Ethanol steam reforming Ni(II) Al(III) using layered double hydroxide as catalyst precursor . Kinetic Study”

VERÓNICA MÁS; PABLO ARENA; GRACIELA BARONETTI; NORMA AMADEO; MIGUEL LABORDE

Mérica- México

Simposio; Hydrogen Power Theorethical and Engineering Soluctions internacional Symposium (HYPOTHESIS VII; 2007

The kinetic behaviour of the steam reforming reaction using Ni(II)-Al(III) layered double hydroxide (LDH) as catalyst precursor is studied. The carbonate form of Ni(II)-Al(III) LDH (Takovite) was prepared using an homogeneous alkalinization procedure. The H2 yield for ethanol steam reforming using the reduced LDH sample reaches values of 5 mol of H2 per mol of ethanol in the feed. The others products obtained during steady state conditions operating between 823 and 923 K, are CO, CO2 and CH4. It is found that the reaction order respect to ethanol is lower than 1. It is verified that, for each reaction temperature, there is a water/ethanol molar ratio at which ethanol conversion has a maximum. It means that a competition between both reactants adsorbed on the same active sites is verified.