The role of doped Fe on the activity of alumina-supported Pt and Pd diesel exhaust catalysts

The role of doped Fe on the activity of alumina-supported Pt and Pd diesel exhaust catalysts Supported Pt and Pd are most commonly used for oxidation catalysts. They have similar and different characteristics for deactivation factors. The catalytic activity of Pt and Pd catalysts supported on γ-Al2O3 was studied in the presence and absence of H2O and SO2 during CO oxidation under simulated conditions of diesel exhaust gas. Without the addition of H2O and SO2 to the feed gas, Pd/Al2O3 had a superior catalytic activity compared to Pt/Al2O3. The addition of H2O to the feed gas strongly and negligibly affected the activity of Pd and Pt, respectively, while the addition of SO2 to the feed gas had a strong poisoning effect on the catalytic activity of both Pt and Pd catalysts. Although being the most active, Pd catalysts exhibited a strong sensitivity to water and sulfur-containing compounds. Fe was added to the Pt and Pd catalysts to introduce sulfur resistance. The addition of Fe enhanced the activity of the catalysts by suppressing the phase transition of Al2O3 to Al2(SO4)3 and by hindering metal sintering. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

The role of doped Fe on the activity of alumina-supported Pt and Pd diesel exhaust catalysts

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Publisher
Springer Netherlands
Copyright
Copyright © 2011 by Springer Science+Business Media B.V.
Subject
Chemistry; Catalysis; Inorganic Chemistry; Physical Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-011-0431-7
Publisher site
See Article on Publisher Site

Abstract

Supported Pt and Pd are most commonly used for oxidation catalysts. They have similar and different characteristics for deactivation factors. The catalytic activity of Pt and Pd catalysts supported on γ-Al2O3 was studied in the presence and absence of H2O and SO2 during CO oxidation under simulated conditions of diesel exhaust gas. Without the addition of H2O and SO2 to the feed gas, Pd/Al2O3 had a superior catalytic activity compared to Pt/Al2O3. The addition of H2O to the feed gas strongly and negligibly affected the activity of Pd and Pt, respectively, while the addition of SO2 to the feed gas had a strong poisoning effect on the catalytic activity of both Pt and Pd catalysts. Although being the most active, Pd catalysts exhibited a strong sensitivity to water and sulfur-containing compounds. Fe was added to the Pt and Pd catalysts to introduce sulfur resistance. The addition of Fe enhanced the activity of the catalysts by suppressing the phase transition of Al2O3 to Al2(SO4)3 and by hindering metal sintering.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Nov 18, 2011

References

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