NiW/beta 5:5 was prepared by impregnating the support contained zeolite-beta with NiW solutions. Hydrocracking (HYC) reactions of tetralin and other hydrocarbons were carried out. NiW/beta 5:5 is more active than the mixture of NiW/Al_2O_3 and beta 5:5. DRIFT spectra of adsorbed NO on various NiW catalysts showed that a kind of interaction species composed of Ni and W is formed on beta 5:5.
