Methanol Steam Reforming Over NiAl and Ni (M) Al LayeredDouble Hydroxides (M = Au, Rh, Ir) Derived Catalysts

This paper deals with an experimental investigation concerning steam reforming of methanol at 280, 340 and 380 °C over NiAl and Ni (Au, Rh or Ir)Al layered double hydroxides (LDHs) derived catalysts. Incorporation of noble metal ions into the NiAl-LDH framework was evidenced by XRD, TGA and TEM techniques. High selectivity to H₂ and CO₂ with less than 5% (volume) CO and trace CH₄ was observed over the NiAl-LDH catalyst. Whereas CO and H₂ are major products at lower temperatures after addition of Au, Rh and Ir to the NiAl-LDH system. They are significantly reduced with the concomitant increase in CH₄ and CO₂ as the temperature increased.