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Huang B, Fang H, Huang H, Lu M, Yu C. A one-pot synthesis of Cu-modified Mn-rich MnSAPO-34 catalyst with excellent low temperature NH3-selective catalytic reduction performance and H2O resistance. J IND ENG CHEM 2021. [DOI: 10.1016/j.jiec.2020.12.029] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Ji S, Li Z, Song K, Li H, Li Y, Yang J, Li M, Yang C. Fabrication of a wide temperature Mn–Ce/TNU-9 catalyst with superior NH 3-SCR activity and strong SO 2 and H 2O tolerance. NEW J CHEM 2021. [DOI: 10.1039/d0nj05404f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A Mn–Ce/TNU-9 catalyst demonstrated excellent sulfur and water resistance and good catalytic stability in the NH3-SCR reaction.
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Affiliation(s)
- Shuai Ji
- School of Chemistry and Chemical Engineering
- Qiqihar University
- Qiqihar
- China
| | - Zhifang Li
- School of Materials Science and Engineering
- Qiqihar University
- Qiqihar
- China
- State Key Laboratory of Polymer Matrix Composites
| | - Kun Song
- School of Chemistry and Chemical Engineering
- Qiqihar University
- Qiqihar
- China
| | - Hairui Li
- School of Chemistry and Chemical Engineering
- Qiqihar University
- Qiqihar
- China
| | - Yueyu Li
- School of Materials Science and Engineering
- Qiqihar University
- Qiqihar
- China
| | - Jian Yang
- School of Materials Science and Engineering
- Qiqihar University
- Qiqihar
- China
| | - Mingjie Li
- School of Materials Science and Engineering
- Qiqihar University
- Qiqihar
- China
| | - Chonglong Yang
- School of Chemistry and Chemical Engineering
- Qiqihar University
- Qiqihar
- China
- School of Materials Science and Engineering
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DeNOx of Nano-Catalyst of Selective Catalytic Reduction Using Active Carbon Loading MnOx-Cu at Low Temperature. Catalysts 2020. [DOI: 10.3390/catal10010135] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
With the improvement of environmental protection standards, selective catalytic reduction (SCR) has become the mainstream technology of flue gas deNOx. Especially, the low-temperature SCR nano-catalyst has attracted more and more attention at home and abroad because of its potential performance and economy in industrial applications. In this paper, low-temperature SCR catalysts were prepared using the activated carbon loading MnOx-Cu. Then, the catalysts were packed into the fiedbed stainless steel micro-reactor to evaluate the selective catalytic reduction of NO performance. The influence of reaction conditions was investigated on the catalytic reaction, including the MnOx-Cu loading amount, calcination and reaction temperature, etc. The experimental results indicate that SCR catalysts show the highest catalytic activity for NO conversion when the calcination temperature is 350 °C, MnOx loading amount is 5%, Cu loading amount is 3%, and reaction temperature is 200 °C. Under such conditions, the NO conversion arrives at 96.82% and the selectivity to N2 is almost 99%. It is of great significance to investigate the influence of reaction conditions in order to provide references for industrial application.
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Yan Z, Qu Y, Liu L, Ge X, Yang J, Wei L, Yang T, Wang X. Promotional effect of rare earth-doped manganese oxides supported on activated semi-coke for selective catalytic reduction of NO with NH 3. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:24473-24484. [PMID: 28895018 DOI: 10.1007/s11356-017-0084-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Accepted: 09/03/2017] [Indexed: 06/07/2023]
Abstract
A composite catalyst for the selective catalytic reduction (SCR) of NOx with NH3 is investigated, in which the rare earth (RE, including La, Ce, Pr, and Nd) is doped into manganese oxides supported on activated semi-coke (MnOx/ASC) via hydrothermal method at the molar ratio of Mn:RE = 1:5. It is evidenced that the addition of RE at a rather low molar ratio can enhance the catalytic activity of MnOx/ASC. The catalyst with a Mn:Ce molar ratio of 10:1 yields an over 90% NOx removal efficiency in the temperature range of 150-250 °C. An approximate 100% NO conversion and 95% N2 selectivity are achieved at about 200 °C. The catalysts are characterized by N2 physisorption, X-ray powder diffraction (XRD), scanning electron microscope (SEM), hydrogen temperature-programmed reduction (H2-TPR) and X-ray photoelectron spectroscopy (XPS). The results indicated that the Ce additive is conducive to the NOx adsorption and then accelerates the SCR reaction due to the formation of more chemisorbed oxygen (Oβ), which is favored during the oxidation of NH3 and NO. Moreover, the in situ diffused reflectance infrared Fourier transform spectroscopy (DRIFTS) results confirm that the Ce additive on MnOx/ASC catalyst could provide more active Brønsted acid sites, which eventually contributes to the SCR reaction. The generation of ad-NH4+ and nitrite species is proved to play the crucial role in the promotional effect of RE addition.
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Affiliation(s)
- Zheng Yan
- Liaoning Key Laboratory of Clean Energy and Institute of Clean Energy and Environmental Engineering, College of Energy and Environment, Shenyang Aerospace University, 110034, Liaoning, People's Republic of China.
| | - Yanxin Qu
- Liaoning Key Laboratory of Clean Energy and Institute of Clean Energy and Environmental Engineering, College of Energy and Environment, Shenyang Aerospace University, 110034, Liaoning, People's Republic of China
| | - Lili Liu
- Beijing Key Laboratory for Solid Waste Utilization and Management, College of Engineering, Peking University, Beijing, 100871, People's Republic of China
| | - Xinlei Ge
- Jiangsu Engineering & Technology Research Center of Environmental Cleaning Materials (ECM), School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, 210044, Jiangsu, People's Republic of China
| | - Jiayao Yang
- Liaoning Key Laboratory of Clean Energy and Institute of Clean Energy and Environmental Engineering, College of Energy and Environment, Shenyang Aerospace University, 110034, Liaoning, People's Republic of China
| | - Lihong Wei
- Liaoning Key Laboratory of Clean Energy and Institute of Clean Energy and Environmental Engineering, College of Energy and Environment, Shenyang Aerospace University, 110034, Liaoning, People's Republic of China
| | - Tianhua Yang
- Liaoning Key Laboratory of Clean Energy and Institute of Clean Energy and Environmental Engineering, College of Energy and Environment, Shenyang Aerospace University, 110034, Liaoning, People's Republic of China
| | - Xidong Wang
- Beijing Key Laboratory for Solid Waste Utilization and Management, College of Engineering, Peking University, Beijing, 100871, People's Republic of China.
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