Iron-Tungsten Mixed Oxide Catalyst for the Selective Catalytic Reduction of NO with NH<sub>3</sub>

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Abstract

Iron-Tungsten mixed oxide catalyst was prepared by the co-precipitation method and used for the selective catalytic reduction of NO with NH₃.The effects of molar ratios of Fe/W, space velocity, SO₂ and H₂O on the NO conversion were investigated. The characterization means of SEM, XRD, BET and NH₃-TPD were also applied to analyze the physicochemical properties of the catalyst. Among all the iron-tungsten mixed oxides, the catalyst with the Fe/W molar ratio of 4:1 exhibited the best catalytic activity with above 90% NO conversion in the temperature range from 300 ℃ to 400 ℃ under the space velocity of 75 000 h^-1. The Fe₄WO_x catalyst also showed high tolerance to SO₂ and H₂O in the test condition. The characterization result showed that the strong interaction between Fe and W, the large specific surface, and the strong acidity were the main reasons for the iron-tungsten mixed oxide catalyst to acquire the high catalytic activity.

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	Articles by authors
	Rong Xuejia
	Li Yonghong
	Li Xiaoliang

Keywords： iron-tungsten mixed oxide catalyst； selective catalytic reduction； denitration

Received 2014-05-06;

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Rong Xuejia, Li Yonghong, Li Xiaoliang.Iron-Tungsten Mixed Oxide Catalyst for the Selective Catalytic Reduction of NO with NH₃[J] Chemcial Industry and Engineering, 2015,V32(4): 19-23,62

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