Investigation Of Methanol Decomposition With High Activity Metal-based Catalysts

Hydrogen is an ideal clean fuel. Methanol is an important resource for its convenience storage, reformed and free of sulfur. Hydrogen and monoxide from methanol decomposition is one of the promising ways in this aspect.In this paper, methanol decomposition was applied in catalyst test. Supporters, reductive way and copper content were investigated. Concerned with the TPR characterization, the effects were discussed in detail.Alumina-supported copper-nickel based catalysts promoted by different alkali metal oxide and alkaline-earth metal oxide were prepared. The results suggested that the conversion of methanol and selectivity of H2 were higher than that of catalyst samples compared with copper-nickel based catalysts. K2O was the best promoter among the alkali and alkaline-earth metallic oxide. TPR results indicated that K2O intensified the interaction between copper-nickel and supporters. From the results of XRD, K2O dispersed uniformly because there were not K2O phases observed.The addition of different promoters could improve remarkably the selectivity of Cu-Ni/Al2O3 catalysts for methanol decomposition. Both CeO2 and La2O3 were effective promoters. More activity center obtained prepared by co-impregnation method than that of conventional impregnation method. The catalysts with the CeO2 content was 3~5% performed better for methanol decomposition.The catalysts prepared by sol-gel method calcined at 450℃had higher catalytic...