Novel promoting effects of tungsten on the selective catalytic reduction of NO by NH3 over MnO –CeO2 monolith catalyst

Abstract

Abstract A series of tungsten modified MnOx–CeO2 monolith catalysts were prepared and used for selective catalytic reduction (SCR) of NO by NH3 in the presence of O2. The experimental results showed that the SCR performance and SO2-resistant ability of MnOx–CeO2 were greatly enhanced by the introduction of tungsten. The catalyst containing 10% WO3 showed the highest NO conversion in a wide temperature range of 162–374 °C. The highly dispersed or amorphous tungsten oxide and the strong interaction between tungsten and MnOx–CeO2 should be the reasons for the excellent performance of the catalyst containing 10% WO3.