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对加水热解条件下煤的生排烃特征进行了分析，煤的正构单体烷烃排烃效率与实际地质情况下排烃效率有差异，因此，煤加水热解条件下的排烃效率不能直接用于实际的地质情况，而应当与具体的情况结合起来加以修正才可应用。煤的液态产物正构单体烷烃中基本以低碳数部分为主，高峰产率碳数集中于Ｃ１４以下，而这部分烃在一般的氯仿沥青“Ａ”抽提过程中基本都损失了。并且分子越小，损失越多，因而在利用一般的氯仿沥青“Ａ”数据计算生烃量、排烃量和资源量时，应对轻质烃部分进行适当的校正。各正构单体烷烃的排烃特征不一致，产率较高的Ｃ９－Ｃ１２排烃效率较低，Ｃ１３－Ｃ３０部分正构单体烷烃的排烃效率却较高，Ｃ８以下的低碳数部分排烃效率也高。
The characteristics of hydrocarbon generation and expulsion in coal under pyrolysis conditions were analyzed. The hydrocarbon expulsion efficiency of normal alkane in coal was different from that in actual geological conditions, therefore, the efficiency of hydrocarbon expulsion under the condition of coal pyrolysis could not Directly used in the actual geological conditions, but should be combined with the specific circumstances to be amended before they can be applied. The liquid products of coal are mainly composed of low-carbon parts in normal alkanes, and the peak yields of carbon are concentrated below C14, and these hydrocarbons are basically lost during the extraction of “A” of common chloroform bitumen. And the smaller the molecules, the more losses. Therefore, when using the general chloroform bitumen “A” data to calculate the amount of hydrocarbon generation, hydrocarbon expulsion and resource, the light hydrocarbons should be properly corrected. The hydrocarbon expulsion characteristics of the normal alkanes are not consistent, the higher the yield of C9-C12 hydrocarbon expulsion efficiency is lower, C13-C30 part of the normal monomer paraffin hydrocarbon expulsion efficiency is higher, C8 below the lower part of the number of carbon Hydrocarbon expulsion efficiency is also high.