Role of ceria in the improvement of SO2 resistance of LaxCe1 ? xFeO3 catalysts for catalytic reduction of NO with CO |
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| Affiliation: | 1. Key Laboratory of Industrial Ecology and Environmental Engineering, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China;2. Gold Catalysis Research Center, State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China;3. Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Hönggerberg, HCI, CH-8093 Zurich, Switzerland;1. Beijing Key Laboratory of Green Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing 100084, PR China;2. State Key Laboratory of Multiphase Complex System, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China;1. National Engineering Lab for Coal-fired Pollutants Emission Reduction, Shandong University, Jinan 250061, China;2. Provincial Key Lab of Energy Carbon Reduction and Resource Utilization, Shandong University, Jinan 250061, China;1. National Engineering Lab for Coal-fired Pollutants Emission Reduction, Shandong Provincial Key Lab of Energy Carbon Reduction and Resource Utilization, Shandong University, Jinan, 250061, China;2. School of Power Engineering, Harbin Institute of Technology, Harbin, 150001, China |
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| Abstract: | Perovskite-type catalysts with LaFeO3 and substituted LaxCe1 ? xFeO3 compositions were prepared by sol–gel method. These catalysts were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), CO temperature-programmed reduction (CO-TPR), and SO2 temperature-programmed desorption (SO2-TPD). Catalytic reaction for NO reduction with CO in the presence of SO2 has been investigated in this study. LaFeO3 exhibited an excellent catalytic activity without SO2, but decreased sharply when SO2 gas was added to the CO + NO reaction system. In order to inhibit the effect of SO2, substitution of Ce in the structure of LaFeO3 perovskite has been investigated. It was found that La0.6Ce0.4FeO3 showed the maximum SO2 resistance among a series of LaxCe1 ? xFeO3 composite oxides. |
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