溶剂抽提法研究煤中小分子相结构

7 typical Chinese coal samples were extracted by NMP/CS2 system at around 90 ℃ by Soxhlet method. Compared with results from NMP, a higher coal extraction rate was acquired when NMP+CS2 solvent system was adopted. Except for anthracite, above 20% extraction rate of other coals was acquired, particularly 41% for long flame coal. By using the method of retention index of coal extracts analysis by HPLC, it is found that the polar part with less than six-carbon numbers in coal is the active site for coal reactivity, and the inert site belongs to the aromatic hydrocarbon derivation with 3 aromatic rings.