Ce-Mn mixed oxides supported on glass-fiber for low-temperature selective catalytic reduction of NO with NH3
来源期刊：Journal of Rare Earths2014年第5期
论文作者：李乐 刁永发 刘鑫
文章页码：409 - 415
摘 要：Samples of cerium-manganese oxides supported on modified glass-fiber with different Ce/Mn molar ratios（Ce-Mn/GF） were prepared by an impregnation method and tested for low-temperature（80–180 oC） selective catalytic reduction（SCR） of NO with ammonia. This brand-new technology could remove NO and particles matter from coal-fired flue gas. The surface properties of the catalysts were examined by means of Brunauer-Emmett-Teller（BET）, X-ray photoelectron spectroscopy（XPS）, X-ray diffraction（XRD）, and scanning electron microscopy（SEM）. The experimental results showed that the catalyst with a Ce/Mn molar ratio of 0.2 obtained high activity of 87.4% NO conversion at 150 oC under a high space velocity of 50000 h–1. Deactivation poisoned by SO2 still occurred, but the Ce-Mn/GF（0.2） catalyst performed desirable tolerance to SO2 with decreasing 50% in 40 min and then maintaining at about 30% NO conversion. Characterization results indicated that the excellent low-temperature catalytic activity was related to the high specific surface area, pore structure, and amorphous phase.
李乐，刁永发，刘鑫
School of Environment Science and Engineering, Donghua University
摘 要：Samples of cerium-manganese oxides supported on modified glass-fiber with different Ce/Mn molar ratios（Ce-Mn/GF） were prepared by an impregnation method and tested for low-temperature（80–180 oC） selective catalytic reduction（SCR） of NO with ammonia. This brand-new technology could remove NO and particles matter from coal-fired flue gas. The surface properties of the catalysts were examined by means of Brunauer-Emmett-Teller（BET）, X-ray photoelectron spectroscopy（XPS）, X-ray diffraction（XRD）, and scanning electron microscopy（SEM）. The experimental results showed that the catalyst with a Ce/Mn molar ratio of 0.2 obtained high activity of 87.4% NO conversion at 150 oC under a high space velocity of 50000 h–1. Deactivation poisoned by SO2 still occurred, but the Ce-Mn/GF（0.2） catalyst performed desirable tolerance to SO2 with decreasing 50% in 40 min and then maintaining at about 30% NO conversion. Characterization results indicated that the excellent low-temperature catalytic activity was related to the high specific surface area, pore structure, and amorphous phase.
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