Deterioration of Three-Way Automotive Catalysts, Part II - Oxygen Storage Capacity at Exhaust Conditions

1993 ◽  
Author(s):  
Gudmund Smedler ◽  
Sören Eriksson ◽  
Magnus Lindblad ◽  
Hans Bernler ◽  
Staffan Lundgren ◽  
...  
Keyword(s):  
Storage Capacity ◽  
Oxygen Storage Capacity ◽  
Oxygen Storage ◽  
Automotive Catalysts

Oxygen Storage Capacity (OSC) Measurement of 3-Way Automotive Catalysts Using the CATAGEN OMEGA Test Reactor

2021 ◽  
Author(s):  
Liam Mc Grane ◽  
Roy Douglas ◽  
Kurtis Irwin ◽  
Andrew Woods ◽  
Jonathan Stewart ◽  
...  
Keyword(s):  
Storage Capacity ◽  
Oxygen Storage Capacity ◽  
Oxygen Storage ◽  
Automotive Catalysts ◽  
Test Reactor

Measurement of oxygen storage capacity in automotive catalysts

2003 ◽  
Vol 217 (8) ◽  
pp. 727-733 ◽  
Author(s):  
T Khossusi ◽  
R Douglas ◽  
G McCullough
Keyword(s):  
Storage Capacity ◽  
Theoretical Calculations ◽  
Specific Capacity ◽  
Oxygen Storage Capacity ◽  
Reaction Rates ◽  
Oxygen Storage ◽  
Storage Process ◽  
Experimental Procedure ◽  
Automotive Catalysts ◽  
Series Of Experiments

There is considerable disagreement in the literature on available oxygen storage capacity, and on the reaction rates associated with the storage process, for three-way automotive catalysts. This paper seeks to address the issue of oxygen storage capacity in a clear and precise manner. The work described involved a detailed investigation of oxygen storage capacity in typical samples of automotive catalysts. The capacity has also been precisely defined and estimates have been made of the specific capacity based on catalyst dimensions. A purpose-built miniature catalyst test rig has been assembled to allow measurement of the capacity and the experimental procedure has been developed to ensure accurate measurement. The measurements from the first series of experiments have been compared with the theoretical calculations and good agreement is seen. A second series of experiments allowed the e ect of temperature on oxygen storage capacity to be investigated. This work shows very clearly the large variation of the capacity with temperature.

Autothermal Reforming of Propane Over Ni Catalysts Supported on a Variety of Perovskites

2007 ◽  
Vol 7 (11) ◽  
pp. 4013-4016 ◽  
Author(s):  
SeungSoo Lim ◽  
DongJu Moon ◽  
JongHo Kim ◽  
YoungChul Kim ◽  
NamCook Park ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Storage Capacity ◽  
Flow Reactor ◽  
Oxygen Storage Capacity ◽  
Autothermal Reforming ◽  
Oxygen Storage ◽  
Hydrogen Yield ◽  
Impregnation Method ◽  
Ni Catalysts ◽  
Atmospheric Flow

Autothermal reforming of propane for hydrogen over Ni catalysts supported on a variety of perovskites was performed in an atmospheric flow reactor. Perovskite is known for its higher thermal stability and oxygen storage capacity, but catalytic activity of itself is low. A sites of the ABO3 structured perovskites were occupied by La while B sites by one of Fe, Co, Ni, and Al by citrate method. The composition of the reactant mixture was H2O/C/O2 = 8.96/1.0/1.1. The changes in the states of the catalysts after reaction were analyzed by XRD, TPD, and TGA. Ni/LaAlO3 catalyst maintained the perovskite structure after reaction. It showed higher hydrogen yield and thermal stability compared to those of the catalysts with Fe, Co, or Ni in B sites. Catalysts prepared by deposition-precipitation (DP) method showed higher activity than those prepared by impregnation method, presumably due to the smaller sizes of the NiO crystal particles.

Mn3O4 doped with highly dispersed Zr species: a new non-noble metal oxide with enhanced activity for three-way catalysis

2016 ◽  
Vol 40 (12) ◽  
pp. 10108-10115 ◽  
Author(s):  
Genyuan Zhao ◽  
Jing Li ◽  
Wenshuang Zhu ◽  
Xueqin Ma ◽  
Yonghua Guo ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Manganese Oxide ◽  
Noble Metal ◽  
Storage Capacity ◽  
Catalytic Properties ◽  
Oxygen Storage Capacity ◽  
Oxide Catalysts ◽  
Oxygen Storage ◽  
Highly Dispersed ◽  
Three Way Catalysis

Herein, we demonstrate the influence of zirconium species on promoting the oxygen storage capacity and three-way catalytic properties of zirconium-manganese oxide catalysts.

Oxygen storage capacity of monolith three-way catalysts

1985 ◽  
Vol 17 (1) ◽  
pp. 75-86 ◽  
Author(s):  
E.C. Su ◽  
C.N. Montreuil ◽  
W.G. Rothschild
Keyword(s):  
Storage Capacity ◽  
Oxygen Storage Capacity ◽  
Oxygen Storage

Influence of transition metal electronegativity on the oxygen storage capacity of perovskite oxides

2016 ◽  
Vol 52 (68) ◽  
pp. 10369-10372 ◽  
Author(s):  
Lu Liu ◽  
Daniel D. Taylor ◽  
Efrain E. Rodriguez ◽  
Michael R. Zachariah
Keyword(s):  
Transition Metal ◽  
Storage Capacity ◽  
Oxygen Storage Capacity ◽  
Perovskite Oxides ◽  
Oxygen Storage ◽  
Chemical Looping Combustion ◽  
Chemical Looping ◽  
Oxygen Carriers ◽  
Practical Development ◽  
Selection Of

The selection of highly efficient oxygen carriers (OCs) is a key step necessary for the practical development of chemical looping combustion (CLC).

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