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Ceramic wash-coat for catalyst support

United States Patent

August 14, 2012
View the Complete Patent at the US Patent & Trademark Office
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A wash-coat (16) for use as a support for an active catalyst species (18) and a catalytic combustor component (10) incorporating such wash-coat. The wash-coat is a solid solution of alumina or alumina-based material (Al.sub.2O.sub.3-0-3 wt % La.sub.2O.sub.3) and a further oxide exhibiting a coefficient of thermal expansion that is lower than that exhibited by alumina. The further oxide may be silicon dioxide (2-30 wt % SiO.sub.2), zirconia silicate (2-30 wt % ZrSiO.sub.4), neodymium oxide (0-4 wt %), titania (Al.sub.2O.sub.3-3-40% TiO.sub.2) or alumina-based magnesium aluminate spinel (Al.sub.2O.sub.3-25 wt % MgO) in various embodiments. The active catalyst species may be palladium and a second metal in a concentration of 10-50% of the concentration of the palladium.
Kulkarni; Anand A. (Orlando, FL), Subramanian; Ramesh (Oviedo, FL), Sabol; Stephen M. (Venetia, PA)
Siemens Energy, Inc. (Orlando, FL)
11/ 330,555
January 12, 2006
GOVERNMENT INTEREST This invention was made with United States Government support through Contract Number DE-FC28-03NT41891 awarded by the Department of Energy, and, in accordance with the terms set forth in that contract, the United States Government may have certain rights in the invention.