Abstract
The low-temperature selective catalytic reduction of NO over an active carbon-supported catalyst was studied in order to develop catalysts that are active at temperatures around 150 °C as part of a low-temperature process for NO control in flue gases from coal-fired power plants. Reductants studied include acetone, isopropanol, isobutanol, ethyl ether, ethanol, propene, and methanol. Acetone is the most active reductant for the selective reduction of NO over the 5%Cu-2%Ag/C catalyst tested. At 150 °C, 35% NO conversion was obtained in the presence of 4% O2 and 8% H2O at 3,000 h-1 space velocity after 5 h on stream. There is some decrease in NO and hydrocarbon conversion with time on stream. It is believed that the oxidation of acetone minimizes the oxidation of carbon in the presence of O2 and promotes the selective reduction of NO.
Published Version
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