Pt对负载型Ni-B非晶态合金苯加氢活性及稳定性的影响

以拟薄水铝石、丝光沸石为原料制备载体AM,采用浸渍-化学还原法制备了不同Pt含量的Ni-Pt-B/AM非晶态合金催化剂,并运用XRD、ESEM、BET、ICP、XPS和H2 -TPR等手段对催化剂进行表征.以苯加氢制环己烷反应为探针,考察了微量Pt对Ni-B/AM非晶态合金催化剂加氢活性及稳定性的影响.结果表明,Ni-...

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.