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Influence of BaO on Pd/Al2O3-based catalysts in C2H4 and CO oxidation as well as in NO reduction |
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| Authors: | Tanja Kolli Katariina Rahkamaa-Tolonen Ulla Lassi Auli Savimki Riitta L Keiski |
| Affiliation: | aDepartment of Process and Environmental Engineering, University of Oulu, P.O. Box 4300, FIN-90014 Oulu, Finland bECOCAT Oy, Catalyst Research, Typpitie 1, FIN-90650 Oulu, Finland cCentral Ostrobothnia Polytechnic, Department of Technology, FIN-67100 Kokkola, Finland |
| Abstract: | In this study, Pd/Al2O3 and Pd/BaO/Al2O3 metallic monoliths were used to investigate the effect of BaO in C2H4 and CO oxidation as well as in NO reduction. A FT-IR gas analyser was used to study the activity of the catalysts. Several activity experiments carried out with dissimilar feedstreams revealed that BaO enhances CO and C2H4 oxidation as well as NO reduction reactions in rich conditions. This effect is due to BaO, which causes a decrease in the ethene poisoning of palladium. In lean conditions BaO is present in the form of Ba(OH)2 which reacts with oxidised NO releasing water. Therefore, NO was stored during the lean reaction. |
| Keywords: | Barium oxide (BaO) Carbon monoxide Ethene Nitrogen oxides Palladium |
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