Research progress on carbon-based low-temperature NH3-SCR catalysts for smelting flue gas denitrification
At present,the NH3-SCR catalyst used in smelting flue gas treatment and denitrification has short-comings such as narrow operating temperature window,low catalytic activity at low temperature(120 ℃),and easy poisoning,which limits its wide application.Therefore,the development of catalysts with low temperature efficiency,good anti-toxicity performance and strong stability has become the focus of current research.Carbon-based catalysts have attracted much attention due to their wide range of sources,strong adsorption perform-ance,and good catalytic activity,and have broad prospects in denitrification.Based on the latest research pro-gress of carbon-based low-temperature NH3-SCR catalysts,the factors influencing the denitrification activity of catalysts were introduced from the aspects of carbon-based catalyst materials,addition of active components,acid or base modification,resistance to SO2 and H2O poisoning,and the NH3-SCR reaction mechanism of car-bon-based catalysts is analyzed,and the direction of carbon-based catalysts with excellent denitrification per-formance and anti-poisoning performance of low-temperature NH3-SCR is proposed.
denitrificationlow temperaturecarbon-basedsmelting flue gas
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