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Title: Miniaturization of a Hydrogen Plant

The development of a miniaturized hydrogen plant is discussed. The micro-scale system is capable of producing 1-5 sccm hydrogen that could be used as a fuel supply in a small fuel cell to produce <1 W power. The paper describes the developmental approach, significant unit operations, material selection, and reactor design. The final microscale fuel processing system is composed of a catalytic combustor, catalytic methanol reformer, selective methanation reactor, and the necessary vaporizers and heat exchangers. The fuel processing system is less than 0.3 cm3 and less than 1 gram mass. Thermal efficiencies as high as 33% for hydrogen production were achieved. When a methanation reactor was incorporated into the system, a carbon monoxide level of less than 100 ppm was reached, but at a reduced system efficiency. Further development work includes increasing efficiency through improved system integration.
Authors:
; ; ; ; ;
Publication Date:
OSTI Identifier:
984258
Report Number(s):
PNNL-SA-42455
17504; TRN: US201015%%913
DOE Contract Number:
AC05-76RL01830
Resource Type:
Book
Resource Relation:
Related Information: Microreactor Technology and Process Intensification, ACS Symposium Series, 914:162-178
Publisher:
Yong Wang and Jamelyn D. Holladay; American Chemical Society, Washington, DC, United States(US).
Research Org:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN; 10 SYNTHETIC FUELS; 30 DIRECT ENERGY CONVERSION; CARBON MONOXIDE; CATALYTIC COMBUSTORS; DESIGN; EFFICIENCY; FUEL CELLS; HEAT EXCHANGERS; HYDROGEN; HYDROGEN PRODUCTION; METHANATION; METHANOL; MINIATURIZATION; PROCESSING microchannel reactors; methanol reforming; hydrogen production; ; Environmental Molecular Sciences Laboratory