Abstract
In this work, the mesophase pitch was generated from the thermal condensation of the petroleum aromatic-rich fraction. Tetrahydronaphthalene as a hydrogen donor was selected to treat the condensation intermediate using the in-process hydrogenation method. The objective of this work was to investigate the effects of in-process hydrogenation on the formation and development of mesophase structures. Results showed that the intermediate after in-process hydrogenation possessed a more-uniform molecular structure and narrower molecular-weight distribution, compared to the blank intermediate without in-process hydrogenation, which was attributed to the increasing content of naphthenic structures in the intermediate. From the characterization analysis of carbonized products, it can be found that the in-process hydrogenation of the condensation intermediate was conducive to the generation of mesophase pitch with a large domain structure, narrow molecular-weight distribution, low softening point, and carbon residue.
Published Version
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