煤矿安全2024，Vol.55Issue(2)：87-98,12.DOI:10.13347/j.cnki.mkaq.20230173
不同变质程度烟煤的自燃特性研究
Study on spontaneous combustion characteristics of bituminous coal with different degrees of metamorphism
摘要
Abstract
In order to study the changes of spontaneous combustion characteristics of bituminous coal with different degrees of meta-morphism,according to the order of metamorphism degrees from low to high,four types of bituminous coal with different degrees of metamorphism were selected:Ningxia Lingwu non-stick coal,Ningxia Lingwu gas coal,Shanxi Huozhou 1/3 coking coal and Liaon-ing Shenyang lean coal,and liquid nitrogen adsorption experiments,Fourier infrared spectroscopy experiments and TG-DSC simul-taneous thermal analysis experiments were conducted respectively.The results showed that the specific surface area of internal pores of bituminous coal gradually increased with the increase of the degree of metamorphism,and the pore volume changed in the same trend;the proportion of active functional groups in coal samples gradually decreased,and the proportion of chemically stable func-tional groups gradually increased;the critical temperature T1 and ignition point temperature T4 of bituminous coal gradually in-creased with the increase of the degree of metamorphism,and the heat release in the combustion stage of coal samples gradually de-creased.In summary,the chemical properties of bituminous coal become more stable with the increase of deterioration,and it is more difficult to spontaneously combust;the influence of active functional groups in coal samples is greater than that of pore structure.关键词
煤自燃/TG-DSC/自燃特性/BET比表面积/放热特性/含氧官能团Key words
spontaneous combustion of coal/TG-DSC/spontaneous combustion characteristics/BET specific surface area/exo-thermic characteristics/oxygenated functional groups分类
矿业与冶金引用本文复制引用
贾廷贵,张智超,郝长胜..不同变质程度烟煤的自燃特性研究[J].煤矿安全,2024,55(2):87-98,12.基金项目
内蒙古自治区自然基金面上资助项目(2022LHMS05019,2022LHMS05020) （2022LHMS05019,2022LHMS05020）
内蒙古自治区高等学校自然科学重点资助项目(NJZZ21025) （NJZZ21025）
