Abstract:

Support for Ni-Pt-B amorphous alloy catalysts was prepared from pseudoboehmite and mordenite. The supported catalysts were then prepared by impregnation-chemical reduction and characterized by XRD，BET and H₂-TPR. Effects of preparation conditions，such as Pt content，alkali concentration of the reduction solvent and impregnation order，on the catalytic performance were studied with benzene hydrogenation to cyclohexane as a probe reaction. Results showed that the addition of trace Pt from chloroplatinic acid can promote the reduction of NiO and improve the catalytic activity. The best catalytic performance was found when the catalyst was made from Ni and Pt co-impregnation and dried before reduction with distilled water as the reduction solvent. At 0.5 MPa of pressure with hydrogen to benzene molar ratio of 4，cyclohexane yeild was achieved to 100% at temperature above 120 ℃ under MHSV of 1.0 h^－1.