煤层孔隙结构对CO吸附量的影响

Effection of Coal Pore Structure on CO Adsorption Quantity

针对开滦集团下属3个煤矿CO长期超标的现象,测定了CO在煤层中的吸附量和煤的孔隙结构,分析了不同孔径对煤层中CO吸附量的影响,讨论了煤的孔隙率、分形维数、比表面积与煤层中CO吸附量的关系.研究结果表明,低压条件下,煤层中CO气体的吸附量与微孔体积分数呈二次曲线关系,随着压力的升高CO的吸附量与微孔体积分数成正比关系;过渡孔体积分数的增加不利于煤层中CO的吸附;孔隙率、分形维数与CO的吸附量呈二次曲线关系;CO吸附量与煤样内比表面积呈正比.图5,表5,参11.

In view of the phenomenon that CO exceeds the stipulated standards for a long time in the three coal mines of Kailuan Group Ming Corporation, the CO adsorption quantity in coal beds and the coal pore structure were measured. The influence of different apertures on CO adsorption quantity in coal beds was analyzed. The relationships among coal porosity, fraetal dimension, specific surface area and the CO adsorption quantity in coal beds were discussed. The results show that the relationship between CO adsorption quantity and coal micropore keeps to a quadratic curve under low pressure, while the CO adsorption quantity increases along with the micropore increasing under higher pressure values. The CO adsorption ability in coal beds descends as the increasing of transition hole. The relationships among coal porosity, fractal dimension, and the CO adsorption quantity follow a quadratic curve. And the CO adsorption quantity increases along with internal specific surface area.