期刊
REACTION KINETICS AND CATALYSIS LETTERS
卷 91, 期 2, 页码 369-378出版社
AKADEMIAI KIADO
DOI: 10.1007/s11144-007-5154-9
关键词
pillared phlogophites; Al2O3; DeNOx; NH3; iron; copper
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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