Enhanced activity of ceria loaded Sb-V2O5/TiO 2 catalysts for NO reduction with ammonia

Kyung Ju Lee, Muhammad Salman Maqbool, Pullur Anil Kumar, Kwang Ho Song, Heon Phil Ha

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The effect of Ce-loading over Sb-V2O5/TiO2 catalysts was investigated for the removal of NOx by NH3. In order to understand the influence of Ce-loading over Sb-V2O 5/TiO2, NH3-temperature programmed desorption, H2-temperature programmed reduction, X-ray photoelectron spectroscopy (XPS) and diffused reflectance infrared fourier transformed spectroscopy (DRIFTS) were carried out. The 10 % Ce-loaded Sb-V2O 5/TiO2 catalyst exhibited superior activity than commercial V2O5-WO3-TiO2 under 6 % H2O and 800 ppm SO2. The XPS results indicated the presence of Ce3+ species. The amount of Brønsted acid sites significantly increased as a result of Ce-loading. The DRIFT spectrum of Sb-V2O5/TiO2 catalyst indicated a peak at 1,363 cm-1, which corresponded to intermediates of ammonia oxidation species at 350 C. Experimental results suggest that high NOx conversion and N2 selectivity of 10 % Ce-loaded Sb-V 2O5/TiO2 was attributed to enhanced acidity and reducibility.

Original languageEnglish
Pages (from-to)988-995
Number of pages8
JournalCatalysis Letters
Volume143
Issue number10
DOIs
Publication statusPublished - 2013 Oct 1

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Keywords

  • Ammonia
  • Ce-loading
  • DRIFTS
  • NO conversion
  • XPS

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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