Superior activity of iron–manganese supported on kaolin for NO abatement at low temperature |
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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.
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收稿时间: | 2019/5/2 0:00:00 |
Superior activity of iron-manganese supported on kaolin for NO abatement at low temperature |
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Authors: | Xiaobo Wang Jie Zhou Tong Zhao Keting Gui Jia Wang Hywel R Thomas |
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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 |
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Abstract: | |
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Keywords: | Kaolin Low-temperature Iron-based catalysts NO abatement |
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