The behavior of the manganese-cerium loaded metal-organic framework in elemental mercury and NO removal from flue gas

文献类型： 外文期刊

第一作者： Zhang, Xiao

作者： Zhang, Xiao;Shen, Boxiong;Zhang, Xiaoqi;Si, Meng;Yuan, Peng;Zhang, Xiao;Shen, Feng

作者机构：

关键词： Metal organic frameworks;Mn-Ce catalyst;Hg-0;NO;Flue gas

期刊名称：CHEMICAL ENGINEERING JOURNAL （ 影响因子：13.273； 五年影响因子：11.529 ）

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收录情况： SCI

摘要： Mn-Ce loaded metal-organic framework (MnCe@MOF) catalyst was obtained by incipient wetness impregnation of MOF with manganese-cerium nitrate. The obtained materials were investigated as potential catalysts for elemental mercury (Hg-0) and NO removal from simulate flue gas and the results indicated that MnCe@MOF exhibited superior activity in comparison with the conventional catalysts Mn-Ce loaded ZrO2, especially at low temperatures (<250 degrees C). It was established that the crystalline structure of MOF support influenced the catalytic behavior in a complex way. The MOF support played an important role in promoting dispersion of active components, improving the Hg-0 adsorption and enhancing oxygen utilization, which resulted in a desirable catalytic activity. To understand the mechanism of the Mn-Ce catalyst better, dynamic valence state evolution during the Hg-0 oxidation for the active components was investigated. The ratio of Mn3+/Mn4+ remained constant during the reaction at various temperatures, indicating the stability of Mn in the catalytic process. However, the ratio of Ce3+/Ce4+ gradually decreased with extended periods of reaction time, which most likely lead to the decreased of chemical adsorbed oxygen on the catalyst. (C) 2017 Published by Elsevier B.V.

分类号： TQ

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