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[1]徐永亮,宋志鹏,王少坤,等.贫氧环境对煤低温氧化特性影响研究[J].中国安全生产科学技术,2016,12(11):82-87.[doi:10.11731/j.issn.1673-193x.2016.11.014]
 XU Yongliang,SONG Zhipeng,WANG Shaokun,et al.Research on oxidation characteristics of coal at low temperature affected by oxygen-lean environment[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2016,12(11):82-87.[doi:10.11731/j.issn.1673-193x.2016.11.014]
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贫氧环境对煤低温氧化特性影响研究
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
12
期数:
2016年11期
页码:
82-87
栏目:
现代职业安全卫生管理与技术
出版日期:
2016-11-30

文章信息/Info

Title:
Research on oxidation characteristics of coal at low temperature affected by oxygen-lean environment
文章编号:
1673-193X(2016)-11-0082-06
作者:
徐永亮12 宋志鹏1王少坤1荆国松1余明高12
(1. 河南理工大学 安全科学与工程学院,河南 焦作454003;2. 煤炭安全生产河南省协同创新中心,河南 焦作 454003)
Author(s):
XU Yongliang12SONG Zhipeng1WANG Shaokun1JING Guosong1 YU Minggao12
(1. College of Safety Science & Engineering, Henan Polytechnic University, Jiaozuo Henan 454003, China; 2. Collaborative Innovation Center of Coal Safety Production of Henan Province, Jiaozuo Henan, 454003, China)
关键词:
贫氧环境程序升温指标气体温度特征脂肪侧链
Keywords:
oxygen-lean environment programmed temperature rising index gas temperature characteristic aliphatic side chains
分类号:
TD75
DOI:
10.11731/j.issn.1673-193x.2016.11.014
文献标志码:
A
摘要:
浅埋藏煤层开采过程中,由于地表裂隙导致的漏风,使其经常处于变化的氧浓度场中。针对这一实际情况,利用煤氧化动力学测定系统,对煤样在21%,18%,14%,10.5%,5%,3%氧浓度下,进行程序升温试验。测得了不同温度下指标气CO,C2H4,C2H6,C3H8浓度,并分析了其随温度变化规律,测量并计算了不同氧浓度下交叉点温度以及升温速率;对氧浓度大小影响指标气产量和其随温度变化幅度原因,以及温度特征影响效果进行必要的机理分析。结果表明:不同氧浓度下指标气CO,C2H4,C2H6在70 ℃左右有明显产量变化,分别在120 ℃,125 ℃,120 ℃处开始大量释放,C3H8则在温度达到125 ℃左右开始大量释放;120 ℃前,各氧浓度下煤样温度按相同规律变化,120 ℃后,氧浓度越大则对应的升温速率越大,温度也越高;氧浓度不同影响了煤中脂肪烃侧链氧化产生-OH的过程,继而造成指标气产量与温度变化差异。
Abstract:
The coal seam under shallow cover could always be in the changing oxygen concentration field due to the air leakage through the fracture on the ground. In view of the actual situation, the programmed temperature rising experiments were carried out for the coal samples under the conditions of 21%, 18%, 14%, 10.5%, 5% and 3% oxygen concentration by using the coal oxidation kinetics determination system. The concentrations of the index gases CO, C2H4, C2H6 and C3H8 were measured at different temperatures, and the variation laws of the concentration with temperature were analyzed, then the crossing-point temperature and temperature rising rate at different oxygen concentrations were measured and calculated. The necessary mechanism analysis was conducted on the effect of oxygen concentration on the index gases yield and the reasons of its change with temperature, and the effect on the temperature characteristics. The results showed that under different oxygen concentrations, the obvious yield change of the index gases CO, C2H4 and C2H6 appear at about 70 ℃, and they begin to release with large quantities at 120 ℃, 125 ℃ and 120 ℃ respectively, while C3H8 begins to release with large quantity at about 125 ℃. Before 120 ℃, the temperatures of coal samples under different oxygen concentrations change with the same tendency, while after 120 ℃, the more the oxygen concentration, the larger the corresponding temperature rising rate, and the higher the temperature. The different oxygen concentrations influence the process of producing -OH by oxidation of aliphatic side chains in coal, which causes the difference of index gases yield and temperature change.

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备注/Memo

备注/Memo:
国家自然科学基金项目(U1361205,51304071,51304073)
更新日期/Last Update: 2017-01-04