| Effect of different doping elements on performance of Ce-Mn/TiO2 catalyst for low temperature denitration |
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| 作者姓名： | Lihua Huang Jian Hua |
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| 作者单位： | 1. Insititute of Environment and Resources,Southwest University of Science and Technology;2. National Engineering Research Center for Flue Gas Desulfurization |
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| 摘 要： | Sm and Ho were doped in Ce-Mn/TiO2 catalyst respectively to enhance its denitration performance at low temperature.X-ray diffraction(XRD),N2 adsorption-desorption,X-ray photoelectron spectroscopy(XPS),NH3-temperature programmed desorption(NH3-TPD),H2-temperature programmed reduction(H2-TPR) and in situ diffuse reflectance infrared Fourier transform spectroscopy(DRIFTS) techniques were used to analyze the structure and performance ...
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| 收稿时间： | 21 January 2022 |
Effect of different doping elements on performance of Ce–Mn/TiO2 catalyst for low temperature denitration |
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| Lihua Huang,Jian Hua.Effect of different doping elements on performance of Ce-Mn/TiO2 catalyst for low temperature denitration[J].Journal of Rare Earths,2023,41(5):689-697. |
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| Affiliation: | 1. Insititute of Environment and Resources, Southwest University of Science and Technology, Mianyang 621010, China;2. National Engineering Research Center for Flue Gas Desulfurization, Chengdu 610065, China;1. National Engineering Research Center for Rare Earth, GRINM Group Co., Ltd., Beijing 100088, China;2. GRIREM Advanced Materials Co., Ltd., Beijing 100088, China;3. General Research Institute for Nonferrous Metals, Beijing 100088, China;1. CAS Key Laboratory of Magnetic Materials and Devices, Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China;2. College of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China;3. Baotou Hidyree Technology Co., Ltd., Baotou 014030, China;4. Hangzhou Permanent Magnet Group Co., Ltd., Hangzhou 311231, China;5. Ningbo Permanent Magnetics Co., Ltd., Ningbo 315201, China;6. Fujian Key Laboratory for Rare Earth Functional Materials, Longyan 366300, China;1. School of Materials and Engineering, Shanghai University, Shanghai 200444, China;2. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China;3. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China;4. School of Environment and Chemical Engineering, Shanghai University of Electric Power, Shanghai 201306, China;1. Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;4. Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China |
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| Abstract: | Sm and Ho were doped in Ce–Mn/TiO2 catalyst respectively to enhance its denitration performance at low temperature. X-ray diffraction (XRD), N2 adsorption–desorption, X-ray photoelectron spectroscopy (XPS), NH3-temperature programmed desorption (NH3-TPD), H2-temperature programmed reduction (H2-TPR) and in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) techniques were used to analyze the structure and performance of catalysts. The results demonstrate that Ho doping increases the amount of acid sites and improves low temperature redox property of Ce–Mn/TiO2, which lead to excellent DeNOx performance of Ho-Ce-Mn/TiO2 in the whole reaction temperature range. Sm doping results in decline of redox property, but it is beneficial to increasing the acid sites of Ce–Mn/TiO2. The increased surface acid sites and moderate oxidative ability impart Sm-Ce-Mn/TiO2 higher denitration activity and N2 selectivity at temperature above 150 °C. Lewis acid sites and redox property are the main factors affecting the activity of catalysts. Doping of Ho and Sm both improves sulfur resistance performance of Ce–Mn/TiO2 by inhibiting the adsorption of SO2 and formation of sulfate. Ce–Mn/TiO2 modified by Ho shows better sulfur resistance than that doped with Sm because of its more surface acid sites. |
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| Keywords: | Doping Sm Ho Denitration performance Rare earths |
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