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 journalArticlepeer-review

9 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/TiO2catalyst showed superior conversion for the abatement of NOxwith NH3under H2O and SO2condition 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 NOxconversion was obtained over Sb–V–CeO2/TiO2catalyst at 250 °C under 14% H2O and 50 ppm SO2conditions. The SO2on/off test of the CuFe–ZSM-5 and Cu–SAPO-34 catalysts indicated a drastic decrease of NOxconversion when SO2was turned on. In contrast, Sb–V–CeO2/TiO2catalyst maintained a high NOxconversion and initial NOxconversion was completely recovered when SO2was 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

Keywords

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

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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