Toshiaki Nozawa, A. Yoshida, S. Hikichi
Mar 22, 2015
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0
Influential Citations
24
Citations
Journal
International Journal of Hydrogen Energy
Abstract
Abstract Effect of addition of rhenium was investigated during catalysis of TiO 2 -supported Rh and Ir metals for aqueous phase reforming of ethanol. By adding Re to Rh/TiO 2 and Ir/TiO 2 catalysts, the initial rates of H 2 , CH 4 , and CO 2 formation increased 3–4 times, together with the extraordinary increase of acetic acid formation. Detailed mechanisms of the reforming reaction were investigated using various physicochemical techniques. The role of added Re was the acceleration of the hydration of acetaldehyde to form acetic acid rather than the decomposition of acetaldehyde to form CH 4 and CO on both Rh/TiO 2 and Ir/TiO 2 catalysts. Well dispersed bimetallic nano-composites would work as the active sites for ethanol dehydrogenation and acetaldehyde decomposition, whereas partially oxidized ReO x sites may work for the hydration of acetaldehyde to form acetic acid.