Selective catalytic reduction of NO with NH<sub>3</sub> over Mn-based catalysts at low temperature

ZHANG Xiao-peng; SHEN Bo-xiong

Volume 41 Issue 01

Jan. 2013

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ZHANG Xiao-peng, SHEN Bo-xiong. Selective catalytic reduction of NO with NH3 over Mn-based catalysts at low temperature[J]. Journal of Fuel Chemistry and Technology, 2013, 41(01): 123-128.

Citation:

ZHANG Xiao-peng, SHEN Bo-xiong. Selective catalytic reduction of NO with NH₃ over Mn-based catalysts at low temperature[J]. Journal of Fuel Chemistry and Technology, 2013, 41(01): 123-128.

ZHANG Xiao-peng, SHEN Bo-xiong. Selective catalytic reduction of NO with NH3 over Mn-based catalysts at low temperature[J]. Journal of Fuel Chemistry and Technology, 2013, 41(01): 123-128.

Citation:

ZHANG Xiao-peng, SHEN Bo-xiong. Selective catalytic reduction of NO with NH₃ over Mn-based catalysts at low temperature[J]. Journal of Fuel Chemistry and Technology, 2013, 41(01): 123-128.

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Selective catalytic reduction of NO with NH₃ over Mn-based catalysts at low temperature

College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China

Received Date: 2012-06-29
Rev Recd Date: 2012-09-20
Publish Date: 2013-01-31

Abstract

Abstract

Three Mn-based catalysts of Mn/Ce-ZrO₂, Mn/P₂₅, and Mn/Al₂O₃ with different supports were prepared by impregnation method and were used in the selective catalytic reduction of NO with NH₃ (NH₃-SCR) at low temperature. The catalysts were characterized by XRD, NH₃-TPD and H₂-TPR and their activity at low temperature as well as the resistances towards H₂O and SO₂ were investigated. The results showed that Mn/Ce-ZrO₂ exhibits better activity at low temperature (100~160℃) than other two catalysts, while Mn/P₂₅ performs better at high temperature (160~220℃), which is related with the redox characteristics of the catalysts. Mn/Ce-ZrO₂ is more easily to be reduced at low temperature while Mn/P₂₅ has a larger reduction peak at higher temperature, as revealed by H₂-TPR. All of the three catalysts have a good resistance to H₂O; among them Mn/Ce-ZrO₂ exhibits the best resistance to SO₂ and H₂O, which should be attributed to the abundant acid sites and the instability of ammonia sulfate formed on the surface of Mn/Ce-ZrO₂.
- low-temperature selective catalytic reduction,
- manganese oxide,
- SO₂,
- NO

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References(27)

References

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