摘要
为了探究不同变质程度煤样中活性基团与传热性质的变化与联系,利用红外光谱技术和激光导热技术研究了4种不同变质程度煤样的活性基团和热物性参数变化。结果表明:随着煤变质程度的增高,煤中的芳香族化合物和脂肪族化合物的百分含量逐渐升高,含氧官能团的百分含量逐渐降低;煤中的含氧官能团以醇、酚和醚为主;随着温度的升高,煤的热扩散系数先降后升,而比热容和导热系数整体呈不断升高的趋势;煤的热物性与煤的变质程度和工业分析数据有关。皮尔逊相关系数计算结果表明,—C=C—、—CH_(3)、—CH_(2)—、脂肪—CH与热扩散系数和导热系数的负相关性较强,而—C=O与热扩散系数和导热系数的正相关性较强,—OH则与比热容存在良好的负相关关系。
In order to investigate the changes and relationship of reactive groups and heat transfer properties in coal samples with different degrees of metamorphism,the changes of active groups and thermal properties of 4 kinds of coal samples with different degrees of metamorphism were investigated by infrared spectroscopy and laser thermal conductivity.The results show that with the increase of coal metamorphism,the percentage of aromatic compounds and aliphatic compounds in coal increases gradually,and the percentage of oxygen-containing functional groups decreases gradually.The oxygen-containing functional groups in coal are mainly alcohols,phenols and ethers.With the increase of temperature,the thermal diffusion coefficient of coal decreases first and then increases,while the specific heat capacity and thermal conductivity increase continuously.The thermal properties of coal are related to the degree of coal metamorphism and industrial analysis data.The results of Pearson correlation coefficients show that—C=C—,—CH_(3),—CH_(2)—and aliphatic—CH have a large negative correlation with thermal diffusion coefficient and thermal conductivity,while—C=O has a large positive correlation with the thermal diffusivity and thermal conductivity while—OH has a good negative correlation with specific heat capacity.
作者
邢婧
XING Jing(School of Energy and Water Resources,Shenyang Institute of Technology,Fushun 113122,China)
出处
《矿业安全与环保》
CAS
北大核心
2023年第5期82-87,共6页
Mining Safety & Environmental Protection
关键词
煤自燃
活性基团
导热系数
热扩散系数
比热容
皮尔逊相关系数
coal spontaneous combustion
reactive group
thermal conductivity
thermal diffusivity
specific heat capacity
Pearson correlation coefficient
