Effecs of Pt addition upon the activity and stability of supported Ni-B amorphous alloy catalysts for benzene hydrogenation

AM support was prepared by pseudoboehmite and mordenite. A series of Ni-Pt-B/AM amorphous alloy catalysts with different Pt contents were prepared by impregnation-chemical reduction method. The catalysts were characterized by XRD, ESEM, BET, ICP, XPS and H₂-TPR. Benzene hydrogenation was used as probe reaction to evaluate the effect of trace Pt on the catalytic activity and stability of Ni-B/AM amorphous alloy catalyst. The result showed that the addition of Pt promoted the refinement of particles and the reduction of NiO. And the performance of hydrogenation of the catalyst was increased evidencely too. In comparison with the Ni-B/AM catalyst, under the reaction conditions of T=110℃, n_Ni∶n_Pt=150∶1.0, the activity of Ni-Pt-B/AM catalyst was further improved 82.4%. And with the addition of trace Pt, Ni-Pt-B/AM catalyst has a higher sulfur resistance and thermal stability.