Highly Active Sb–V–CeO2/TiO2 Catalyst Under Low Sulfur for NH3-SCR at Low Temperature

Young Eun Jeong, Pullur Anil Kumar, Heon Phil Ha, Kwan Young Lee

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Abstract: The Cu based zeolite NH3-SCR catalysts are well-known for after treatment of exhaust gases from light-and heavy-duty diesel engines. However, these catalysts are easily deactivated under the co-presence of H2O and SO2. In the present study, Sb–V–CeO2/TiO2 catalyst showed superior conversion for the abatement of NOx with NH3 under H2O and SO2 condition compared to commercial Cu–SAPO-34 and CuFe–ZSM-5 zeolite catalysts. The physico-chemical properties of fresh and used catalysts were examined by BET surface area, TEM (Transition electron microscopy) with EDS/EDX (Energy dispersive spectrometer/X-ray), XPS (X-ray photoelectron spectroscopy), DRIFTS (in situ diffuse reflectance infrared Fourier transformed spectroscopy) and H2-TPR (temperature programmed reduction). Higher than 95% of initial NOx conversion was obtained over Sb–V–CeO2/TiO2 catalyst at 250 °C under 14% H2O and 50 ppm SO2 conditions. The SO2 on/off test of the CuFe–ZSM-5 and Cu–SAPO-34 catalysts indicated a drastic decrease of NOx conversion when SO2 was turned on. In contrast, Sb–V–CeO2/TiO2 catalyst maintained a high NOx conversion and initial NOx conversion was completely recovered when SO2 was turned off. Graphical Abstract: [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)428-441
Number of pages14
JournalCatalysis Letters
Volume147
Issue number2
DOIs
Publication statusPublished - 2017 Feb 1

Fingerprint

Thyristors
Sulfur
Catalysts
Zeolites
Temperature
Energy dispersive spectroscopy
X ray spectrometers
Exhaust gases
Chemical properties
Electron microscopy
Diesel engines
X ray photoelectron spectroscopy
Spectroscopy
Infrared radiation

Keywords

  • Acid sites
  • DRIFTS
  • NH-SCR
  • Sb–V–CeO/TiO
  • SO on/off test

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

Cite this

Highly Active Sb–V–CeO2/TiO2 Catalyst Under Low Sulfur for NH3-SCR at Low Temperature. / Jeong, Young Eun; Kumar, Pullur Anil; Ha, Heon Phil; Lee, Kwan Young.

In: Catalysis Letters, Vol. 147, No. 2, 01.02.2017, p. 428-441.

Research output: Contribution to journalArticle

Jeong, Young Eun ; Kumar, Pullur Anil ; Ha, Heon Phil ; Lee, Kwan Young. / Highly Active Sb–V–CeO2/TiO2 Catalyst Under Low Sulfur for NH3-SCR at Low Temperature. In: Catalysis Letters. 2017 ; Vol. 147, No. 2. pp. 428-441.
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N2 - Abstract: The Cu based zeolite NH3-SCR catalysts are well-known for after treatment of exhaust gases from light-and heavy-duty diesel engines. However, these catalysts are easily deactivated under the co-presence of H2O and SO2. In the present study, Sb–V–CeO2/TiO2 catalyst showed superior conversion for the abatement of NOx with NH3 under H2O and SO2 condition compared to commercial Cu–SAPO-34 and CuFe–ZSM-5 zeolite catalysts. The physico-chemical properties of fresh and used catalysts were examined by BET surface area, TEM (Transition electron microscopy) with EDS/EDX (Energy dispersive spectrometer/X-ray), XPS (X-ray photoelectron spectroscopy), DRIFTS (in situ diffuse reflectance infrared Fourier transformed spectroscopy) and H2-TPR (temperature programmed reduction). Higher than 95% of initial NOx conversion was obtained over Sb–V–CeO2/TiO2 catalyst at 250 °C under 14% H2O and 50 ppm SO2 conditions. The SO2 on/off test of the CuFe–ZSM-5 and Cu–SAPO-34 catalysts indicated a drastic decrease of NOx conversion when SO2 was turned on. In contrast, Sb–V–CeO2/TiO2 catalyst maintained a high NOx conversion and initial NOx conversion was completely recovered when SO2 was turned off. Graphical Abstract: [Figure not available: see fulltext.]

AB - Abstract: The Cu based zeolite NH3-SCR catalysts are well-known for after treatment of exhaust gases from light-and heavy-duty diesel engines. However, these catalysts are easily deactivated under the co-presence of H2O and SO2. In the present study, Sb–V–CeO2/TiO2 catalyst showed superior conversion for the abatement of NOx with NH3 under H2O and SO2 condition compared to commercial Cu–SAPO-34 and CuFe–ZSM-5 zeolite catalysts. The physico-chemical properties of fresh and used catalysts were examined by BET surface area, TEM (Transition electron microscopy) with EDS/EDX (Energy dispersive spectrometer/X-ray), XPS (X-ray photoelectron spectroscopy), DRIFTS (in situ diffuse reflectance infrared Fourier transformed spectroscopy) and H2-TPR (temperature programmed reduction). Higher than 95% of initial NOx conversion was obtained over Sb–V–CeO2/TiO2 catalyst at 250 °C under 14% H2O and 50 ppm SO2 conditions. The SO2 on/off test of the CuFe–ZSM-5 and Cu–SAPO-34 catalysts indicated a drastic decrease of NOx conversion when SO2 was turned on. In contrast, Sb–V–CeO2/TiO2 catalyst maintained a high NOx conversion and initial NOx conversion was completely recovered when SO2 was turned off. Graphical Abstract: [Figure not available: see fulltext.]

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