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Functionally gradient material for membrane reactors to convert methane gas into value-added products

United States Patent

5,573,737
November 12, 1996
View the Complete Patent at the US Patent & Trademark Office
Argonne National Laboratory - Visit the Technology Development and Commercialization Website
A functionally gradient material for a membrane reactor for converting methane gas into value-added-products includes an outer tube of perovskite, which contacts air; an inner tube which contacts methane gas, of zirconium oxide, and a bonding layer between the perovskite and zirconium oxide layers. The bonding layer has one or more layers of a mixture of perovskite and zirconium oxide, with the layers transitioning from an excess of perovskite to an excess of zirconium oxide. The transition layers match thermal expansion coefficients and other physical properties between the two different materials.
Balachandran; Uthamalingam (Hinsdale, IL), Dusek; Joseph T. (Lombard, IL), Kleefisch; Mark S. (Napersville, IL), Kobylinski; Thadeus P. (Lisle, IL)
The United States of America as represented by the United States (Washington, DC)
08/ 313,622
September 27, 1994
CONTRACTUAL ORIGIN OF THE INVENTION The United States Government has rights in this invention pursuant to Contract No. W-31-109-ENG-38 between the U.S. Department of Energy and the University of Chicago.