Sb-Containing Metal Oxide Catalysts for the Selective Catalytic Reduction of NO<i><sub>x</sub></i> with NH<sub>3</sub>
Sb-containing catalysts (SbZrO<i><sub>x</sub></i> (SbZr), SbCeO<i><sub>x</sub></i> (SbCe), SbCeZrO<i><sub>x</sub></i> (SbCeZr)) were prepared by citric acid method and investigated for the selective catalytic reduction (SCR) of...
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MDPI AG
2020-10-01
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| Series: | Catalysts |
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| Online Access: | https://www.mdpi.com/2073-4344/10/10/1154 |
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| author | Qian Xu Dandan Liu Chuchu Wang Wangcheng Zhan Yanglong Guo Yun Guo Li Wang Qingping Ke Minh Ngoc Ha |
| author_facet | Qian Xu Dandan Liu Chuchu Wang Wangcheng Zhan Yanglong Guo Yun Guo Li Wang Qingping Ke Minh Ngoc Ha |
| author_sort | Qian Xu |
| collection | DOAJ |
| description | Sb-containing catalysts (SbZrO<i><sub>x</sub></i> (SbZr), SbCeO<i><sub>x</sub></i> (SbCe), SbCeZrO<i><sub>x</sub></i> (SbCeZr)) were prepared by citric acid method and investigated for the selective catalytic reduction (SCR) of NO<i><sub>x</sub></i> with NH<sub>3</sub> (NH<sub>3</sub>-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 H<sub>2</sub>O and SO<sub>2</sub>. Various characterization methods, such as XRD, XPS, H<sub>2</sub>-TPR, NH<sub>3</sub>-TPD, and in situ diffuse reflectance infrared Fourier transform (DRIFT), were applied to understand their different behavior in NO<i><sub>x</sub></i> removal. The presence of Sb in the metal oxides led to the difference in acid distribution and redox property, which closely related with the NH<sub>3</sub> 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 NH<sub>3</sub>-SCR. The competition between NH<sub>3</sub> adsorption and NO oxidation was dependent on SbO<i><sub>x</sub></i> and metal oxides, which were found on SbCe while not on SbCeZr. |
| first_indexed | 2024-03-10T15:48:03Z |
| format | Article |
| id | doaj.art-ac9c543989c54a3fa7528e9036e1c74d |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-10T15:48:03Z |
| publishDate | 2020-10-01 |
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| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-ac9c543989c54a3fa7528e9036e1c74d2023-11-20T16:20:12ZengMDPI AGCatalysts2073-43442020-10-011010115410.3390/catal10101154Sb-Containing Metal Oxide Catalysts for the Selective Catalytic Reduction of NO<i><sub>x</sub></i> with NH<sub>3</sub>Qian Xu0Dandan Liu1Chuchu Wang2Wangcheng Zhan3Yanglong Guo4Yun Guo5Li Wang6Qingping Ke7Minh Ngoc Ha8Key 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, ChinaKey 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, ChinaKey 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, ChinaKey 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, ChinaKey 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, ChinaKey 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, ChinaKey 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, ChinaCollege of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243002, ChinaVNU Key Laboratory of Advanced Material for Green Growth, VNU University of Science, Vietnam National University, Hanoi 100000, VietnamSb-containing catalysts (SbZrO<i><sub>x</sub></i> (SbZr), SbCeO<i><sub>x</sub></i> (SbCe), SbCeZrO<i><sub>x</sub></i> (SbCeZr)) were prepared by citric acid method and investigated for the selective catalytic reduction (SCR) of NO<i><sub>x</sub></i> with NH<sub>3</sub> (NH<sub>3</sub>-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 H<sub>2</sub>O and SO<sub>2</sub>. Various characterization methods, such as XRD, XPS, H<sub>2</sub>-TPR, NH<sub>3</sub>-TPD, and in situ diffuse reflectance infrared Fourier transform (DRIFT), were applied to understand their different behavior in NO<i><sub>x</sub></i> removal. The presence of Sb in the metal oxides led to the difference in acid distribution and redox property, which closely related with the NH<sub>3</sub> 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 NH<sub>3</sub>-SCR. The competition between NH<sub>3</sub> adsorption and NO oxidation was dependent on SbO<i><sub>x</sub></i> and metal oxides, which were found on SbCe while not on SbCeZr.https://www.mdpi.com/2073-4344/10/10/1154SbCeZrNH<sub>3</sub>-SCRactive sitesmechanism |
| spellingShingle | Qian Xu Dandan Liu Chuchu Wang Wangcheng Zhan Yanglong Guo Yun Guo Li Wang Qingping Ke Minh Ngoc Ha Sb-Containing Metal Oxide Catalysts for the Selective Catalytic Reduction of NO<i><sub>x</sub></i> with NH<sub>3</sub> Catalysts SbCeZr NH<sub>3</sub>-SCR active sites mechanism |
| title | Sb-Containing Metal Oxide Catalysts for the Selective Catalytic Reduction of NO<i><sub>x</sub></i> with NH<sub>3</sub> |
| title_full | Sb-Containing Metal Oxide Catalysts for the Selective Catalytic Reduction of NO<i><sub>x</sub></i> with NH<sub>3</sub> |
| title_fullStr | Sb-Containing Metal Oxide Catalysts for the Selective Catalytic Reduction of NO<i><sub>x</sub></i> with NH<sub>3</sub> |
| title_full_unstemmed | Sb-Containing Metal Oxide Catalysts for the Selective Catalytic Reduction of NO<i><sub>x</sub></i> with NH<sub>3</sub> |
| title_short | Sb-Containing Metal Oxide Catalysts for the Selective Catalytic Reduction of NO<i><sub>x</sub></i> with NH<sub>3</sub> |
| title_sort | sb containing metal oxide catalysts for the selective catalytic reduction of no i sub x sub i with nh sub 3 sub |
| topic | SbCeZr NH<sub>3</sub>-SCR active sites mechanism |
| url | https://www.mdpi.com/2073-4344/10/10/1154 |
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