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Phosphorus poisoning of ZSM-5 and Pt/ZSM-5 zeolite catalysts in diesel exhaust gas conditions |
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| Authors: | Kröger V. Kanerva T. Lassi U. Rahkamaa-Tolonen K. Lepistö T. Keiski R. L. |
| Affiliation: | (1) Department of Process and Environmental Engineering, University of Oulu, P.O.Box 4300, FIN-90014 University of Oulu, Finland;(2) Institute of Materials Science, Tampere University of Technology, P.O.Box 589, FIN-33101 Tampere, Finland;(3) Department of Technology, Central Ostrobothnia University of Applied Sciences, Talonpojankatu 2, FIN-67100 Kokkola, Finland;(4) Ecocat Oy, Typpitie 1, FIN-90650 Oulu, Finland |
| Abstract: | Powdered ZSM-5 and Pt/ZSM-5 catalysts were studied as fresh and after two treatments: hydrothermal ageing and phosphorus poisoning in hydrothermal conditions. The results showed that the deactivating effect of phosphorus was stronger than the effect of the hydrothermal treatment alone. Phosphorus had accumulated in the samples during the ageing. The decrease in specific surface area and increase in Pt particle size indicated the possible reasons for deactivation. |
| Keywords: | ZSM-5 zeolite platinum diesel phosphorus poisoning |
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