中文摘要：

以煤液化中油为原料，FV-20为催化剂，在微型反应釜中考察了不同温度和时间下煤液化中油进行加氢裂解反应前后的族组成变化．结果表明，在400℃以前，饱和烃含量随着温度的升高和时间的延长逐渐减小；在440℃时，40min出现最小值，饱和烃中直链烷烃随温度升高逐渐减小，环烷烃含量变化不大；芳烃含量逐渐增加，440℃时，30min出现最大值82．65%，其中单环芳烃逐渐增加，而双环和多环芳烃逐渐减少；极性物含量逐渐减小；产物中气态烃类在低于400℃时，随温度增加，CH4含量逐渐减少，C2H6和C3H6含量逐渐增大，在高于该温度时有C4H10出现，但气态烃产率变化不大．

英文摘要：

The middle distillate oil is the main product of coal liquefaction. In this paper, the group composition change of middle distillate oil from coal liquefaction before and after hydrocracking was investigated in an autoclave at different temperature and time using FV-20 as catalyst. The results show that the content of saturates gradually increase with the temperature and time increasing under 400 ℃. It reaches the minimum, under 440 ℃ for 40 min. The n-C12-27 of saturates decreasing with the increasing of temperature, cyclic-saturates change not too much. The content of aromatics increases and has a maximum 82.65% under 440 ℃ for 30 min. The content of mono-aromatics increase but di-aromatics and multi-aromatics decrease. The content of polar compounds decreased. When the temperature lower than 400 ℃, the gaseous hydrocarbon mainly concludes CH4, C2H6 and C3 H8. With the increasing reaction temperature, C4 H10 appears in the gaseous hydrocarbon, but its yield changes not too much.