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PROCESS FOR PRODUCING CERIA-ZIRCONIA-ALUMINA COMPOSITE OXIDES AND APPLICATIONS THEREOF
PROCESS FOR PRODUCING CERIA-ZIRCONIA-ALUMINA COMPOSITE OXIDES AND APPLICATIONS THEREOF
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机译:铈-锆-铝-复合氧化物的制备方法及其应用
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摘要
A process for producing a ceria-zirconia-alumina composite oxide is disclosed. The process comprises combining a cerium (IV) compound and a zirconium (IV) compound with a slurry of aluminum oxide at a temperature greater than 40° C. to produce a reaction slurry, then contacting the reaction slurry with a precipitating agent to precipitate insoluble cerium and zirconium compounds onto the aluminum oxide and form cerium-zirconium-aluminum oxide particles, and calcining the cerium-zirconium-aluminum oxide particles to produce a ceria-zirconia-alumina composite oxide. The process to produce ceria-zirconia-alumina composite oxides provides a material having a high oxygen storage/release capacity that is suitable for a catalyst with enhanced cleaning of the exhaust gases from internal combustion engines.
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