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Catalyst support of mixed cerium zirconium titanium oxide, including use and method of making

United States Patent

January 18, 2011
View the Complete Patent at the US Patent & Trademark Office
A durable catalyst support/catalyst is capable of extended water gas shift operation under conditions of high temperature, pressure, and sulfur levels. The support is a homogeneous, nanocrystalline, mixed metal oxide of at least three metals, the first being cerium, the second being Zr, and/or Hf, and the third importantly being Ti, the three metals comprising at least 80% of the metal constituents of the mixed metal oxide and the Ti being present in a range of 5% to 45% by metals-only atomic percent of the mixed metal oxide. The mixed metal oxide has an average crystallite size less than 6 nm and forms a skeletal structure with pores whose diameters are in the range of 4-9 nm and normally greater than the average crystallite size. The surface area of the skeletal structure per volume of the material of the structure is greater than about 240 m.sup.2/cm.sup.3. The method of making and use are also described.
Willigan; Rhonda R. (Manchester, CT), Vanderspurt; Thomas Henry (Glastonbury, CT), Tulyani; Sonia (Manchester, CT), Radhakrishnan; Rakesh (Vernon, CT), Opalka; Susanne Marie (Glastonbury, CT), Emerson; Sean C. (Broad Brook, CT)
UTC Power Corporation (South Windsor, CT)
11/ 803,481
May 15, 2007
The U.S. Government has a paid-up license in this invention and the right in limited circumstances to require the patent owner to license others on reasonable terms as provided for by the terms of (contract No. DE-FC26-05NT42453) awarded by the Department of Energy.