DRIFT Study on Cr2O3-SO42-/TiO2 Catalyst for Low Temperature Selective Catalytic Reduction of NO with NH3

doi:10.1007/s40242-014-3446-y

Chemical Research in Chinese Universities ›› 2014, Vol. 30 ›› Issue (2): 279-283.doi: 10.1007/s40242-014-3446-y

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DRIFT Study on Cr₂O₃-SO₄^2-/TiO₂ Catalyst for Low Temperature Selective Catalytic Reduction of NO with NH₃

ZHANG Yiming¹, ZHANG He^1,2, ZHOU Liang¹, HAN Wei¹

1. College of Physics, Jilin University, Changchun 130012, P. R. China;
2. National Key Lab of High Power Semiconductor Lasers, Changchun University of Science and Technology, Changchun 130022, P. R. China

Received:2013-10-21 Revised:2013-12-06 Online:2014-04-01 Published:2013-12-30
Contact: ZHANG He, HAN Wei E-mail:whan@jlu.edu.cn;zhhe920@sina.com
Supported by:
Supported by the Scientific and Technological Planning Project of Jilin Province, China(No.20106006) and the Graduate Innovation Found Project of Jilin University, China(No.20121057).

Abstract

Abstract:

Chromium oxides supported on TiO₂ showed good activity for the selective catalytic reduction of NO by NH₃. The catalytic activity of Cr₂O₃-SO₄^2-/TiO₂ catalyst was greatly enhanced by the addition of SO₄^2- into TiO₂ support. The catalyst surface properties were characterized with NH₃-TPD(temperature programmed desorption) and H₂-TPR(temperature programmed reduction). The sulphate on the catalyst surface could enhance the acidity and redox of the catalyst obviously. The reaction mechanism on this catalyst was researched in detail by in situ diffuse reflectance Fourier transform infrared(FTIR) spectroscope. Eley-Rideal and Langmuir-Hinshelwood mechanism existed simultaneously for selective catalytic reduction(SCR) reaction of NO over Cr₂O₃-SO₄^2-/TiO₂ catalyst.

Key words: Nitric oxide, Selective catalytic reduction, Sulfate

ZHANG Yiming, ZHANG He, ZHOU Liang, HAN Wei. DRIFT Study on Cr₂O₃-SO₄^2-/TiO₂ Catalyst for Low Temperature Selective Catalytic Reduction of NO with NH₃[J]. Chemical Research in Chinese Universities, 2014, 30(2): 279-283.

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DRIFT Study on Cr₂O₃-SO₄^2-/TiO₂ Catalyst for Low Temperature Selective Catalytic Reduction of NO with NH₃

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