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Science 13 February 2004:
Vol. 303. no. 5660, pp. 993 - 997
DOI: 10.1126/science.1093045
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Reports

Renewable Hydrogen from Ethanol by Autothermal Reforming

G. A. Deluga,1 J. R. Salge,1 L. D. Schmidt,1* X. E. Verykios2

Ethanol and ethanol-water mixtures were converted directly into H2 with ~100% selectivity and >95% conversion by catalytic partial oxidation, with a residence time on rhodium-ceria catalysts of <10 milliseconds.Rapid vaporization and mixing with air with an automotive fuel injector were performed at temperatures sufficiently low and times sufficiently fast that homogeneous reactions producing carbon, acetaldehyde, ethylene, and total combustion products can be minimized.This process has great potential for low-cost H2 generation in fuel cells for small portable applications where liquid fuel storage is essential and where systems must be small, simple, and robust.

1 Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis MN 55455, USA.
2 Department of Chemical Engineering, University of Patras, GR-26500 Patras Greece.

* To whom correspondence should be addressed. E-mail: schmidt{at}cems.umn.edu

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Science. ISSN 0036-8075 (print), 1095-9203 (online)