中文摘要：

对四种不同变质程度的烟煤进行了热处理和水热处理，采用二硫化碳-N-甲基吡咯烷酮（CS2-NMP，1：1 volume ratio）混合溶剂在室温下对原煤及处理后的煤进行了抽提。结果发现，适当条件的热处理和水热处理均可以提高其在混合溶剂中抽提率，水热处理较热处理更能有效增加煤的抽提率。红外光谱分析表明，水热处理的煤样在波数为3410cm^-1左右的吸收峰变小，由于水热解处理后氧的脱除而使-OH减少，使得由羟基形成的H键被削弱，因而抽提率增加。水热处理具有脱除矿物质的作用，对高变质程度的煤还可以脱除原煤中的π-阳离子缔合，从而可以明显提高其抽提率。此外，对煤的水热解机理进行了探讨。

英文摘要：

4 bituminous coals with different ranks were thermally and hydrothermally treated under different conditions, and the raw and treated coals were extracted with carbon disulfide/N-2-pyrrolidinone （CS2/NMP） mixed solvent （ 1 ： 1 by volume）. It is found that the extraction yields of the thermal or hydrothermal treated coals at proper conditions increase in different extent. The increments of extraction yields for hydrothermal treated coals are higher than those of thermal treated coals. FT-IR shows that the adsorption peaks at 3 410 cm^-1 attributed to OH group for the hydrothermal treated coals decrease, suggesting the dissociation of the coal aggregation structure due to the breakage of hydrogen bonds, resulting in the increase of extraction yields for the treated coals. For higher rank coal, the removal of minerals and the dissociation of w-cation association after hydrothermal treatment of coal may be responsible for the increase of extraction yield. In addition, the mechanism of hydrothermal treatment of coal was discussed.