， Boudouard O. On the flammable limits of gas mixtures［J］. Process Safety Progress， 2005， 24（1）： 3-5.
[7]	Kondo S， Takizawa K， Takahashi A， et al. Extended Le Chatelier’s formula for carbon dioxide dilution effect on flammability limits［J］. Journal of Hazardous Materials， 2006， 138（1）： 1-8.
[8]	Ma T G. A thermal theory for estimating the flammability limits of a mixture［J］. Fire Safety Journal， 2011， 46（8）： 558-567.
[9]	Pio G， Salzano E. Evaluation of safety parameters of light alkenes by means of detailed kinetic models［J］. Process Safety and Environmental Protection， 2018， 119： 131-137.
[10]	Davis S G， Law C K， Wang H. Propene pyrolysis and oxidation kinetics in a flow reactor and laminar flames［J］. Combustion & Flame， 1999， 119（4）： 375-399.

惰性气体对C₂H₆可燃极限的影响及其产生原因

Influence of Inert Gases on Flammability Limit of C₂H₆ and Their Formation Causes

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