Abstract: Ni-Mo catalysts with modified Beta,Y, ZSM-5 zeolites as carriers were prepared by equal volume impregnation method and named as CAT-B, CAT-Y and CAT Z, respectively. The catalysts were characterized by XRD, BET, NH3-TPD, Py-FTIR and H2-TPR techniques. The influence of different zeolite catalysts on activity and product selectivity for tetralin hydrocracking were investigated on a fixed bed continuous hydrogenation device. The results showed that CAT-B catalyst has a specific pore structure and surface area and higher L acid and B acid content than CAT-Y and CAT-Z catalysts. The weaker interaction between the carrier and active metals of CAT-B is beneficial to the dispersion of the metals. The order of conversion rate for tetralin hydrocracking is CAT-B> CAT-Y> CAT-Z. Moreover, the CAT-B catalyst has the highest selectivity to BTX and cracking products and the lowest selectivity to the condensation products at the same conversion rate of tetralin.

Key words: tetralin, zeolite, hydrocracking, catalyst