Abstract
A series of M–Cu (M = Mn, Ce, Cr, Co, and Fe) bimetal oxide catalysts combined with plasma were prepared for NOx removal at various temperatures. All catalysts combined with plasma exhibited excellent deNOx activity. The Mn–Cu catalyst showed the highest selective catalytic reduction (SCR) activity; the NO removal efficiency of the Mn–Cu catalyst could reach 90% at a gas temperature of 25 °C. E/N increased as gas temperature increased; the mean electron energy and the proportion of high-energy electrons also increased considerably, producing more active radicals. Without any catalyst, the increase in temperature inhibited NO removal owing to O3 consumption. As the temperature increased, NO removal efficiency decreased below 100 °C; however, it increased in the range of 100–300 °C, and then decreased above 300 °C in the plasma-catalyst system. NO2 concentration decreased markedly at 150 °C via the fast SCR reaction.
Published Version
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