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

doi:10.11949/j.issn.0438-1157.20141672

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

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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. 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).

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. 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

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)。

Abstract

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 Hg⁰removal reactions.

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

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Fe_2.59Ti_0.41O₄、Fe_2.52Co_0.48O₄、Fe_2.44Cu_0.56O₄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

CLC Number:

TQ534.9

ZHOU Changsong, SUN Lushi, ZHANG Anchao, WU Xiaofeng, MA Chuan, SU Sheng, HU Song, XIANG Jun. Catalytic removal of Hg⁰ in flue gas by heterogeneous Fenton-like catalysts[J]. CIESC Journal, 2015, 66(4): 1324-1330.

周长松, 孙路石, 张安超, 吴晓峰, 马川, 苏胜, 胡松, 向军. 非均相类Fenton催化剂脱汞的实验与机理[J]. 化工学报, 2015, 66(4): 1324-1330.

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

非均相类Fenton催化剂脱汞的实验与机理

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