高温煤焦油加氢裂解反应动力学研究

LUMPING KINETIC MODEL OF HIGH TEMPERATURE COAL TAR HYDROCRACKING

在360℃～400℃,氢气初压1MPa～2.5MPa,5min～40min以及0.5～3剂油比条件下,在自制的间歇式反应器上对高温煤焦油在超临界二甲苯中加氢裂解的宏观反应动力学进行了研究,建立起三集总宏观反应动力学模型.结果表明,该模型能较好反应高温煤焦油在超临界二甲苯中加氢裂解行为.在本实验条件下高温煤焦油在超临界二甲苯中加氢裂解反应时裂化反应的表观压力指数为-0.2111,表观剂油比指数为0.4033,表观活化能为15.765kJ/mol,指前因子为2.722min-1.MPa(0.2111);缩合反应的表观压力指数为-0.2884,表观剂油比指数为-0.4459,表观活化能为30.762kJ/mol,指前因子为18.952min-1.MPa(0.2884);总反应的表观压力指数为0.1609,表观剂油比指数为0.2265,表观活化能为39.049kJ/mol,指前因子为204.226min-1.MPa(-0.1609).

In the condition of 360 ℃-400 ℃, hydrogen pressure 1 MPa-2.5 MPa, residence time 5 min-40 rain, and ratio of xylene to coal tar 0.5-3, reaction kinetics study of high temperature coal tar hydrocracking in supercritical xylene were investigated in hatch reactor. The pressure index of cracking reaction was -0. 211 1, ratio of xylene to coal tar index was 0.403 3, pre-exponential factor was 2. 722 min^-1· MPa（0. 211 1）, and activity energy was 15. 765 kJ/ tool; The pressure index of condensation reaction was -0. 288 4, ratio of xylene to coal tar index was -0. 445 9, pre-exponential factor was 18. 952 min· MPa（0. 288 4）, and activity energy was 30. 762 kJ/mol; The pressure index of total reaction was 0. 160 9, ratio of xylene to coal tar index was 0. 226 5, pre-exponential factor was 204. 226 min^-1·MPa（-0. 160 9）, and activity energy was 39.049 kJ/mol.