Experimental study on mercury removal performance of magnetic activated carbon

YANG Chenglong; CAI Ming; LIU Tong; CHENG Guangwen; LI Yang; FU Kangli

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Experimental study on mercury removal performance of magnetic activated carbon

Thermal Power Generation Vol. 45, Issue 4, Pages: 54-59(2016)

更新时间：2025-09-28

- Experimental study on mercury removal performance of magnetic activated carbon
- 作者机构：
  
  1. 西安热工研究院有限公司电站锅炉煤清洁燃烧国家工程研究中心
  2. 华北电力大学能源动力与机械工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TQ424.1
- Published：2016
- 稿件说明：
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YANG Chenglong, CAI Ming, LIU Tong, et al. Experimental study on mercury removal performance of magnetic activated carbon[J]. Thermal Power Generation, 2016, 45(4): 54-59.
DOI：

YANG Chenglong, CAI Ming, LIU Tong, et al. Experimental study on mercury removal performance of magnetic activated carbon[J]. Thermal Power Generation, 2016, 45(4): 54-59. DOI：

摘要

为了制备同时具有优良脱汞性能和磁分离特性的磁性活性炭(MAC)

采用共沉淀法制备Fe~(3+)和Fe~(2+)的不同离子配比及不同磁质量分数的MAC

并对其进行比表面积、磁化强度、扫描电镜、X射线衍射、热失重试验等分析

得到Fe~(3+)和Fe~(2+)摩尔比为1∶1

磁质量分数为25%的MAC具备良好的磁分离特性和脱汞性能。在固定床试验台上对MAC进行脱汞性能影响试验

结果表明:γ-Fe_2O_3是MAC上主要的磁性物质

O_2和HCl的存在均能加强元素汞的氧化脱除

促进MAC对汞的吸附

且其含量越高脱汞性能越好;SO_2对MAC的脱汞效率无明显影响

接触初期在MAC表面产生竞争吸附现象

造成脱汞效率先降低后升高现象;水蒸气减弱了MAC对汞的吸附效果。

Abstract

To prepare a magnetic activated carbon with both good magnetic properties and high-efficiency

the co-precipitation method was applied to produce the activated carbon based MAC with different ion ratios and magnetic contents.Moreover

the MAC was characterized by BET surface areas measurements

vibrating sample magnetometer(VSM)

scanning electron microscope(SEM)

X-ray diffraction(XRD)and thermogravimetric analysis(TGA).It turns the MAC with mole ratio of Fe~(3+)to Fe~(2+)of 1∶1and the magnetic content of 25% had well magnetic division performance and mercury removal property.The effect of flue gas components on the MAC's mercury removal performance was experimentally studied on a benchscale fixed-bed test rig.The results show that

γ-Fe_2O_3 is the main magnetic materials on the MAC.The mercury adsorption capacity of the MAC gradually improved as the O_2 and HCl concentration increased.The SO_2 had no obvious effect on Hg0 removal.The presence of water vapor significantly inhibited the mercury adsorption.

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