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Superior activity of iron–manganese supported on kaolin for NO abatement at low temperature
摘    要:A series of Fe–Mn catalysts was prepared using different supports(kaolin, diatomite, and alumina) and used for NO abatement via low-temperature NH_3-selective catalytic reduction(SCR).The results showed that 12 Fe–10 Mn/Kaolin(with the concentration of Fe and Mn 12 and 10 wt.%, respectively) exhibited the highest activity, and more than 95.8% NO conversion could be obtained within the wide temperature range of 120–300℃.The properties of the catalysts were characterized by inductively coupled plasma-atomic emission spectrometry(ICP-AES), thermogravimetry(TG), Brunner–Emmet–Teller(BET)measurements, X-ray diffraction(XRD), H_2-temperature programmed reduction(H_2-TPR),NH_3-temperature programmed desorption(NH_3-TPD), X-ray photoelectron spectroscopy(XPS), scanning electron microprobe(SEM) and energy dispersive spectroscopy(EDS)techniques.The support effects resulted in significant differences in the components and structures of catalysts.The 12 Fe–10 Mn/Kaolin catalyst exhibited better dispersion of active species, optimum low-temperature reduction behavior, the largest amount of normalized Br?nsted acid sites, and the highest Mn~(4+)/Mn and Fe~(3+)/(Fe~(3+)+ Fe~(2+)), all of which may be major reasons for its superior catalytic activity.

收稿时间:2019/5/2 0:00:00

Superior activity of iron-manganese supported on kaolin for NO abatement at low temperature
Authors:Xiaobo Wang  Jie Zhou  Tong Zhao  Keting Gui  Jia Wang  Hywel R Thomas
Institution:School of Environmental Science, Nanjing Xiaozhuang University, Nanjing 211171, China;Geoenvironmental Research Centre, School of Engineering, Cardiff University, Cardiff CF24 3AA, UK;School of Environmental Science, Nanjing Xiaozhuang University, Nanjing 211171, China;School of Energy and Environment, Southeast University, Nanjing 210096, China;College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China;Geoenvironmental Research Centre, School of Engineering, Cardiff University, Cardiff CF24 3AA, UK
Abstract:
Keywords:Kaolin  Low-temperature  Iron-based catalysts  NO abatement
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