Sammanfattning
Single and bi-metallic silver modified ZSM-5 catalysts were synthesized using different methods of preparation, characterized by several techniques and tested in simulated diesel conditions. Additionally the catalytic behaviour of the most active catalyst, containing 5 wt.% Ag and prepared by impregnation (5Ag(Imp)-H-ZSM-5), was studied over a broad temperature range with two reducing agents (octane and propene). To correlate the catalytic activity of the prepared catalysts with preparation parameters the materials were characterized by XRD, SEM, N2-physisorption, octane/propene-TPD, EPR and ICP techniques. A dual bed system consisting of Ag/alumina and the most active zeolitic material (5Ag(Imp)-H-ZSM-5) was shown not only to substantially enhance the activity of Ag/alumina in the low temperature region, but also to completely oxidize the CO and unburned hydrocarbons.
Originalspråk | Engelska |
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Sidor (från-till) | 138-145 |
Antal sidor | 8 |
Tidskrift | Applied Catalysis B: Environmental |
Volym | 70 |
Nummer | 1-4 |
DOI | |
Status | Publicerad - 31 jan. 2007 |
MoE-publikationstyp | A1 Tidskriftsartikel-refererad |