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Ceramic membranes for catalytic membrane reactors with high ionic conductivities and low expansion properties

United States Patent

November 14, 2000
View the Complete Patent at the US Patent & Trademark Office
Ceramics of the composition: where Ln is an element selected from the fblock lanthanide elements and yttrium or mixtures thereof; B is an element selected from Al, Ga, In or mixtures thereof; M is a d-block transition element of mixtures thereof; 0.01.ltoreq.x.ltoreq.1.0; 0.01.ltoreq.y.ltoreq.0.7; 0.01.ltoreq.z.ltoreq.1.0 and .delta. is a number that varies to maintain charge neutrality are provided. These ceramics are useful in ceramic membranes and exhibit high ionic conductivity, high chemical stability under catalytic membrane reactor conditions and low coefficients of expansion. The materials of the invention are particularly useful in producing synthesis gas.
Mackay; Richard (Lafayette, CO), Sammells; Anthony F. (Boulder, CO)
Eltron Research, Inc. (Boulder, CO)
09/ 366,823
August 4, 1999
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made with Government support under Grant No. DE-FG02-94ER81750 awarded by the Department of Energy. The Government has certain rights in the invention.