Propane combustion over supported Pt catalysts

Propane combustion over supported Pt catalysts We prepared Pt catalysts supported on various metal oxides, viz., ZrO2, CeO2, TiO2, yttria-stabilized zirconia (YSZ), SiO2, SiO2–Al2O3, and γ-Al2O3, using an incipient wetness method and applied them to propane combustion. In the cases of ZrO2-, CeO2-, and TiO2-supported Pt catalysts, supports with different surface areas were also used. The Pt dispersion in Pt catalysts supported on metal oxides increased with increasing surface area of the support for the same metal oxide. Pt catalysts on supports with lower surface areas (ZrO2, CeO2, and TiO2) showed higher catalytic activities for propane combustion than did Pt catalysts on supports with higher surface areas. The catalytic activity decreased in the following order: Pt/ZrO2 (2) > Pt/CeO2 (9) > Pt/TiO2 (1) = Pt/SiO2 (350) > Pt/ZrO2 (18) = Pt/YSZ > Pt/TiO2 (330) > Pt/SiO2–Al2O3 (350) > Pt/ZrO2 (73) > Pt/γ-Al2O3 (180) > Pt/CeO2 (160). The catalytic activity is inversely proportional to the amount of O2 chemisorbed up to the reaction temperature. It can be concluded that metallic Pt is essential for propane combustion and is maintained for the Pt catalysts with large Pt metal particles, which can be prepared by using a support with a low surface area. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Propane combustion over supported Pt catalysts

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Publisher
Springer Netherlands
Copyright
Copyright © 2011 by Springer Science+Business Media B.V.
Subject
Chemistry; Physical Chemistry; Inorganic Chemistry; Catalysis
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-011-0379-7
Publisher site
See Article on Publisher Site

Abstract

We prepared Pt catalysts supported on various metal oxides, viz., ZrO2, CeO2, TiO2, yttria-stabilized zirconia (YSZ), SiO2, SiO2–Al2O3, and γ-Al2O3, using an incipient wetness method and applied them to propane combustion. In the cases of ZrO2-, CeO2-, and TiO2-supported Pt catalysts, supports with different surface areas were also used. The Pt dispersion in Pt catalysts supported on metal oxides increased with increasing surface area of the support for the same metal oxide. Pt catalysts on supports with lower surface areas (ZrO2, CeO2, and TiO2) showed higher catalytic activities for propane combustion than did Pt catalysts on supports with higher surface areas. The catalytic activity decreased in the following order: Pt/ZrO2 (2) > Pt/CeO2 (9) > Pt/TiO2 (1) = Pt/SiO2 (350) > Pt/ZrO2 (18) = Pt/YSZ > Pt/TiO2 (330) > Pt/SiO2–Al2O3 (350) > Pt/ZrO2 (73) > Pt/γ-Al2O3 (180) > Pt/CeO2 (160). The catalytic activity is inversely proportional to the amount of O2 chemisorbed up to the reaction temperature. It can be concluded that metallic Pt is essential for propane combustion and is maintained for the Pt catalysts with large Pt metal particles, which can be prepared by using a support with a low surface area.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Sep 10, 2011

References

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