催化学报

催化学报 ›› 2012, Vol. 33 ›› Issue (3): 576-580.DOI: 10.3724/SP.J.1088.2012.11012

• 研究论文 • 上一篇    

铁前驱体对 Fe/β 催化 NH3-SCR 反应性能的影响

张泽凯1, 俞河2, 廖冰冰1, 黄海凤2, 陈银飞1,*   

  1. 1浙江工业大学化学工程与材料学院催化反应工程研究所, 浙江杭州 310014; 2浙江工业大学生物与环境工程学院, 浙江杭州 310014
  • 收稿日期:2011-10-09 修回日期:2011-12-15 出版日期:2012-03-15 发布日期:2015-07-27

Influence of Iron Precursors on NH3-SCR Behavior of Fe/β Catalyst

ZHANG Zekai1, YU He2, LIAO Bingbing1, HUANG Haifeng2, CHEN Yinfei1,*   

  1. 1Institute of Chemical Reaction Engineering, College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, China; 2College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, China
  • Received:2011-10-09 Revised:2011-12-15 Online:2012-03-15 Published:2015-07-27

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摘要： 以硝酸铁、氯化铁和二茂铁等为前驱体, 采用液相浸渍法制备了 Fe/β催化剂, 并将其用于氨选择性催化还原脱硝反应. 并采用 X 射线衍射、透射电镜、N2 吸附-脱附、H2 程序升温还原以及 NH3 程序升温脱附等手段对催化剂进行了表征. 结果表明, 以二茂铁为前驱体制得的催化剂的活性明显优于其它两种前驱体. 在 60000 h-1 空速条件下, 150 oC 时 NOx 转化率即可达到 50%, 260 oC 可实现完全转化. 这是由于二茂铁的应用改善了铁活性物种在 β 分子筛上的分散度、颗粒尺寸和颗粒分布以及氧化还原性能.

关键词: &beta, 分子筛, 二茂铁, 前驱体, 氨, 选择性催化还原, 氮氧化物

Abstract: The precursor effects of Fe precursors on the selective catalytic reduction of NOx by NH3 (NH3-SCR) over Fe/β catalyst were evaluated. Three different precursors, ferrocene, ferric nitrate, and ferric chloride, were chosen to prepare Fe/β catalyst by liquid impregnation method. The catalyst samples were characterized by X-ray diffraction, N2 adsorption-desorption, transmission electron microscopy, H2 temperature-programmed reduction, and NH3 temperature-programmed desorption. The results showed that the activity of Fe/β from ferrocene was superior to the others. Under the reaction condition of GHSV 60000 h–1, 50% conversion of NOx was reached at 150 oC and full conversion was obtained at 260 oC. Characterization indicated that ferrocene is profitable to improve the particle size, particle distribution, and redox properties of FeOx species, leading to the NH3-SCR activity promotion.

Key words: &beta, zeolite, ferrocene, precursor, ammonia, selective catalytic reduction, nitric oxide