Bimetallic catalysts performance during ethanol steam reforming: Influence of support materials

摘要

Ni-Cu catalysts supported on different materials were tested in ethanol steam reforming reaction for hydrogen production. These catalysts were evaluated at reaction temperature of 400 ℃ under atmospheric pressure. The reagents, with a water/ethanol molar ratio equal to 10, were fed at 70 dm~3/(h g_(cat)) (after vaporization). Analysis of the ethanol conversion, as well as evaluation and quantification of the reaction products, indicated the catalyst 10% Ni-1% Cu/Ce_(0.6)Zr_(0.4)O_2 as the most appropriate for the ethanol steam reforming under investigated reaction conditions, among the studied catalysts. During 8 h of reaction this catalyst presented an average ethanol conversion of 43%, producing a high amount of H_2 by steam reforming and by ethanol decomposition and dehydrogenation parallel reactions. Steam reforming, among the observed reactions, was quantified by the presence of carbon dioxide. About 60% of the hydrogen was produced from ethanol steam reforming and 40% from parallel reactions.