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Compositions based on zirconium oxide, yttrium oxide and tungsten oxide, preparation methods and use as catalysts or catalyst supports
Compositions based on zirconium oxide, yttrium oxide and tungsten oxide, preparation methods and use as catalysts or catalyst supports
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机译:基于氧化锆,氧化钇和氧化钨的组合物,制备方法和用作催化剂或催化剂载体的用途
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摘要
Compositions based on zirconium oxide, including 1 to 20% yttrium oxide, 1 to 30% tungsten oxide and the balance zirconium oxide, have a specific surface area of at least 40 m2/g after calcination at 700° C. for 4 hours and an acidity measured by the methylbutynol test of at least 90%, and are useful as catalyst or catalyst supports, especially for the treatment of motor vehicle exhaust gases.
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