煤热解与甲烷二氧化碳重整耦合(CP-CRM)过程是提高焦油产率的重要方法之一。煤的显微组分组成是影响煤热解反应过程的因素之一，N2气氛下的显微组分热解过程已有较为深入的研究，但显微组分在CP-CRM过程中的热解行为规律尚待研究。通过固定床实验探讨不同反应温度和气氛对显微组分热解产物分布规律的影响，对比研究了甲烷二氧化碳重整(CRM)与N2气氛下大柳塔原煤及显微组分热解特性的差异。通过模拟蒸馏、核磁共振和GC-MS等表征方法对焦油进行分析，认识显微组分结构对热解焦油组成的影响。结果表明，在N2气氛下，镜质组和惰质组展现出不同的反应特性，镜质组热解焦油产率明显高于惰质组，主要归结于显微组分结构的差异导致的反应性不同。CRM气氛能显著提高热解焦油的产率，尤其对惰质组的作用效果最明显，使惰质组的焦油产率相比N2气氛提高16%，主要归结于CRM过程产生的自由基参与煤热解反应。焦油组成分析表明，在N2气氛下得到的热解焦油中，镜质组具有较高比例的脂肪类物质，惰质组具有较高比例的芳香类物质;CRM气氛下焦油中1~2环芳香烃的比例提高，轻质组分中蒽油的相对

The integrated process of coal pyrolysis with CO2 reforming of methane (CP-CRM) is one of the most im- portant routes to improve tar yield. The composition of coal macerals is one of the factors affecting the pyrolysis reaction process. However,there is a lack of research on the pyrolysis behavior of macerals in the CP-CRM process. This work studied the differences of pyrolysis characteristics of Daliuta raw coal and its macerals under N2 and CRM atmosphere. The effects of different reaction temperatures and atmospheres on the distribution of pyrolysis products of macerals were investigated on a fixed bed pyrolysis apparatus. The obtained pyrolysis tar was analyzed by simulated distillation,NMR and GC-MS to understand the effect of the structure of macerals on the composition of tar. The results show that the vitrinite and inertinite exhibit different reaction characteristics under N2 atmosphere. The tar yield of vitrinite is signifi- cantly higher than that of inertinite,which is mainly attributed to the difference in the reactivity caused by the differ- ence in the structure of macerals. The CRM atmosphere could obviously increase tar yield. In comparison,the enhancement effect is more pronounced when the inertinite is used,and the tar yield of inertinite is increased by 16% com- pared with that under N2 atmosphere,which is mainly ascribed to the participation of free radicals from CRM. The a- nalysis of tar composition shows that the vitrinite pyrolysis tar contains higher aliphatics,while inertinite pyrolysis tar includes more aromatics under N2 atmosphere. Under the CRM atmosphere,the content of light aromatic hydrocarbons is greatly increased,especially,the content of anthracene oil is most remarkably enhanced,and the content of tricyclic and tetracyclic aromatic hydrocarbons in the inertinite pyrolysis tar is obviously decreased.