| Getting insights into gas-phase sulfation effect on catalytic performance of praseodymium oxides in NH3-SCR of NO |
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| 作者姓名： | Yandi Cai Peng Yang Qinglong Liu Kaili Ma Wenxin Ma Wang Song Qiuhui Qian Fei Gao Wei Tan Lin Dong |
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| 作者单位： | 1. State Key Laboratory of Pollution Control and Resource Reuse,School of Environment,Jiangsu Key Laboratory of Vehicle Emissions Control,Center of Modern Analysis,Key Laboratory of Mesoscopic Chemistry of MOE,School of Chemistry and Chemical Engineering,Nanjing University;2. Analysis and Testing Center,Southeast University;3. National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology,School of Environmental Science and Engineering,Suzhou University of Science and Technology |
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| 基金项目： | Project supported by the National Natural Science Foundation of China (21972063)；;the Natural Science Foundation of Jiangsu Province(BK20200012)； |
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| 摘 要： | Sulfation treatment has been widely used to promote the catalytic performance of ceria(CeO2) based catalysts for the selective catalytic reduction of NO by NH3(NH3-SCR of NO).Praseodymium oxide(PrOx),another commonly used rare earth material with similar structural properties as CeO2,also shows satistactory redox properties due to the facile redox cycle of Pr3+■Pr4+.In this work,gas phase sulfation treatment with varied...
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| 收稿时间： | 29 September 2022 |
Getting insights into gas-phase sulfation effect on catalytic performance of praseodymium oxides in NH3-SCR of NO |
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| Yandi Cai,Peng Yang,Qinglong Liu,Kaili Ma,Wenxin Ma,Wang Song,Qiuhui Qian,Fei Gao,Wei Tan,Lin Dong.Getting insights into gas-phase sulfation effect on catalytic performance of praseodymium oxides in NH3-SCR of NO[J].Journal of Rare Earths,2023,41(6):952-958. |
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| Affiliation: | 1. State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Jiangsu Key Laboratory of Vehicle Emissions Control, Center of Modern Analysis, Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China;2. Analysis and Testing Center, Southeast University, Nanjing 211189, China;3. National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China |
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| Abstract: | Sulfation treatment has been widely used to promote the catalytic performance of ceria (CeO2) based catalysts for the selective catalytic reduction of NO by NH3 (NH3-SCR of NO). Praseodymium oxide (PrOx), another commonly used rare earth material with similar structural properties as CeO2, also shows satisfactory redox properties due to the facile redox cycle of Pr3+ ? Pr4+. In this work, gas phase sulfation treatment with varied duration was performed on PrOx at 200 °C, and the NH3-SCR activity of sulfated PrOx was evaluated. Based on the results of systematic characterizations (e.g., N2-physisorption, NH3 oxidation, NO oxidation, in situ diffuse Fourier transform infrared spectroscopy), it is revealed that the catalytic performance of sulfated PrOx is highly dependent on the sulfation time (or the amount of sulfate species deposited on PrOx), which has a significant impact on the competitive reaction between NH3 oxidation and NH3-SCR of NO, thus determining the NH3-SCR activity of PrOx. This work provides new insight into tuning the interaction between PrOx surface and reactants (NO, NH3) via sulfation treatment, which cam guide the design and application of PrOx based catalysts for NH3-SCR of NO in the future. |
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| Keywords: | Praseodymium oxides Sulfation treatment Surface acidity Rare earths |
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