60~150℃温度热影响下无烟煤微观孔隙演进渐变规律研究  

Study on the gradual change law of microscopic pore evolution of anthracite under the influence of temperature heat at 60~150°C

作　　者：邱常青 李晓伟 Qiu Changqing;Li Xiaowei(Lu'an Chemical Group Yuwu Coal Industry Co.,Ltd.,Changzhi 046000,China;China University of Mining and Technology(Beijing)School of Emergency Management and Safety Engineering,Beijing 100083,China)

机构地区：[1]潞安化工集团余吾煤业有限责任公司,山西长治046000 [2]中国矿业大学(北京)应急管理与安全工程学院,北京100083

出　　处：《煤炭与化工》2025年第2期130-133,共4页Coal and Chemical Industry

摘　　要：为了研究热处理温度对煤中微观孔隙演进渐变规律的影响,以无烟煤样品为例,通过低温氮气吸附法表征了60~150℃热处理温度下煤的孔隙演变情况。结果表明,4种温度下热处理后样品的吸附等温线趋势与Ⅱ类吸附等温线相似,滞后环的形状与H3型滞后环相似,且样品中的孔隙多以狭缝孔为主。随着温度的增加,等温滞后环的面积逐渐减小,内部孔隙网络连通性得以改善,利于煤中甲烷的排采。温度对比表面积的增加起到了一定的促进作用,但对无烟煤样品孔容的影响较小。此外热处理对煤中位于0.5~10 nm的孔隙分布特征影响较大。研究结果可为注热增产煤层气工艺参数提供一定指导。In order to study the effect of heat treatment temperature on the gradual change law of microscopic pore evolution in coal,taking anthracite samples as an example,the pore evolution of coal at 60~150°C heat treatment temperature was characterized by low temperature nitrogen adsorption method.The results show that the adsorption isotherms of the samples after heat treatment at four temperatures are similar to the type II adsorption isotherms.The shape of the hysteresis loop is similar to that of the H3 hysteresis loop,and the pores in the samples are mainly slit pores.With the increase of temperature,the area of isothermal hysteresis loop decreases gradually,and the connectivity of internal pore network is improved,which is beneficial to the drainage of methane in coal.The increase of temperature specific surface area plays a certain role in promoting,but it has little effect on the pore volume of anthracite samples.In addition,heat treatment has a great influence on the pore distribution characteristics of 0.5~10 nm in coal.The research results can provide some guidance for the process parameters of heat injection to increase coalbed methane production.

关 键 词：温度 无烟煤 微观孔隙 注热 低温氮吸附 

分 类 号：TD84[矿业工程—煤矿开采]