Cobalt Containing Bimetallic Zero PGM Catalyst for TWC Applications

• US 20160136619A1
• Filed: 11/17/2014
• Published: 05/19/2016
• Est. Priority Date: 11/17/2014
• Status: Abandoned Application

• Current Assignee: Clean Diesel Technologies, Inc.
• Original Assignee: Clean Diesel Technologies, Inc.
• Inventors: Yaglidere, Oguzhan Selim, Nazarpoor, Zahra, Golden, Stephen J.
• Application Number:
  US14/543,485
• Publication Number:
  US 20160136619A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B01D 2255/20715 Zirconium
• CPC Class Codes: B01D 2255/2073 Manganese
• CPC Class Codes: B01D 2255/20738 Iron
• CPC Class Codes: B01D 2255/20746 Cobalt
• CPC Class Codes: B01D 2255/20761 Copper
• CPC Class Codes: B01D 2255/405 Spinels
• CPC Class Codes: B01D 2255/65 Catalysts not containing noble metals
• CPC Class Codes: B01D 2255/908 O2-storage component incorporated in the catalyst
• CPC Class Codes: B01D 53/945 characterised by a specific catalyst
• CPC Class Codes: B01J 23/005 Spinels
• CPC Class Codes: B01J 23/745 Iron
• CPC Class Codes: B01J 23/75 Cobalt
• CPC Class Codes: B01J 23/8892 Manganese
• CPC Class Codes: B01J 2523/00 Constitutive chemical elements of heterogeneous catalysts
• CPC Class Codes: B01J 2523/17 Copper
• CPC Class Codes: B01J 2523/3718 Praseodymium
• CPC Class Codes: B01J 2523/48 Zirconium
• CPC Class Codes: B01J 2523/72 Manganese
• CPC Class Codes: B01J 2523/842 Iron
• CPC Class Codes: B01J 2523/845 Cobalt
• CPC Class Codes: B01J 35/19 : Catalysts containing parts with different compositions
• CPC Class Codes: B01J 37/0201 : Impregnation
• CPC Class Codes: Y02T 10/12 : Improving ICE efficiencies

Abstract

Variations of bulk powder catalyst material including Cu—Co, Fe—Co, and Co—Mn spinel systems for ZPGM TWC applications are disclosed. The disclosed bulk powder catalyst samples include stoichiometric and non-stoichiometric Cu—Co, Fe—Co, and Co—Mn spinels on Pr₆O₁₁—ZrO₂ support oxide, prepared using incipient wetness method. Activity measurements under isothermal steady state sweep test condition may be performed rich to lean condition. Catalytic activity of bulk powder samples may be compared to analyze the influence that different bimetallic spinel compositions may have on TWC performance, including ZPGM materials for a plurality of TWC applications. Stoichiometric Cu—Co, Fe—Co, and Co—Mn spinel systems exhibit higher catalytic activity than non-stoichiometric Cu—Co, Fe—Co, and Co—Mn spinel systems. The influence of stoichiometric Cu—Co, Fe—Co, and Co—Mn spinel systems may lead into cost effective manufacturing solutions for ZPGM TWC systems.

Claims

1. A catalytic composition, comprising:

an oxygen storage material, comprising;

a binary spinel on a doped zirconia support oxide;

wherein the oxygen storage material converts at least one of NO, CO and HC through oxidation or reduction.

2. The composition of claim 1, wherein the binary spinel is stoichiometric.

3. The composition of claim 1, wherein the binary spinel is non-stoichiometric.

4. The composition of claim 1, wherein the binary spinel comprises Co.

5. The composition of claim 1, wherein the general formula for the binary spinel is selected from the group consisting of Co—

Cu, Co—

Fe, and Co—

Mn.

6. The composition of claim 1, wherein the general formula for the binary spinel is A_XB_3-XO₄, wherein 0<

X>

1.

7. The composition of claim 1, wherein the general formula for the binary spinel is selected from the group consisting of Cu_xCo_3-xO₄, Fe_xCO_3-xO₄ and Co_xMn_3-xO₄.

8. The composition of claim 1, wherein the binary spinel is combined with the support oxide by incipient wetness (IW) method.

9. A catalytic composition, comprising:

an oxygen storage material, comprising;

a ternary spinel on a doped zirconia support oxide;

wherein the oxygen storage material converts at least one of NO, CO and HC through oxidation or reduction.

10. The composition of claim 9, wherein the ternary spinel is stoichiometric.

11. The composition of claim 9, wherein the ternary spinel is non-stoichiometric.

12. The composition of claim 9, wherein the ternary spinel comprises Co.

13. The composition of claim 9, wherein the general formula for the ternary spinel is Cu_xCo_1-xO₄, wherein 0≦

x<

1.0

14. The composition of claim 9, wherein the general formula for the ternary spinel is Fe_xCo_3-xO₄, wherein 0<

x<

1.0

15. The composition of claim 9, wherein the general formula for the ternary spinel is Co_xMn_3-xO₄, wherein 0<

x<

1.0

16. The composition of claim 9, wherein the ternary spinel is combined with the support oxide by incipient wetness (IW) method.