Phlogophites intercalated with Al2O3 pillars and modified with transition metals as catalysts of the DeNOx process |
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Authors: | Lucjan Chmielarz Piotr Kustrowski Marek Michalik Barbara Dudek Magdalena Czajka and Roman Dziembaj |
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Institution: | (1) Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Kraków, Poland;(2) Institute of Geological Sciences, Jagiellonian University, Oleandry 2a, 30-063 Kraków, Poland |
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Abstract: | Natural phlogophite, pre-treated with acids and intercalated with alumina pillars, was used as catalytic support. Transition
metals (Fe, Cu) were deposited on the surface of the modified clay materials by an ion-exchange method. The obtained samples
were characterized with respect to structure (XRD), texture (BET), composition (EPMA) and chemical nature of the deposited
transition metals species (UV-vis-DRS). The phlogophite based materials have been found to be active and selective catalysts
of the DeNOx process. The Fe-containing samples were catalytically active at lower temperatures than the clays modified with
copper. A competitive ammonia oxidation by oxygen decreased the effectiveness of the DeNOx process in the high temperature
range. |
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Keywords: | Pillared phlogophites Al2O3 DeNOx NH3 iron copper |
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