A series of nickel-tungsten sulfide and nickel-tungsten nitride catalysts are prepared by different pretreatment methods,and characterized by means of techniques such as XRD,Py-IR,HRTEM,elemental analysis,and CO titration.Using decalin as a probe molecule,the influences of different pretreatment methods and different loading amount on the performance of the catalyst for selective ring opening reaction of decalin are investigated in a fixed bed reactor.It is found that Ni-W nitride catalyst delivers higher initial conversion rate and selective ring opening activity than Ni-W sulfide catalyst,because the former has higher metal site activity.Ni-W nitride catalyst exhibits a lower stability than Ni-W sulfide catalyst,which is due to the delayed transfer of decalin to the acidic site for ring opening after dehydrogenation on the metal site.
Ni-W catalystssulfidenitrideselective ring opening of decalin
NETL
NSTL
万方数据
