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在400 ℃、30 min、7 MPa冷氢压条件下两种煤液化结果表明，兖州煤比DECS-6(美国煤)煤更容易液化或共液化，这可能与兖州煤硫含量比较高有关，但DECS-6煤的油收率要高于兖州煤，表明EDCS-6煤容易裂解生成小分子化合物。同种煤液化油的沸点分布特征基本一致。UV(紫外光谱)特征表明，液化油中单环芳烃主要为烷基取代苯类化合物，二环芳烃组分主要是烷基取代萘类化合物，三环芳烃主要为渺位缩合的菲类化合物，四环芳烃主要为芘、屈艹类化合物，五环芳烃以苯并芘类化合物为主，而极性化合物可归属为含O、S、N的极性芳香化合物。“,”Two high-volatile subbituminous coals, DECS-6 of US and Yanzhou coal of China, were liquefied or co-liquefied with HDPE or PVC at 400?℃, 30?min under 7?MPa hydrogen. The results show that Yanzhou coal is easier to be liquefied or co-liquefied than DECS-6 coal under the experimental conditions used and the hexane-soluble oil from Yanzhou coal has more low boiling point fractions than that from DECS-6 coal. The aromatics in hexane soluble oils mainly consist of alkylbeneze, alkylnaphthalene, phenanthrene-,pyrene-, chrysene-, and benzopyrene- compounds, the polars mainly compose of compounds containing O， S and N etc.