Metal-organic framework loaded manganese oxides as efficient catalysts for low-temperature selective catalytic reduction of NO with NH3

Minhua Zhang; Baojuan Huang; Haoxi Jiang; Yifei Chen

doi:10.1007/s11705-017-1668-5

Front. Chem. Sci. Eng. ›› 2017, Vol. 11 ›› Issue (4) : 594 -602. DOI: 10.1007/s11705-017-1668-5

RESEARCH ARTICLE

Metal-organic framework loaded manganese oxides as efficient catalysts for low-temperature selective catalytic reduction of NO with NH₃

Minhua Zhang ¹^,²
, Baojuan Huang ¹^,²
, Haoxi Jiang ¹^,²
, Yifei Chen ¹^,²^,^†

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Abstract

A mild in-situdeposition method was used to fabricate Mn-based catalysts on a UiO-66 carrier for the selective catalytic reduction of NO by NH₃ (NH₃-SCR). The catalyst with 8.5 wt-% MnO_x loading had the highest catalytic activity for NH₃-SCR with a wide temperature window (100–290 °C) for 90% NO conversion. Characterization of the prepared MnO_x/UiO-66 catalysts showed that the catalysts had the crystal structure and porosity of the UiO-66 carrier and that the manganese particles were well-distributed on the surface of the catalyst. X-ray photoelectron spectroscopy analysis showed that there are strong interactions between the MnO_x and the Zr oxide secondary building units of the UiO-66 which has a positive effect on the catalytic activity. The 8.5 wt-% MnO_x catalyst maintained excellent activity during a 24-h stability test and exhibited good resistance to SO₂ poisoning.

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Keywords

metal-organic framework / selective catalytic reduction / manganese oxides / deNO_x / SO₂ resistance

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Minhua Zhang, Baojuan Huang, Haoxi Jiang, Yifei Chen. Metal-organic framework loaded manganese oxides as efficient catalysts for low-temperature selective catalytic reduction of NO with NH₃. Front. Chem. Sci. Eng., 2017, 11(4): 594-602 DOI:10.1007/s11705-017-1668-5