煤体结构对吸附/解吸的影响研究

On the impact of coal structure on adsorption/desorption

通过对比河南省二1煤的非突出煤(原生结构煤和碎裂煤)和突出煤(碎粒煤和糜棱煤)在含气量、气体成分、甲烷稳定碳同位素、等温吸附和镜质组最大反射率等方面的差异性,探讨煤体结构对煤的吸附/解吸特性的影响。研究结果表明,突出煤的含气量、损失气量、兰氏体积、兰氏压力和δ13C同位素都明显高于非突出煤,N2组分含量和解吸时间低于非突出煤。指出造成这些现象的本质是突出煤发生动力变质作用后分子结构、孔隙特性等发生了显著变化所致。

By comparing the non-outburst coal （normal coal and cataclastic coal）with outburst coal （granulated coal and mylonitic coal） of ]1 1 coal of Henan in the differences of gas con- tent, gas composition, stable carbon isotope of methane, adsorption isotherm and maximum vitrinite reflectance , the paper has explored the impact of coal structure on adsorption/desorption. The result shows that the gas content, gas loss, Langmuir volume, Langmuir pressure, and δ13C isotopes of outburst coal are obviously higher than non-outburst coal, and N2 component content and desorption time are less than non-outburst coal. The nature of these phenomena results from the obvious changes of molecular structure and pore characteristics of outburst coal after dynamic metamorphism.