CO2/N2配比及O2体积分数对煤低温氧化特性的影响

doi:10.16265/j.cnki.issn1003-3033.2025.03.1568

中国安全科学学报 ›› 2025, Vol. 35 ›› Issue (3): 125-132.doi: 10.16265/j.cnki.issn1003-3033.2025.03.1568

CO₂/N₂配比及O₂体积分数对煤低温氧化特性的影响

吴春雷¹^,²(), 史波波³, 薛勇²^,^**(), 郭庆旭⁴

¹ 南京信息工程大学环境科学与工程学院,江苏南京 210044
² 南京信息工程大学应急管理学院,江苏南京 210044
³ 中国矿业大学安全工程学院,江苏徐州 221116
⁴ 南京晨光集团有限责任公司,江苏南京 210006

收稿日期:2024-10-11 修回日期:2024-12-14 出版日期:2025-03-28
通信作者:
** 薛勇(1965—),男,江苏徐州人,博士,教授,主要从事定量遥感、地球大数据及通导遥协同一体化应急管理领域等方面研究。E-mail:yxue@nuist.edu.cn。
作者简介:
吴春雷 (1995—),男,安徽宿州人,博士,主要从事地下空间火灾防治、惰气(CO₂+N₂)防灭火、防灾减灾工程等方面的研究。E-mail:wuchunlei831@126.com。
史波波，教授；
基金资助:
国家自然科学基金资助(42275147); 国家自然科学基金资助(52474262); 国家自然科学基金资助(52074277)

Influence of CO₂/N₂ ratio and O₂ volume fraction on low-temperature oxidation characteristics of coal

WU Chunlei¹^,²(), SHI Bobo³, XUE Yong²^,^**(), GUO Qingxu⁴

¹ School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing Jiangsu 210044, China
² School of Emergency Management, Nanjing University of Information Science and Technology, Nanjing Jiangsu 210044, China
³ School of Safety Engineering, China University of Mining and Technology, Xuzhou Jiangsu 221116, China
⁴ Nanjing Chenguang Group Co., Ltd., Nanjing Jiangsu 210006, China

Received:2024-10-11 Revised:2024-12-14 Published:2025-03-28

摘要/Abstract

摘要：

为优化采空区混合惰气防灭火技术,研究CO₂/N₂配比和O₂体积分数对煤低温氧化特性的影响;以甘肃东峡矿长焰煤为研究对象,采用程序升温试验系统,结合气相色谱分析,开展不同CO₂/N₂配比(0∶10~10∶0)和O₂体积分数(6%、10%、14%、18%)条件下的低温氧化试验。结果表明:在相同O₂体积分数下,随着CO₂/N₂配比增加,长焰煤的耗氧速率和CO产生率的下降速率逐渐减缓,下降幅度随温度升高而增大;长焰煤的表观活化能在缓慢氧化阶段随CO₂/N₂配比增加逐渐增大,在加速和快速氧化阶段先增后减,CO₂/N₂配比为4∶6时最大。

关键词: CO₂/N₂配比, O₂体积分数, 低温氧化, 耗氧速率, CO产生率, 表观活化能

Abstract:

To optimize the mixed inert gas fire suppression technique for goafs, the effects of CO₂/N₂ ratio and O₂ volume fraction on the low-temperature oxidation characteristics of coal were investigated. Taking the long flame coal from Dongxia mine in Gansu as the research subject, a temperature-programmed experimental system combined with gas chromatography analysis was employed to carry out low-temperature oxidation experiments under various CO₂/N₂ ratios (ranging from 0∶10 to 10∶0) and O₂ volume fractions (6%, 10%, 14%, and 18%). The results indicate that at the same O₂ volume fraction, as the CO₂/N₂ ratio increases, the rates of oxygen consumption and CO production of the long-flame coal gradually slow down, with the decline rates increasing as the temperature rises. The apparent activation energy of the long-flame coal increases gradually with the increase in the CO₂/N₂ ratio during the slow oxidation stage, while it initially increases and then decreases during the accelerated and rapid oxidation stages, reaching the maximum value at a CO₂/N₂ ratio of 4∶6.

Key words: CO₂/N₂ ratio, O₂ volume fraction, low temperature oxidation, oxygen consumption rate, CO production rate, apparent activation energy

中图分类号:

X937
TD752.2

吴春雷, 史波波, 薛勇, 郭庆旭. CO₂/N₂配比及O₂体积分数对煤低温氧化特性的影响[J]. 中国安全科学学报, 2025, 35(3): 125-132.

WU Chunlei, SHI Bobo, XUE Yong, GUO Qingxu. Influence of CO₂/N₂ ratio and O₂ volume fraction on low-temperature oxidation characteristics of coal[J]. China Safety Science Journal, 2025, 35(3): 125-132.

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煤种	工业分析
煤种	水分/%	灰分/%	挥发分/%	固定碳/%
长焰煤	6.68	10.97	45.96	36.39

CO₂/N₂配比及O₂体积分数对煤低温氧化特性的影响

Influence of CO₂/N₂ ratio and O₂ volume fraction on low-temperature oxidation characteristics of coal

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序号	煤样	气体/%			CO₂/N₂	序号	煤样	气体/%			CO₂/N₂
序号	煤样	O₂	CO₂	N₂	CO₂/N₂	序号	煤样	O₂	CO₂	N₂	CO₂/N₂
1	长焰	20.9	0	79.1	0∶10	10	长焰	10	0	90	0∶10
2		18	0	82	0∶10	11		10	18	72	2∶8
3		18	16.4	65.6	2∶8	12		10	36	54	4∶6
4		18	32.8	49.2	4∶6	13		10	54	36	6∶4
5		18	49.2	32.8	6∶4	14		10	72	18	8∶2
6		18	65.6	16.4	8∶2	15		10	90	0	10∶0
7		18	82	0	10∶0	16		6	0	94	0∶10
8		14	0	86	0∶10	17		6	94	0	10∶0
9		14	86	0	10∶0

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