Sb-Containing Metal Oxide Catalysts for the Selective Catalytic Reduction of NOx with NH3

Qian Xu; Dandan Liu; Chuchu Wang; Wangcheng Zhan; Yanglong Guo; Yun Guo; Li Wang; Qingping Ke; Minh Ngoc Ha

doi:10.3390/catal10101154

Catalysts (Oct 2020)

Sb-Containing Metal Oxide Catalysts for the Selective Catalytic Reduction of NOx with NH3

Qian Xu,
Dandan Liu,
Chuchu Wang,
Wangcheng Zhan,
Yanglong Guo,
Yun Guo,
Li Wang,
Qingping Ke,
Minh Ngoc Ha

Affiliations

Qian Xu: Key Laboratory for Advanced Materials and Research Institute of Industrial Catalysis, School of Chemistry & Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
Dandan Liu: Key Laboratory for Advanced Materials and Research Institute of Industrial Catalysis, School of Chemistry & Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
Chuchu Wang: Key Laboratory for Advanced Materials and Research Institute of Industrial Catalysis, School of Chemistry & Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
Wangcheng Zhan: Key Laboratory for Advanced Materials and Research Institute of Industrial Catalysis, School of Chemistry & Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
Yanglong Guo: Key Laboratory for Advanced Materials and Research Institute of Industrial Catalysis, School of Chemistry & Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
Yun Guo: Key Laboratory for Advanced Materials and Research Institute of Industrial Catalysis, School of Chemistry & Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
Li Wang: Key Laboratory for Advanced Materials and Research Institute of Industrial Catalysis, School of Chemistry & Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
Qingping Ke: College of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243002, China
Minh Ngoc Ha: VNU Key Laboratory of Advanced Material for Green Growth, VNU University of Science, Vietnam National University, Hanoi 100000, Vietnam

DOI: https://doi.org/10.3390/catal10101154
Journal volume & issue: Vol. 10, no. 10
p. 1154

Abstract

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Sb-containing catalysts (SbZrOx (SbZr), SbCeOx (SbCe), SbCeZrOx (SbCeZr)) were prepared by citric acid method and investigated for the selective catalytic reduction (SCR) of NOx with NH3 (NH3-SCR). SbCeZr outperformed SbZr and SbCe and exhibited the highest activity with 80% NO conversion in the temperature window of 202–422 °C. Meanwhile, it also had good thermal stability and resistance against H2O and SO2. Various characterization methods, such as XRD, XPS, H2-TPR, NH3-TPD, and in situ diffuse reflectance infrared Fourier transform (DRIFT), were applied to understand their different behavior in NOx removal. The presence of Sb in the metal oxides led to the difference in acid distribution and redox property, which closely related with the NH3 adsorption and NO oxidation. Brønsted acid and Lewis acid were evenly distributed on SbCe, while Brønsted acid dominated on SbCeZr. Compared with Brønsted acid, Lewis acid was slightly active in NH3-SCR. The competition between NH3 adsorption and NO oxidation was dependent on SbOx and metal oxides, which were found on SbCe while not on SbCeZr.

Published in Catalysts

ISSN: 2073-4344 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Chemical technology; Science: Chemistry
Website: https://www.mdpi.com/journal/catalysts

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