Ethanol steam reforming using Ni(II)-Al(III) layered double hydroxide as catalyst precursor. Kinetics study

V. MAS, P. ARENA, G. BARONETTI, N. AMADEO, M. LABORDE

Mérida

Congreso; Hypothesis VII; 2007

Sociedad Mexicana del Hidrógeno

The kinetic behaviour of ethanol steam reforming is studied using a Ni(II) Al(III) lamellar double hydroxide (LDH) as catalyst precursor. Ni/Al precursor is synthesized by means of homogeneous precipitation by urea. From ethanol steam reforming 5 moles of H2 are yielded per mole of ethanol fed (to the reactor). CO, CO2 and traces of CH4 are also obtained. A parallel kinetic set is capable to describe the product distribution obtained. A maximum ethanol conversion as function of water concentration in the feed was found. This result reveals the existence of competitiveness between both reactants to be absorbed in the same active site. Assuming power law, kinetic parameters were fitted for both reactions involved in an operation range where reaction rate was assumed to be independent of water concentration. Ethanol orders were found to be lower than 1.