Ni-Cu/La2O3催化剂上甲烷部分氧化制合成气

Partial oxidation of methane to syngas over NiCu bimetallic catalysts supported on La2O3 was studied. The catalysts were prepared by wet impregnation with different metal impregnate order and with different contents of Cu while keep Ni 30% constant. The results of the catalytic evaluation in a fixedbed reactor showed that the Ni-Cu/La2O3 had higher activity, the Ni-Cu co-impregnate was superior, and the catalysts with 5%～7% Cu loading had the best catalytic performance. In order to understand the Cu effect, the catalysts were characterized by XRD,TPR and SEM. Through XRD Ni-Cu alloy was observed in the Ni-Cu/La2O3 catalysts, the TPR results suggested that the alloy can reduce NiO at a lower temperature and produce more Ni site.SEM showed that a low carbon deposition was formed on NiCu/La2O3 which exhibited a stable activity.