Sb modified Fe–Mn/TiO2 catalyst for the reduction of NOx with NH3 at low temperatures

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

Research output: Contribution to journalArticle

Abstract

Manganese-based catalysts have attracted much attention due to their excellent performance for NO reduction with NH3 (NH3-SCR) at low temperatures. In the current study, the novel metal Sb was modified into Mn/TiO2 and Fe–Mn/TiO2, and the NOx conversion was compared with those of Mn/TiO2 and Fe–Mn/TiO2 catalysts to investigate the effect of the Sb. The NOx reduction activities of the catalysts were evaluated in the temperature range of 100–250 °C at a space velocity of 60,000 h−1. The physicochemical properties of all the catalysts were characterized by Brunauer–Emmett–Teller surface area, temperature-programmed desorption of ammonia, temperature-programmed reduction, X-ray photoelectron spectroscopy, X-ray diffraction, and high-resolution transmission electron microscopy. Interestingly, the Sb-promoted Mn-based catalysts showed significantly higher NOx conversion than the other catalysts with or without 6 vol% of H2O. The high performance of the Sb-modified catalysts could be related to the increase of acid sites and redox properties.

Original languageEnglish
Pages (from-to)1-15
Number of pages15
JournalResearch on Chemical Intermediates
DOIs
Publication statusAccepted/In press - 2018 Mar 15

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Keywords

  • Acidity
  • Mn-based catalysts
  • NO conversion
  • Redox properties
  • Sb influence

ASJC Scopus subject areas

  • Chemistry(all)

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