Abstract
Nitric oxide was effectively reduced by ethanol over an alumina-supported silver catalyst in the presence of excess oxygen and water vapor. In this reduction, though NO was mainly converted to N 2, there was also a substantial amount of nitrogen-containing by-products such as N 2O, NH 3, CH 3CN, HCN. There was also a very small amount of by-products — HNCO and NH 4OCN (and/or urea, an isomer). The effects of silver content of the catalysts, water vapor, space velocity, and ethanol concentration on the reduction of NO were studied. The mechanism for the formation of nitrogen-containing compounds was also examined on the basis of the reactions of model compounds and the analyses of the products.
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