发明授权
US09433930B2 Methods for selecting and applying a layer of Cu—Mn spinel phase to ZPGM catalyst systems for TWC application
有权
选择和应用一层Cu-Mn尖晶石相到ZPGM催化剂体系用于TWC应用的方法
- 专利标题: Methods for selecting and applying a layer of Cu—Mn spinel phase to ZPGM catalyst systems for TWC application
- 专利标题(中): 选择和应用一层Cu-Mn尖晶石相到ZPGM催化剂体系用于TWC应用的方法
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申请号: US14090809申请日: 2013-11-26
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公开(公告)号: US09433930B2公开(公告)日: 2016-09-06
- 发明人: Zahra Nazarpoor
- 申请人: Clean Diesel Technologies, Inc.
- 申请人地址: US CA Oxnard
- 专利权人: Clean Diesel Technologies, Inc. (CDTi)
- 当前专利权人: Clean Diesel Technologies, Inc. (CDTi)
- 当前专利权人地址: US CA Oxnard
- 代理机构: Alston & Bird LLP
- 主分类号: B01J21/04
- IPC分类号: B01J21/04 ; B01J23/24 ; B01J23/72 ; B01J23/889 ; B01J37/02 ; B01J23/00 ; B01D53/94 ; B01J37/03
摘要:
The present disclosure relates to selecting the layer of applying ZPGM active phase in washcoat, or applying ZPGM active phase in overcoat, for achieving optimized performance and enhanced thermal stability. Applying ZPGM active phase catalyst in overcoat shows improvements compare to applying ZPGM active phase in washcoat. The selected active phase material may include a chemical composition that is substantially free from PGM, including a formulation of stoichiometric Cu—Mn spinel structure active phase deposited on Niobium-Zirconium support oxide. The selected active phase layer applied in overcoat may include a washcoat of alumina coated on a suitable ceramic substrate. The disclosed active phase may be applied in overcoat to maximize efficiency of catalyst systems, which may exhibit enhanced catalytic activity properties, which may stable after aging and under steady state and oscillating condition, showing optimized performance purifying gases in TWC condition.