Study on Catalytic Hydrogenation Reaction of Phenanthrene under Direct Coal Liquefaction Conditions
1. China Shenhua Coal to Liquid and Chemical Shanghai Research Institute, National Engineering Laboratory for Direct Coal Liquefaction, Shanghai 201108, China;
2. Research Institute of Petroleum Processing, East China University of Science and Technology, Shanghai 200237, China
Abstract：In the direct coal liquefaction process of China Shenhua, the heavy aromatic component in the coal liquefied oil is taken as circulating solvent by pre-hydrotreating, which has good hydrogen-supply performance, and the coal direct liquefaction reaction condition is mild with the circulating solvent. In the experiments, phenanthrene was used as a model compound, and the catalytic hydrogenation reactions of phenanthrene were studied on a Ni-Mo/Al2O3 catalyst using a constant-temperature fixed-bed reactor. The effects of different volume space velocity, pressure and temperature on the reaction results were investigated under the conditions of total pressure of 14-20 MPa and reaction temperature of 300-400 ℃, and the analysis with Aspen equilibrium reactor model showed that the hydrogenation reactions did not reach thermodynamic equilibrium under experimental conditions. According to Langmuir-Hinshelwood-Hougen-Watson (LHHW) competitive adsorption theory, the hydrogenation kinetics of phenanthrene reaction system were calculated. The kinetic data indicated that the Ni-Mo/Al2O3 catalyst is beneficial to the deep hydrogenation of phenanthrene under the direct coal liquefaction condition, and the reaction is mainly carried out through the path of phenanthrene→dihydrophenanthrene→octahydrophenanthrene→tetradecahydrophenanthrene. The depth of phenanthrene hydrogenation can be controlled by increasing the space velocity and lowering the reaction temperature appropriately to achieve the purpose of controlling the hydrogenation product distribution of phenanthrene.
WANG Wei 1,SHU Geping 1,ZHANG Xuwen 1 et al. Study on Catalytic Hydrogenation Reaction of Phenanthrene under Direct Coal Liquefaction Conditions[J]. 化学反应工程与工艺, 2019, 35(2): 106-117.
