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选取几组不同变质程度的煤样(无烟煤、贫煤、瘦煤、焦煤、肥煤、褐煤),在液氮温度下,通过测试煤样在气体饱和蒸气压力范围内对N2的吸附过程及吸附量,绘制低温氮吸附下的Langmuir吸附曲线综合图;同时,对煤样进行高压等温吸附甲烷试验。结果表明,这几组不同变质程度煤低温氮吸附的能力依次为:无烟煤>肥煤>瘦煤>褐煤>贫煤>焦煤,高压吸附甲烷的能力为:贫煤>无烟煤>褐煤>肥煤>瘦煤>焦煤。经过比较分析,在高压条件下,二者的吸附量是有差别的。
Several sets of coal samples with different metamorphic degrees (anthracite, lean coal, lean coal, coking coal, fat coal and lignite) were selected to test the adsorption process and adsorption of N2 in the range of gas saturated vapor pressure at liquid nitrogen temperature Volume, drawn Langmuir adsorption curve synthesis of low temperature nitrogen adsorption; the same time, the coal sample was subjected to high pressure isothermal adsorption of methane test. The results showed that the ability of these groups of coal with different metamorphic degrees of low temperature nitrogen adsorption followed as follows: anthracite> fat coal> lean coal> lignite> lean coal> coking coal, the ability of high pressure methane adsorption was: lean coal> anthracite> lignite> fat coal> Lean coal> coking coal. After comparative analysis, under high pressure conditions, the adsorption capacity of the two is different.