Stable, highly active perovskite catalysts for complete oxidation at high temperatures, and the process for their preparation
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United States of America Patent
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Issued Date -
Mar 21, 2002
app pub date -
Jun 18, 2001
filing date -
Sep 3, 1998
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Abandoned
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Abstract
Thermostable metal oxide catalysts of the general formula ABMO.sub.3-.delta., having a perovskite crystal structure and the process of making the same. A, B and M are metal cations. M acts as a doping of site B in an amount of about 0.01 to about 0.30. Cations A, B and M are so chosen as to assure a depletion in oxygen represented by .delta. of at least 0.02. The catalysts according to the present invention show good catalytic properties even at temperatures above 1300 .degree. C. Stable, highly active perovskite catalysts for complete oxidation at high temperatures, and the process for their preparation.
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