High Temperature Stability of Ceria-Zirconia Supported Pd Model Catalysts 980668
A series of ceria and ceria-zirconia supported Pd model automotive catalysts were prepared and aged under air or redox conditions at 1050°C for 12 h. The supports were manufactured by different methods and represent a range of compositions. The samples were characterized before and after aging by BET, X-ray diffraction, mercury porosimetry, XPS, H2 temperature-programmed reduction, and oxygen storage capacity measurements. Oxygen storage measurements revealed that the behavior of the catalysts varied according to aging conditions and temperature of measurement. Pd/ceria-zirconia catalysts showed higher oxygen storage characteristics after 1050°C aging than Pd/ceria catalysts, and the phase purity of the ceria-zirconia was shown to positively affect the amount of oxygen storage. The initial rates of oxygen release from the model catalysts at 350°C were shown to depend on the preparation conditions of the supports. Sweep tests were carried out on Pd/ceria-zirconia, and showed that high oxygen storage and conversion efficiencies remain after redox aging at 1050°C.
Citation: Cuif, J., Deutsch, S., Marczi, M., Jen, H. et al., "High Temperature Stability of Ceria-Zirconia Supported Pd Model Catalysts," SAE Technical Paper 980668, 1998, https://doi.org/10.4271/980668. Download Citation
Author(s):
Jean-Pierre Cuif, Steve Deutsch, Mike Marczi, Hung-Wen Jen, George W. Graham, Woosang Chung, Robert W. McCabe
Affiliated:
Rhône-Poulenc (Rhodia), Ford Motor Company
Pages: 16
Event:
International Congress & Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Advanced Three-way Catalysts-PT-123, Catalysts: Emission Control and Lean Nox Technologies-SP-1353, SAE 1998 Transactions - Journal of Fuels and Lubricants-V107-4
Related Topics:
Catalysts
Storage
Oxygen
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