A novel highly efficient catalyst system for the on-board reforming of bio-ethanol to produce fuel cell grade H2 gas at relatively lower temperature was presented. The effect of combination of rhodium and nickel and the nature of support on the catalytic performance in the steam reforming and oxidative steam reforming of ethanol were studied for the first time over these catalysts. Rhodium was more active than nickel in the low temperature range though nickel became as active as rhodium in the high temperature range. H2, CO, CO2 and CH4 were the main products and acetaldehyde was only produced at 335.6°C, which is insufficient for complete C-C bond cleavage. Higher selectivity of H2 was observed for Rh/CeO2 catalyst despite the highest ethanol conversion obtained over Rh-Ni/CeO2. At 335°C, the selectivity for CO2 decreased in the order, Ni/CeO2 > Rh-Ni/CeO2 > Rh/CeO2.
|Original language||English (US)|
|Number of pages||2|
|Journal||Am Chem Soc Div Fuel Chem Prepr|
|State||Published - Sep 2003|
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