Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 44, Issue 1, Pages 67-78Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0926-3373(03)00020-1
Keywords
nitrogen monoxide; selective reduction; decane; silver alumina catalyst; rhodium additive; SO2; infrared study
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The addition of small amounts of rhodium enhanced the activity of Ag/Al2O3 catalyst for the selective reduction of NO with decane at low temperatures. The Rh-promoted Ag/Al2O3 showed its high performance even in the presence of low concentrations Of SO2. Based on the catalytic activity for elementary reactions, it was suggested that the role of added rhodium is to enhance the reaction between NOx and decane-derived species, leading to NO reduction. Catalyst characterization by UV-Vis spectroscopy indicated that the major silver species on Rh-promoted Ag/Al2O3 is Ag-n(delta+) clusters, which would be responsible for the high activity. FT-IR measurements revealed that the formation rate of isocyanate species, which is a major reaction intermediate, is higher on Rh-promoted Ag/Al2O3. (C) 2003 Elsevier Science B.V. All rights reserved.
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