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

doi:10.1007/s11164-018-3378-0

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

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

Department of Chemical and Biological Engineering

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

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 NO_x conversion was compared with those of Mn/TiO₂ and Fe–Mn/TiO₂ catalysts to investigate the effect of the Sb. The NO_x 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 NO_x 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 language	English
Pages (from-to)	3737-3751
Number of pages	15
Journal	Research on Chemical Intermediates
Volume	44
Issue number	6
DOIs	https://doi.org/10.1007/s11164-018-3378-0
Publication status	Published - 2018 Jun 1

Keywords

Acidity
Mn-based catalysts
NO conversion
Redox properties
Sb influence

ASJC Scopus subject areas

Chemistry(all)

Access to Document

10.1007/s11164-018-3378-0

Cite this

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

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.",

keywords = "Acidity, Mn-based catalysts, NO conversion, Redox properties, Sb influence",

author = "Hyun Choi and Jeong, {Young Eun} and Kumar, {Pullur Anil} and Lee, {Kwan Young} and Ha, {Heon Phil}",

note = "Funding Information: Acknowledgement This work was financially supported by {\textquoteleft}Future Core Technology{\textquoteright} program from Korea Institute of Science and Technology (KIST). Publisher Copyright: {\textcopyright} 2018, Springer Science+Business Media B.V., part of Springer Nature.",

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AU - Jeong, Young Eun

AU - Kumar, Pullur Anil

AU - Lee, Kwan Young

AU - Ha, Heon Phil

N1 - Funding Information: Acknowledgement This work was financially supported by ‘Future Core Technology’ program from Korea Institute of Science and Technology (KIST). Publisher Copyright: © 2018, Springer Science+Business Media B.V., part of Springer Nature.

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Y1 - 2018/6/1

N2 - 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.

AB - 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.

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