中文摘要：

分段热解可以研究不同阶段煤结构中化学键断裂的信息，也可以提高热解焦油产率。为了进一步了解分段热解产物的分布规律，本实验选用石河子烟煤，利用固定床反应器，分别研究了在N2、H2以及催化加氢情况下，分段热解与-段热解对焦油产率、半焦产率及焦油族组分的影响，其中Ni／AhO3Pt／A12O3两种催化剂采用浸渍法制备。通过分析不同温度分段焦油的组成，考察了N2，H2以及催化加氢对不同温度分段热解的影响，实验结果表明：随着温度的升高，焦油产率下降；N2气氛下，在StageⅠ、StageⅡ和StageⅢ焦油产率分别为4．3％、0．53％和0．39％；在加氢和M、Pt催化加氢时，焦油的产率大约分别是相应阶段N2气氛下的1．2、3和2倍，分段热解相比于直接热解可以明显提高焦油产率；加氢以及催化加氢在分段热解中，在StageI对脂肪族品质的改善不是很明显，只在C13-C25具有轻微的提升作用，StageⅡ在c13-r15StageⅢ在C11-C15则有明显的提升作用；对于非脂肪族在3个阶段分别在C11-C19C9-C18c9-c11明显增加。因此，分段热解、加氢以及催化加氢，对于焦油的产率和品质都有明显的提升作用。

英文摘要：

Multi-stage pyrolysis is an effective way to understand the chemical bonds disruption during coal pyrolysis and improve tar yield. In order to get the product distribution in coalmulti-stage pyrolysis, pyrolysis of Shihezi bituminous coal was studied in a fixed bed reactor. The multi-stage pyrolysis and single stage pyrolysis were performed under N2 and H2 atmosphere to analyse the tar yield, char yield, and the proportion of maltene and asphaltene. Catalytic hydropyrolysis was also investigated with Ni/A1203, Pt/AI~O3 catalysts. The results show that the tar yield decreased with the increasing of the temperature in multi-stage pyrolysis. The tar yield in N2 atmosphere was 4.3%, 0.53%, 0.39% in Stage I, Stage II, Stage III, respectively. Pyrolysis in H2 atmosphere and catalytic hydropyrolysis with Ni, Pt is about 1.2, 3, 2 times than that in N2 atmosphere, respectively. The multi-stage pyrolysis is favored to improve the tar yield. From the tar analysis,it is found that the pyrolysis in H2 atmosphere and catalytic hydropyrolysis have a little effect on aliphatie C13-C25 in Stage I, and at the same time, they can also improve the aliphatic Cll-C15 in Stage If, and C9-C18 in Stage III. Moreover, they also have a positive effect on non-aliphatic fraction. Therefore, multi-stage pyrolysis, pyrolysis in H2 and catalytic hydropyrolysis are favored to improve tar yield and quality.