CAJ | 학술논문

基于原煤和有机溶剂抽余物的等温吸附实验结果,对比分析溶剂极性与其煤抽余物吸附甲烷能力变化关系,探讨抽提溶剂极性差异对煤抽余物吸附甲烷能力控制的地球化学机理。结果表明,煤溶剂抽余物等温吸附甲烷曲线都遵循Langmuir方程,且二硫化碳( CS2)和苯( C6 H6)溶剂抽提作用增大了煤吸附甲烷量,四氢呋喃( THF)和丙酮溶剂抽提作用减小了煤吸附甲烷量。实验发现,煤抽余物吸附甲烷能力变化与抽提溶剂极性成负相关关系,该现象可用相似相容原理解释：CS2和C6 H6溶剂极性较弱,抽提出较多具有非极性结构(-CH3和-CH2-)的烷烃和芳烃,为甲烷在煤表面吸附增多了吸附位而增强了抽余物吸附甲烷能力,THF和丙酮溶剂极性较强,抽提出较多具有极性结构(-CHO、-OH、和-COOH)的非烃和沥青质,减少了吸附位而降低煤抽余物的甲烷吸附能力。
기우원매화유궤용제추여물적등온흡부실험결과,대비분석용제겁성여기매추여물흡부갑완능력변화관계,탐토추제용제겁성차이대매추여물흡부갑완능력공제적지구화학궤리。결과표명,매용제추여물등온흡부갑완곡선도준순Langmuir방정,차이류화탄( CS2)화분( C6 H6)용제추제작용증대료매흡부갑완량,사경부남( THF)화병동용제추제작용감소료매흡부갑완량。실험발현,매추여물흡부갑완능력변화여추제용제겁성성부상관관계,해현상가용상사상용원리해석：CS2화C6 H6용제겁성교약,추제출교다구유비겁성결구(-CH3화-CH2-)적완경화방경,위갑완재매표면흡부증다료흡부위이증강료추여물흡부갑완능력,THF화병동용제겁성교강,추제출교다구유겁성결구(-CHO、-OH、화-COOH)적비경화력청질,감소료흡부위이강저매추여물적갑완흡부능력。
Based upon isothermal methane adsorption on raw and solvent extracted coals, relationship between solvent polarity and methane adsorption capacity change of the coal was analyzed, and the possible geochemical mechanism was discussed from polarity of the solvents. The results show that methane isothermal adsorption curves on the extracted coals follow the Langmuir equation. Extraction with CS2 and C6 H6 enhances methane adsorption capacities on extracted coals, and that with tetrahydrofuran ( THF) and acetone is opposite. There is a negative correlation between methane adsorption capacity change of the coal and the solvent polarity, which can be explained by similarity-intermiscibility theory. The polarities of CS2 and C6 H6 are weaker, which can extract more alkane and aromatic hydrocarbons with nonpolar molecule structure (-CH3 and -CH2-) to increase the adsorbed space of coal surface for methane adsorption. The polarities of THF and acetone are stronger, which can extract more non-hydrocarbon and asphaltene with polar molecule structure (-CHO, -OH and -COOH) to reduce the adsorbed space of coal surface for methane adsorption.