Study of y zeolite catalysts for coal tar hydro-cracking in supercritical gasoline

For coal tar hydrocracking process in supercritical gasoline, it requires a new catalyst with high activity under low temperature conditions to improve the light oil yield. The effects of Mo-Co-Y and Mo-Ni-Y series catalyst on the light oil yield were investigated in this paper, and the coke deposition on catalyst and catalyst stability were also investigated. Experimental results show that the Mo-Co-Pd-Y zeolite catalyst with a suitable Co/(Co+Mo) atom ratio and calcination temperature could maximize the light oil yield, and the acid amount of the catalyst is closely related to its activity. Coke deposition on the Mo-Co-Pd-Y zeolite catalyst is very little and the catalyst remains high activity within used time of 8 h.