化工学报 ›› 2015, Vol. 66 ›› Issue (4): 1324-1330.DOI: 10.11949/j.issn.0438-1157.20141672

• 催化、动力学与反应器 • 上一篇    下一篇

非均相类Fenton催化剂脱汞的实验与机理

周长松1, 孙路石1, 张安超2, 吴晓峰1, 马川1, 苏胜1, 胡松1, 向军1   

  1. 1. 华中科技大学煤燃烧国家重点实验室, 湖北 武汉 430074;
    2. 河南理工大学机械与动力工程学院, 河南 焦作 454000
  • 收稿日期:2014-11-12 修回日期:2015-01-13 出版日期:2015-04-05 发布日期:2015-04-05
  • 通讯作者: 孙路石
  • 作者简介:周长松(1990-),男,博士研究生。
  • 基金资助:

    国家自然科学基金项目(51376073, 51306046);煤燃烧国家重点实验室自主研发项目(FSKLCCB1503)。

Catalytic removal of Hg0 in flue gas by heterogeneous Fenton-like catalysts

ZHOU Changsong1, SUN Lushi1, ZHANG Anchao2, WU Xiaofeng1, MA Chuan1, SU Sheng1, HU Song1, XIANG Jun1   

  1. 1. State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China;
    2. School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo 454000, Henan, China
  • Received:2014-11-12 Revised:2015-01-13 Online:2015-04-05 Published:2015-04-05
  • Supported by:

    supported by the National Natural Science Foundation of China (51376073, 51306046) and the Independent Research and Development Project of SKLCC (FSKLCCB1503).

摘要:

采用共沉淀法分别制备Ti、Co、Cu掺杂Fe3O4的非均相类Fenton催化剂,在小型实验台架上进行非均相类Fenton反应脱汞的实验研究。利用X射线衍射(XRD)、扫描电子显微镜(SEM)对催化剂的晶体结构和形貌进行了表征。实验考察了掺杂前Fe3O4和掺杂后Fe2.59Ti0.41O4、Fe2.52Co0.48O4、Fe2.44Cu0.56O4催化剂的类Fenton脱汞性能,并通过电子顺磁共振技术(EPR)分析了非均相类Fenton脱汞的机理。结果表明:Ti、Cu掺杂后的催化剂具有较高的催化活性, 的强氧化作用是类Fenton脱汞的主要原因。

关键词: 汞, 催化剂, 类Fenton, 自由基, 吸收

Abstract:

A series of heterogeneous Fenton-like catalysts, un-doped and doped Fe3O4 with Ti, Co, and Cu was prepared by co-precipitation method and used for the removal of elemental mercury in flue gas. The evaluation experiments were carried out in a laboratory scale reactor. The crystal structure and morphology of these catalysts were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). The effect of H2O2 concentration and acid gases such as SO2 and NO on removal efficiency of mercury were systematically examined. The electron paramagnetic resonance (EPR) was employed to study the mechanism of mercury removal by heterogeneous Fenton-like catalytic reaction. The results showed that the catalysts doped with Ti and Cu show high activity for the removal of elemental mercury, and this high activity could be contributed to produce more radicals by these heterogeneous Fenton-like catalysts during Hg0 removal reactions.

Key words: mercury, catalyst, Fenton-like, radical, absorption

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