Abstract
Solid-state reaction in the system of CrOx-Al2O3 and CrOx-LaOx-Al2O3 and their sintering at 500–1100°C were examined by X-ray diffraction, electron spin resonance (ESR) and surface area measurement for the development of heat-stable catalytic ceramic in lean-burn exhaust treatment. CrOx-LaOx-Al2O3 catalyst, even heated at 1000°C in air, showed the removal conversion of 100% for C3H6, 95% for CO and 7% for NO at 500°C for high velocity automotive lean-burn exhaust with A/F = 18 and S.V. = 105h−1. La-modification of catalyst was effective to high surface area stabilization and the improvement of complete oxidation activity of CO and hydrocarbons.
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Ozawa, M., Kato, O. & Suzuki, R. High-temperature structural change of CrOx-LaOx-Al2O3 catalyst for lean-burn exhaust treatment. Journal of Materials Science 38, 2607–2611 (2003). https://doi.org/10.1023/A:1024474316653
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DOI: https://doi.org/10.1023/A:1024474316653