FT-IR study of the catalytic oxidation of SO<sub>2</sub> during the process of selective catalytic reduction of NO with NH<sub>3</sub> over commercial catalysts

LIU Ya-ming; SHU Hang; XU Qi-sheng; ZHANG Yu-hua; YANG Lin-jun

Volume 43 Issue 08

Aug. 2015

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Article Navigation > Journal of Fuel Chemistry and Technology > 2015 > 43(08): 1018-1024

LIU Ya-ming, SHU Hang, XU Qi-sheng, ZHANG Yu-hua, YANG Lin-jun. FT-IR study of the catalytic oxidation of SO2 during the process of selective catalytic reduction of NO with NH3 over commercial catalysts[J]. Journal of Fuel Chemistry and Technology, 2015, 43(08): 1018-1024.

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LIU Ya-ming, SHU Hang, XU Qi-sheng, ZHANG Yu-hua, YANG Lin-jun. FT-IR study of the catalytic oxidation of SO₂ during the process of selective catalytic reduction of NO with NH₃ over commercial catalysts[J]. Journal of Fuel Chemistry and Technology, 2015, 43(08): 1018-1024.

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FT-IR study of the catalytic oxidation of SO₂ during the process of selective catalytic reduction of NO with NH₃ over commercial catalysts

1.
Electric Power Research Institute of Guangdong Power Grid Company, Guangzhou 510080, China;
2.
Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing 210096, China

Received Date: 2015-03-27
Rev Recd Date: 2015-05-21
Publish Date: 2015-08-30

Abstract

Abstract

This work briefly reveals the process of catalytic oxidation of SO₂ and the influences of NH₃, NO and O₂ on the oxidation behavior based on FT-IR.It suggests that the process of oxidation of SO₂: the absorption of SO₂ on V₂O₅ sites occupying its O atom in the form of SO^2-₃; reaction between absorbed SO₂ and O atom in V⁵⁺-OH to form an VOSO₄-like structure;reoxidation of V⁴⁺ to V⁵⁺ by O₂,promoting the transformation from VOSO₄-like intermediate to SO₃ and V₂O₅. NH₃ and NO competitively absorb with SO₂,suppressing its oxidation behavior. The removal of NOx and the oxidation of SO₂ is the relationship of mutual inhibition.
- FT-IR,
- selective catalytic reduction,
- V₂O₅-WO₃/TiO₂,
- De-NO_x,
- catalytic oxidation of SO₂

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References(29)

References

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