The research of methane adsorption in coal is of great significant for controlling methane emission and reducing the greenhouse gas. The Fourier Infrared Spectrum experiments, isothermal adsorption experiments and methane adsorption experiments were conducted to study the effect of tectonic coal structure on methane adsorption from the different of tectonic coal and raw coal, the solvent extraction role, the chemical component and the pore structure. The extraction yield order of different metamorphic degrees tectonic coals by pyridine was as follows: tectonic fat coal (31.14%) > tectonic gas coal (18.42%) > tectonic anthracite coal (0.24%), which indicated the content of small molecules. The methane ultimate adsorption amount had relation with the ratio of -CHx functional groups to oxygen functional groups. The order of micropore volume was tectonic anthracite coal (44.07 × 10⁻³ cm³ g⁻¹) > tectonic fat coal (13.67 × 10⁻³ cm³ g⁻¹) > tectonic gas coal (13.60 × 10⁻³ cm³ g⁻¹). Methane adsorption was mainly micropore adsorption, functional groups in coal affected available adsorptive positions, and the low molecular compounds in coal affected its adsorption capacity. The tectonic coal with high metamorphic degree, such as tectonic anthracite coal, has a very high adsorption capacity for methane and has a good prospect in controlling methane emission and reducing greenhouse gas.

煤中甲烷吸附的研究对于控制甲烷排放、减少温室气体排放具有重要意义。通过傅里叶红外光谱实验、等温吸附实验和甲烷吸附实验，从构造煤和原煤的不同、溶剂萃取作用、化学成分和孔隙结构等方面研究了构造煤结构对甲烷吸附的影响。吡啶对不同变质程度构造煤的提取得率顺序为：构造肥煤（31.14%）>构造气煤（18.42%）>构造无烟煤（0.24%），表明含有小分子物质。甲烷最终吸附量与-CHx官能团与氧官能团的比值有关。^-3 cm ³ g ^-1 ) > 构造肥煤（13.67 × 10 ^-3 cm ³ g ^-1）> 构造气煤（13.60 × 10 ^-3 cm ³ g ^-1）。甲烷吸附主要是微孔吸附，煤中的官能团影响有效吸附位置，煤中的低分子化合物影响其吸附能力。变质程度高的构造煤，如构造无烟煤，对甲烷具有很高的吸附能力，在控制甲烷排放和减少温室气体排放方面具有良好的前景。