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Biomass Conversion to Produce Hydrocarbon Liquid Fuel Via Hot-vapor Filtered Fast Pyrolysis and Catalytic Hydrotreating
Published on: December 25, 2016
Renewable hydrogen from ethanol by autothermal reforming
G A Deluga1, J R Salge, L D Schmidt
1Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis MN 55455, USA.
Science (New York, N.Y.)
|February 14, 2004
Summary
Researchers developed a fast catalytic partial oxidation process to convert ethanol into hydrogen (H2) with high efficiency. This method minimizes unwanted byproducts, offering a promising route for compact, cost-effective H2 generation in fuel cells.
Area of Science:
- Chemical Engineering
- Catalysis
- Renewable Energy
Background:
- Hydrogen (H2) is a clean energy carrier crucial for fuel cells.
- Efficient and cost-effective H2 generation from liquid fuels remains a challenge.
- Catalytic partial oxidation (CPO) offers a potential pathway for H2 production.
Purpose of the Study:
- To investigate the direct conversion of ethanol and ethanol-water mixtures into H2.
- To achieve high conversion and selectivity using catalytic partial oxidation.
- To minimize byproduct formation through rapid reaction kinetics.
Main Methods:
- Utilized rhodium-ceria catalysts for the partial oxidation reaction.
- Employed rapid vaporization and mixing with air using an automotive fuel injector.
- Operated under conditions achieving a catalyst residence time of less than 10 milliseconds.
Main Results:
- Achieved approximately 100% selectivity for H2 production.
- Reached over 95% conversion of ethanol and ethanol-water mixtures.
- Minimized formation of carbon, acetaldehyde, ethylene, and combustion products.
Conclusions:
- Demonstrated a highly efficient and selective method for H2 generation from ethanol.
- The rapid, low-temperature process is suitable for minimizing undesirable side reactions.
- This technology holds significant potential for low-cost H2 production in small, portable fuel cell applications.
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