典型多环芳烃的加氢反应研究进展

Research progress of hydrogenation of polycyclic aromatics

提高供氢溶剂的供氢能力是煤直接液化技术开发的重点之一,而多环芳烃加氢之后获得的氢化芳烃是煤直接液化的有效供氢溶剂组分。调控加氢深度是提高供氢性能的有效措施。文章介绍了多环芳烃萘、蒽和菲的加氢路径,并介绍了工艺条件和催化剂种类对其加氢产物选择性的影响。芳烃的环数越多,其加氢程度越难;使用CoMo类、NiCl过渡金属类等催化剂和调控加氢条件均有利于生成加氢中间产物,但目前二、三环氢化芳烃的工艺条件开发尚不成熟。此外芳烃加氢反应基本为一级反应,且首环加氢速率最快;加氢平衡常数随温度的升高而降低。将热力学、动力学和分子模拟结合,可实现生产高效氢化芳烃的目的。

Improving donor - hydrogen capacity of recycle solvent has been one important aspect of the direct coal liquefaction ( DCL) process,and hydrogenated polycyclic aromatics are the main effective compositions of recycle solvent. In hence,selective hydrogenation of polycyclic aromatic hydrocarbons is the effective measure to promote the donor - hydrogen capacity. This paper detailed the hydrogenation routes of polycyclic aromatics. And the effect of catalysts and reaction conditions on hydrogenated products was also summarized. The more ring in aromatics,the more difficult it is to hydrogenate. It is beneficial to produce the hydrogenation intermediate with CoMo,NiCl catalysts and optimizing the process conditions. However,the process of hydrogenated polycyclic aromatics is still being developed. Besides,the hydrogenation process is the first-order reaction and the hydrogenate rate of the first ring is the fastest. The hydrogenation equilibrium constantly decreases with the rise of temperature. By combining thermodynamics,kinetics and molecular simulation,it is feasible to generate highly efficient hydrogenated aromatic hydrocarbons.