Ceria zirconia alumina composition with enhanced thermal stability

Ceria zirconia alumina composition with enhanced thermal stability

The invention relates to a calcined mixed oxide comprising Al-, Ce- and Zr-oxides. The mixed oxide comprises by weight: 5-90% of cerium, 20-80% of aluminum, 5-80% of zirconium and 0-12% of rare earth metal (RE), wherein cerium, zirconium, aluminum and rare earth metal are calculated in the form of C...

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Bibliographische Detailangaben
Hauptverfasser: ALBER FRANK, SCHONEBORN MARCOS, ROLFS SONKE, GLOCKLER REINER, DALLMANN KAI, SAGAR AMOD, SCHERMANZ KARL
Format: Patent
Sprache:chi ; eng
Schlagworte:
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
THEIR RELEVANT APPARATUS
TRANSPORTING
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Beschreibung
Zusammenfassung:The invention relates to a calcined mixed oxide comprising Al-, Ce- and Zr-oxides. The mixed oxide comprises by weight: 5-90% of cerium, 20-80% of aluminum, 5-80% of zirconium and 0-12% of rare earth metal (RE), wherein cerium, zirconium, aluminum and rare earth metal are calculated in the form of CeO2, ZrO2, Al2O3 or RE2O3 respectively, and and the calcined mixed oxide has a surface area (BET) over 20m /g when being processed for four hours at the temperature of 1200 DEG C. 本发明涉及包含Al-氧化物、Ce-氧化物和Zr-氧化物的经煅烧的混合氧化物，其中所述混合氧化物包含：5-90重量%的铈，20-80重量%的铝，5-80重量%的锆，和0-12重量%的稀土金属(RE)，其中铈、锆、铝和稀土金属分别以CeO、ZrO、AlO或REO形式计算并且其中当在1200℃下处理4小时时所述经煅烧的混合氧化物具有超过20 m/g的表面积(BET)。