Abstract
A series of magnetic iron-magnesium mixed oxide catalysts (Fe1−x Mg x O z ) were synthesized via a novel coprecipitation method with microwave thermal treatment, and their activity in NH3-SCR was tested on a quartz fixedbed reactor. Physical and chemical properties of the catalysts were characterized by X-ray diffraction (XRD), N2-adsorption-desorption, scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS). Fe0.8Mg0.2O z with excellent N2 selectivity and resistance to SO2 and H2O was validated as the proper SCR catalyst, with the maximum NO x conversion of 99.1% fulfilled at 325 °C. Activity was strongly influenced by the γ-Fe2O3 crystalline phase, and magnesium existed in an amorphous phase and interacted with iron oxide intensively to form solid solution in favor of SCR. For Fe0.8Mg0.2O z catalyst, optimum pore diameter distribution, appropriate surface area, pore volume and abundant lattice oxygen on the surface could be guaranteed, which is good for the diffusion process and enhances the activity.
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The paper will be reported in the 11th China-Korea Clean Energy Workshop.
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Xu, L., Niu, S., Lu, C. et al. NH3-SCR performance and characterization over magnetic iron-magnesium mixed oxide catalysts. Korean J. Chem. Eng. 34, 1576–1583 (2017). https://doi.org/10.1007/s11814-017-0044-y
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DOI: https://doi.org/10.1007/s11814-017-0044-y