Effect of SO<sub>2</sub> on the reduction of NO by methane over iron catalyst

SU Ya-xin; SU A-long; REN Li-ming; DENG Wen-yi

Volume 42 Issue 03

Mar. 2014

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Article Navigation > Journal of Fuel Chemistry and Technology > 2014 > 42(03): 377-384

SU Ya-xin, SU A-long, REN Li-ming, DENG Wen-yi. Effect of SO2 on the reduction of NO by methane over iron catalyst[J]. Journal of Fuel Chemistry and Technology, 2014, 42(03): 377-384.

Citation:

SU Ya-xin, SU A-long, REN Li-ming, DENG Wen-yi. Effect of SO₂ on the reduction of NO by methane over iron catalyst[J]. Journal of Fuel Chemistry and Technology, 2014, 42(03): 377-384.

SU Ya-xin, SU A-long, REN Li-ming, DENG Wen-yi. Effect of SO2 on the reduction of NO by methane over iron catalyst[J]. Journal of Fuel Chemistry and Technology, 2014, 42(03): 377-384.

Citation:

SU Ya-xin, SU A-long, REN Li-ming, DENG Wen-yi. Effect of SO₂ on the reduction of NO by methane over iron catalyst[J]. Journal of Fuel Chemistry and Technology, 2014, 42(03): 377-384.

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Effect of SO₂ on the reduction of NO by methane over iron catalyst

School of Environmental Science and Engineering, Donghua University, Shanghai 201620, China

Received Date: 2013-08-06
Rev Recd Date: 2013-10-23
Publish Date: 2014-03-31

Abstract

Abstract

The effect of SO₂ on the reduction of NO by methane over iron and iron oxides was investigated at 300~1 100 ℃ in an electrically heated ceramic tubular flow reactor in simulated flue gas and N₂ atmosphere. The iron catalyst after reaction was characterized by X-ray diffraction (XRD) and the mechanism of NO reduction by methane over iron catalyst in the presence of SO₂ was elucidated. The results demonstrated that methane is effective to reduce NO over iron and iron oxides and SO₂ in the flue gas has little influence on the reduction of NO. In N₂ atmosphere with 0.01%~0.04% SO₂, metallic iron can simultaneously eliminate almost 100% of NO and SO₂ at a temperature above 700 ℃. In the simulated flue gas with 0.01%~0.04% SO₂, the efficiencies of NO reduction at 850 ℃ and 950 ℃ are higher than 95% and 98%, respectively; the influence of SO₂ on NO reduction is insignificant. More than 95% of NO is reduced by 1.13% methane over iron at 1 000 ℃ in a durable test over 100 h in the simulated flue gas atmosphere containing 0.02% SO₂.
- NO reduction,
- methane,
- iron,
- iron oxide,
- SO₂

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References(27)

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