研究悬浮床加氢过程中供氢溶剂性能与煤焦油沥青加氢裂化反应间的关系。考察了反应温度和初始压力对供氢溶剂油预加氢深度的影响，探讨了供氢溶剂对高温煤焦油沥青加氢反应中沥青质裂化作用机理。结果表明，随着加氢反应程度的增加（初始氢气压力增加、反应温度增加），供氢溶剂油的芳碳率逐渐降低；在初始氢气压力10 MPa、反应温度350℃的加氢工艺条件下，可得到芳碳率为0.42的理想供氢溶剂。在煤焦油沥青加氢反应过程中，随着供氢溶剂添加量的增加，大于350℃重油馏分的收率有所降低；生成的重油中胶质、沥青质的质量分数明显降低，转化率分别由64.00%和82.61%提高到了81.98%和89.21%；芳烃质量分数大幅度增加，说明供氢溶剂对胶质和沥青质的加氢裂化具有促进作用。

The correlation between the hydrogen-donating capacity of solvent and hydrocracking performance of coal tar pitch is systematically studied based on the suspension bed hydrogenation process.The influences of reaction temperature and initial pressure on hydrogenation depth in the preparation of hydrogen donor solvent oil and the effect of hydrogen donor solvent on the hydrogenation of high-temperature coal tar pitch are investigated.The results show that with the increasing hydrotreating reaction degree (initial hydrogen pressure and reaction temperature),the aromatic carbon fraction decreases gradually.An ideal hydrogen donor solvent with an aromatic carbon ratio of 0.42 is obtained under the initial hydrogen pressure of 10 MPa and reaction temperature of 350℃.During the hydrogenation of coal tar pitch,the yield of heavy oil fraction higher than 350℃ decreases with the rising amount of hydrogen-donor solvent while the contents of colloid and asphaltene in the heavy oil decline significantly,and the conversion rates increase from 64.00 wt% and 82.61 wt% to 81.98 wt% and 89.21 wt%,respectively.In addition,the aromatic content increases greatly,indicating that the hydrogen-donor solvent can strongly facilitate the hydrocracking behavior of colloid and asphaltene fractions.

张登跃(1965-),男,硕士研究生,高级工程师,研究方向为煤化工,kssjts@163.com;林雄超(1982-),男,博士,副教授,博士生导师,主要从事能源化工及煤沥青材料方面的研究,linxiongchao@163.com。