Thermal stability of sol--gel-derived porous AM-Al{sub x}Zr mixed oxides
The thermal stability of the Al-Zr mixed oxides has been studied over the whole range of composition. The effect of temperature treatment on porosity, crystallinity, and microstructure has been investigated (Ar adsorption isotherms, HR-TEM, EDX, XRD, DRIFTS). The effect of impregnation and doping on the temperature stability of these oxides is shown. An amorphous porous Al-Zr mixed oxide, stabilized with 5% Si oxide and whose microstructure is stable up to 1,400 C with no indication of phase separation or nanocrystal formation, was prepared. The study shows, that amorphous mixed oxides may be a promising new approach to the development of high-temperature stable porous materials, for example for the catalytic NOx removal from the exhaust gas from fossil fuel power plants.
- Research Organization:
- Max-Planck-Inst. fur Kohlenforschung, Ruhr (DE)
- OSTI ID:
- 20001178
- Journal Information:
- Chemistry of Materials, Vol. 11, Issue 9; Other Information: PBD: Sep 1999; ISSN 0897-4756
- Country of Publication:
- United States
- Language:
- English
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