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Improvement in Oxygen Storage Capacity
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English
Abstract
Cerium oxide (Ceria) is known to have good oxygen storage capacity (OSC) and is used widely in three-way catalysts for automobiles, but it has a problem of heat stability since it is less stable than aluminium oxide (Alumina).
In the present work, cerium-zirconiumyttrium (Ce-Zr-Y) oxide systems were investigated with the aim of improving the heat stability of CeO2-based oxide systems, which would result in great improvement in OSC.
We found an optimum composition of Ce-Zr-Y oxide with platinum (Pt) dispersed in it at a quantity of 0.1 % in weight, which showed good OSC starting from 100°C upwards even after thermal aging at 1000°C for 2 hours under variable atmospheric conditions of rich-lean fluctuations.
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Citation
Tanaka, H. and Yamamoto, M., "Improvement in Oxygen Storage Capacity," SAE Technical Paper 960794, 1996, https://doi.org/10.4271/960794.Also In
References
- Tanaka H. Fujikawa H. Takahashi I. “Perovskite-Pd Three-Way Catalysts for Automotive Applications” SAE Paper 930251 1993
- Tanaka H. Fujikawa H. Takahashi I. “Excellent Oxygen Storage Capacity of Perovskite-Pd Three-Way Catalysts” SAE Paper 950256 1995
- Kubsh J.E. Rieck J.S. Spencer N.D. “Cerium Oxide Stabilization: Physical Property and Three-Way Activity Considerations” Crucq A. Catalysis and Automotive Pollution Control II, Elsevier Science Publishers B.V. Amsterdam 125 138 1991
- Diwell A.F. Rajaram R.R. Shaw H.A, Truex T.J. “The Role of Ceria in Three-Way Catalysts” Crucq A. Catalysis and Automotive Pollution Control II, Elsevier Science Publishers B.V. Amsterdam 139 152 1991
- Ozawa M. Kimura M. Isogai A. “The Application of Ce-Zr Oxide Solid Solution to Oxygen Storage Promoters in Automotive Catalysts” Jour. Alloys and Comp. 193 73 75 1993