摘要
为探究风化煤自燃特性及阻化剂对其抑制效果,利用程序升温和红外光谱分析不同煤样的指标气体、交叉点温度和活性官能团的变化规律。结果表明:风化煤比原煤样指标气体生成量更大,交叉点温度更低,自燃危险性更大。复合阻化剂对原煤和风化煤均有抑制作用,但阻化煤产气浓度比原煤和风化煤低,交叉点温度却要高。但是复合阻化剂对原煤的阻化率比风化煤高1.91%。风化煤甲基、亚甲基和羰基含量高于原煤,但低于阻化煤样,风化过程使得活性基团数量增加,煤氧反应更容易。阻化过程中阻化剂中的部分卤根离子、镁离子和钙离子能与煤中含氧官能团(如—C=O)发生取代或络合等化学反应并生成稳定的化合物,增加了煤分子的稳定性,达到良好的阻化目的。
In order to investigate the spontaneous combustion characteristics of weathered coal and the inhibition effect of the inhibitor on it,the changing rules of indicator gas,cross-point temperature and active functional group of different coal samples were analyzed by using programmed warming and infrared spectroscopy.The results show that weathered coal has a larger amount of indicator gas generation and lower cross-point temperature than the original coal samples,which makes the spontaneous combustion more dangerous.The composite inhibitor has inhibitory effect on both the original coal and weathered coal,but the gas generation concentration of the inhibited coal is lower than that of the original coal and weathered coal,while the cross-point temperature is higher.However,the inhibition rate of composite inhibitor on raw coal was 1.91%higher than that of weathered coal.The content of methyl,methylene and carbonyl groups of weathered coal was higher than that of raw coal,but lower than that of the resisted coal samples,and the weathering process made the number of reactive groups increase and the coal-oxygen reaction easier.Some halogen ions,magnesium ions and calcium ions in the resisting agent in the resisting process can substitute or complex with the oxygen-containing functional groups(e.g.—C=O)in the coal and generate stable compounds,which increase the stability of the coal molecules and achieve good resisting purpose.
作者
王银辉
WANG Yinhui(China Coal Research Institute,Beijing 100013,China;China Coal Technology&Engineering Group Shenyang Research Institute,Fushun 113122,China;State Key Laboratory of Coal Mine Disaster Prevention and Control,Fushun 113122,China)
出处
《应用化工》
北大核心
2025年第2期293-297,共5页
Applied Chemical Industry
基金
国家重点研发计划(2022YFC3004701)
辽宁省自然科学基金(2022-KF-13-03)。
关键词
风化煤
阻化剂
抑制效果
交叉点温度
活性官能团
weathered coal
retarding agent
inhibition effect
cross point temperature
active functional group coal
