A series of Rh catalysts on various supports have been applied to H2 production from the bio-ethanol steam reforming reaction. Support plays a very important role on product selectivity at low temperatures (below 450°C). Acidic or basic supports favor ethanol dehydration, while ethanol dehydrogenation is favored over neutral supports at low temperatures. Among the catalysts evaluated in this study, the Rh/Ce-ZrO2 catalyst exhibited the highest H2 yield at 450 °C, which is possibly due to the high oxygen storage capacity of Ce-ZrO2 resulting in efficient transfer of mobile oxygen species from the H2O molecule to the reaction intermediate.
Revised: August 1, 2008 |
Published: July 1, 2008
Citation
Roh H., Y. Wang, and D.L. King. 2008.Selective Production of H2 from Ethanol at Low Temperatures over Rh/ZrO2-CeO2 Catalysts.Topics in Catalysis 49, no. 1-2:32-37.PNNL-SA-46943.