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

Patent ·
OSTI ID:1013050
 [1];  [2];  [1];  [3];  [2];  [4]
  1. Manchester, CT
  2. Glastonbury, CT
  3. Vernon, CT
  4. Broad Brook, CT
+ Show Author Affiliations
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.
Research Organization:
UTC Power Corporation (South Windsor, CT)
Sponsoring Organization:
USDOE
DOE Contract Number:
FC26-05NT42453
Assignee:
UTC Power Corporation (South Windsor, CT)
Patent Number(s):
7,871,957
Application Number:
11/803,481
OSTI ID:
1013050
Country of Publication:
United States
Language:
English

References (10)

Coprecipitation and Hydrothermal Synthesis of Ultrafine 5.5 mol% CeO2-2 mol% YO1.5ZrO2 Powders journal January 1997
The preparation of high surface area CeO2–ZrO2 mixed oxides by a surfactant-assisted approach journal August 1998
Marked addition effect of Re upon the water gas shift reaction over TiO2 supported Pt, Pd and Ir catalysts journal February 2006
Catalytic oxidation of methane over CeO2-ZrO2 mixed oxide solid solution catalysts prepared via urea hydrolysis journal August 2002
Structure characterization of Pt-Re/TiO2 (rutile) and Pt-Re/ZrO2 catalysts for water gas shift reaction at low-temperature journal April 2006
Structural characterization and mixed conductivity of TiO2-doped ceria stabilized tetragonal zirconia journal January 2002
Reactant-Promoted Reaction Mechanism for Water-Gas Shift Reaction on Rh-Doped CeO2 journal May 1993
Relationship between the Zirconia-Promoted Reduction in the Rh-Loaded Ce0.5Zr0.5O2Mixed Oxide and the Zr–O Local Structure journal June 1997
Studies of the water-gas-shift reaction on ceria-supported Pt, Pd, and Rh: Implications for oxygen-storage properties journal January 1998
Diffusionless Tetragonal-Cubic Transformation Temperature in Zirconia-Ceria Solid Solutions journal November 1993

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36 MATERIALS SCIENCE