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A Novel Two-Step Hydrogen Cycled Methane Reforming Process

Published online by Cambridge University Press:  01 February 2011

Richard Breitkopf
Affiliation:
rbreitkopf@ngimat.com, nGimat, 5315 Peachtree Industrial Blvd, Atlanta, GA, 30341, United States, 678-287-2486, 678-287-3999
Yardlynne Smalley
Affiliation:
ysmalley@ngimat.com
Zhong-Lin Wang
Affiliation:
zhong.wang@mse.gatech.edu, Georgia Institute of Technology
Robert Snyder
Affiliation:
Robert.Snyder@mse.gatech.edu, Georgia Institute of Technology
Michael Haluska
Affiliation:
michael.haluska@gatech.edu, Georgia Institute of Technology
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Abstract

We have prepared novel transition metal fluorite materials for a 2-step hydrogen reformer process that generates low CO hydrogen for fuel cell applications. The nanopowder materials, which are converted to an oxygen vacancy rich form in the first step of the process using methane or any hydrocarbon fuel are subsequently brought back to their original state using water vapor while generating pure hydrogen in the process. We have observed large weight losses in TGA measurements below 500°C with our nanomaterials that we do not observe in similar powders with larger grain size that comprise an efficient low temperature first step. We have also observed decreases in lattice parameter in high temperature XRD measurements consistent with formation of a high concentration of oxygen vacancies. The process has produced fuel efficiencies as high as 65% with typical CO content below 30 ppm using methane fuel. Additionally, since we are using nanomaterials, we have enabled low temperature hydrogen generation with good cycling stability at 500°C.

Type
Research Article
Copyright
Copyright © Materials Research Society 2006

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References

REFERENCES

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