IMPROVEMENT OF THERMAL STABILITY OF COPPER-MANGANESE SPINEL AS ZERO PGM CATALYST FOR TWC APPLICATION
    4.
    发明申请
    IMPROVEMENT OF THERMAL STABILITY OF COPPER-MANGANESE SPINEL AS ZERO PGM CATALYST FOR TWC APPLICATION 审中-公开
    铜二氧化锰螺旋桨热稳定性的改进,用于TWC应用的ZERO PGM催化剂

    公开(公告)号:WO2016069833A1

    公开(公告)日:2016-05-06

    申请号:PCT/US2015/057942

    申请日:2015-10-29

    IPC分类号: B01J23/34 B01J37/02 B01J37/08

    摘要: Effect of the type of ZPGM material composition to improve thermal stability of ZPGM catalyst systems for TWC application is disclosed. ZPGM catalyst system samples are prepared and configured with washcoat on ceramic substrate, overcoat including doped Zirconia support oxide, and impregnation layer including either Cu 1 Mn 2 O 4 spinel or Cu 1 Co 1 Mn 1 O 4 spinel. Testing of ZPGM catalyst samples including variations of aging temperatures and different impregnation layer materials are developed under isothermal steady state sweep test condition for ZPGM catalyst systems to evaluate performance especially NOx conversions and level of thermal stability. As a result disclosed ZPGM catalyst systems with most suitable spinel that includes Cu 1 Co 1 Mn 1 O 4 in impregnation layer exhibit high NOx conversion and significant improved thermal stability compare to Cu 1 Mn 2 O 4 spinel, which is suitable for under floor and close coupled TWC application. The effect of adding Co to Cu-Mn spinel composition to improve thermal stability confirmed by TPR measurement.

    摘要翻译: 公开了ZPGM材料组成的类型,以提高ZPGM催化剂体系对TWC应用的热稳定性的影响。 ZPGM催化剂体系样品在陶瓷基体上制备并配置有涂层,外涂层包括掺杂的氧化锆载体氧化物,以及包含Cu1Mn2O4尖晶石或Cu1Co1Mn1O4尖晶石的浸渍层。 ZPGM催化剂样品的测试包括老化温度和不同浸渍层材料的变化,在ZPGM催化剂体系的等温稳态扫描试验条件下开发,以评估性能,特别是NOx转化率和热稳定性水平。 结果表明,与Cu1Mn2O4尖晶石相比,在浸渍层中包含Cu1Co1Mn1O4的最合适的尖晶石的ZPGM催化剂体系表现出高的NOx转化率和显着的改善的热稳定性,适用于底层和紧耦合的TWC应用。 通过TPR测量证实,添加Co对Cu-Mn尖晶石组合物以提高热稳定性的效果。