High Temperature Stability of Ceria-Zirconia Supported Pd Model Catalysts Rhône-Poulenc (Rhodia)

Format:

Book

Conference/Event

Author/Creator:

Cuif, Jean-Pierre, author.

Conference Name:

International Congress & Exposition (1998-02-23 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 1998

Summary:

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

Notes:

Vendor supplied data

Publisher Number:

980668

Access Restriction:

Restricted for use by site license