Removal of Hg<sup>0</sup> from simulated flue gas by MnO<italic style="font-style: italic"><sub>x</sub></italic> modified activated carbon

LI Xiangyang; LI Yang; JIN Lijun; YANG He; WANG Dechao; HU Haoquan

doi:10.11949/0438-1157.20190323

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Removal of Hg⁰ from simulated flue gas by MnO_x modified activated carbon

更新时间：2026-07-24

- Removal of Hg⁰ from simulated flue gas by MnO_x modified activated carbon
- CIESC Journal Vol. 70, Issue 8, Pages: 3078-3085(2019)
- 作者机构：
  
  大连理工大学化工学院，精细化工国家重点实验室，煤化工研究设计所，辽宁大连 116024
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20190323
  CLC： X 511
- Received：01 April 2019，
  
  Revised：2019-05-23，
  
  Online First：24 July 2026，
  
  Published：05 August 2019
- 稿件说明：
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李向阳, 李扬, 靳立军, 杨赫, 王德超, 胡浩权. MnO_x改性活性炭用于模拟烟气中Hg⁰的脱除[J]. 化工学报, 2019, 70(8): 3078-3085 DOI: 10.11949/0438-1157.20190323.

LI Xiangyang, LI Yang, JIN Lijun, YANG He, WANG Dechao, HU Haoquan. Removal of Hg⁰ from simulated flue gas by MnO_x modified activated carbon[J]. CIESC Journal, 2019, 70(8): 3078-3085 DOI: 10.11949/0438-1157.20190323.
李向阳, 李扬, 靳立军, 杨赫, 王德超, 胡浩权. MnO_x改性活性炭用于模拟烟气中Hg⁰的脱除[J]. 化工学报, 2019, 70(8): 3078-3085 DOI: 10.11949/0438-1157.20190323. DOI：

LI Xiangyang, LI Yang, JIN Lijun, YANG He, WANG Dechao, HU Haoquan. Removal of Hg⁰ from simulated flue gas by MnO_x modified activated carbon[J]. CIESC Journal, 2019, 70(8): 3078-3085 DOI: 10.11949/0438-1157.20190323. DOI：

摘要

采用浸渍法制备了MnO

改性活性炭（MnO

/AC），用于模拟煤燃烧烟气中的元素态汞的脱除。实验研究了吸附剂的Mn负载量、吸附温度和烟气组分对所制备的改性活性炭的脱汞性能的影响，以及SO

对活性炭脱汞的抑制作用机理。研究结果表明，当模拟烟气中含有5%（体积）O

，Mn负载量为14%（质量），吸附温度为150℃时，改性活性炭的平均脱汞效率为97.0%（3 h）。模拟烟气中少量的O

和微量的HCl、NO均对汞的脱除起促进作用，而微量的SO

则对汞的脱除有抑制作用。通过吸附后的MnO

改性活性炭的TG/DTG、XPS和Hg-TPD分析，推测SO

对改性活性炭脱汞的抑制作用是由于其消耗MnO

中的晶格氧，形成的硫酸盐占据了14Mn/AC表面上的活性位点所致。模拟烟气中微量的NO可以有效降低SO

对脱汞的抑制作用。

Abstract

The MnO

dified activated carbon (MnO

/AC) was prepared by impregnation method to simulate the removal of elemental mercury in coal combustion flue gas. The effects of Mn loading on sorbent

sorption temperature and flue gas composition on removal performance of elemental mercury in simulated flue gas were investigated. Mechanism of SO

inhibition on mercury removal was revealed. The average Hg

removal efficiency on MnO

/AC is 97.0% at 150℃ in 3 hours when Mn loading is 14% (mass) with 5% (vol) O

in simulated flue gas. A small amount of O

and trace amounts of HCl and NO promoted the removal of mercury in gas phase

while trace amount of SO

inhibited it. TG/DTG

XPS and Hg-TPD analyses of spent MnO

modified activated carbon indicated that the inhibition of SO

on Hg

removal of modified activated carbon is due to the consumption of lattice oxygen in MnO

by formation of sulfate that occupies active sites on the surface of 14Mn/AC. This inhibition of SO

on removal of elemental mercury could be effectively reduced by adding trace amount of NO.

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references

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⁰

Removal of Hg0 from simulated flue gas by MnOx modified activated carbon

DOI：10.11949/0438-1157.20190323

摘要

Abstract

关键词

Keywords

references

Removal of Hg⁰ from simulated flue gas by MnO_x modified activated carbon