特高煤级煤平衡水条件下的吸附实验

ADSORPTION EXPERIMENT OF EXTRA-HIGH RANK COAL UNDER THE CONDITION OF EQUILIBRIUM MOISTURE CONTENT

傅雪海 秦勇 李贵中 徐磊 胡超

FU Xuehai QIN Yong LI Guanzhong XU Lei HU Chao

中国矿业大学, 资源与地球科学学院, 江苏, 徐州, 221008

College of Mineral Resource and Environment Sciences, CUMT, Xuzhou, Jiangsu 221008, China

鉴于国内外对镜质组最大反射率Ro(max)大于4.0%的特高煤级煤的吸附特性研究的空白,作者系统地采集了12个Ro(max)>4.0%的煤样进行了平衡水条件下的高压等温吸附实验,分析了特高煤级煤样的朗格缪尔常数与Ro(max)、显微煤岩组分、比孔容和比表面积的关系,发现了煤的朗格缪尔体积随煤级变化的拐点是在Ro(max)为4.5%左右。在上述研究的基础上,文中探讨了煤的吸附特征及机理。

In view of the gaps existing in the adsorptive characteristics research of extra high rank coal whose vitrinite has the maximum reflectance(Ro(max))of more than 4.0%,twelve coal samples(Ro(max)>4.0%)were collected systematically and conducted a high pressure and isothermal adsorption experiment under the condition of equilibrium moisture content,and the relationships between the Longmuir constant of extra high rank coal samples and Ro(max),maceral,specific pore volume or specific surface area were analyzed.It was found that inflection point on the curve of Longmuir volume vs.coal rank is around Ro(max)=4.5%.On the basis of above research,the adsorptive characteristics and mechanism of coal were discussed.

国家自然科学基金(49772131).

https://doi.org/10.11781/sysydz200202177