富芳烃重油组分结构调变对中间相沥青形成的影响机制

对重油富芳烃组分转化为次生沥青及其氢化改性沥青的热转化行为进行了比较，并对热转化过程中体系化学结构组成特征对中间相形成的影响进行了研究。采用红外光谱及氢核磁共振波谱，对比分析了次生沥青及其氢化改性沥青的化学结构组成特征；借助偏光显微镜、X射线衍射，考察了两体系中间相沥青的形成过程。结果表明：控制体系短烷基侧链含量可有效抑制过度炭化的发生，提高炭化产物的微观有序度；短烷基侧链可以持续稳定释放出小分子自由基，对大分子自由基反应进行调控，显著提升炭化产物微观结构的均一性。

EFFECT OF CHEMICAL STRUCTURE MODIFICATION OF AROMATICS-RICH HEAVY OIL ON MESOPHASE PITCH FORMATION

The thermal conversion behavior of aromatics-rich heavy oil to secondary asphalt and its hydrogenated asphalt were compared, and the influence of chemical structure on mesophase formation during thermal conversion was studied. The chemical structure and composition of the secondary asphalt and the hydrogenated secondary asphalt were analyzed by FTIR, the results were compared with those by polarized light microscopy and XRD, and the formation process of mesophase pitch in two systems was investigated. The results show that controlling the content of short alkyl side chain can effectively inhibit the occurrence of over carbonization and improve the microcosmic ordering degree of carbonized products, the short alkyl side chain can release small molecular free radicals stably, and the control of macromolecular radical significantly improves the homogeneity of the microstructure of carbonized products.