Hg0 removal from flue gas by ionic liquid/H2O2

Guangwen Cheng; Bofeng Bai; Qiang Zhang; Ming Cai

doi:10.1016/j.jhazmat.2014.09.007

Hg⁰ removal from flue gas by ionic liquid/H₂O₂

Guangwen Cheng
, Bofeng Bai
, Qiang Zhang
, Ming Cai

School of Energy and Power Engineering

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

1-Alkyl-3-methylimidazolium chloride ionic liquids ([C_nmim] Cl, n=4, 6, 8) were prepared. The ionic liquid was then mixed with hydrogen peroxide (H₂O₂) to form an absorbent. The Hg⁰ removal performance of the absorbent was investigated in a gas/liquid scrubber using simulated flue gas. It was found that the ionic liquid/H₂O₂ mixture was an excellent absorbent and could be used to remove Hg⁰ from flue gas. When the mass ratio of H₂O₂ to ionic liquid was 0.5, the absorbent showed high Hg⁰ removal efficiency (up to 98%). The Hg⁰ removal efficiency usually increased with the absorption temperature, while decreased with the increase of alkyl chain length in ionic liquid molecule. The Hg⁰ removal mechanism involved with Hg⁰ oxidation by H₂O₂ and Hg²⁺ transfer from aqueous phase to ionic liquid phase.

Original language	English
Pages (from-to)	767-773
Number of pages	7
Journal	Journal of Hazardous Materials
Volume	280
DOIs	https://doi.org/10.1016/j.jhazmat.2014.09.007
State	Published - 15 Sep 2014

Keywords

Absorbent
Elemental mercury
Flue gas
Ionic liquid
Oxidation

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10.1016/j.jhazmat.2014.09.007

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title = "Hg0 removal from flue gas by ionic liquid/H2O2",

abstract = "1-Alkyl-3-methylimidazolium chloride ionic liquids ([Cnmim] Cl, n=4, 6, 8) were prepared. The ionic liquid was then mixed with hydrogen peroxide (H2O2) to form an absorbent. The Hg0 removal performance of the absorbent was investigated in a gas/liquid scrubber using simulated flue gas. It was found that the ionic liquid/H2O2 mixture was an excellent absorbent and could be used to remove Hg0 from flue gas. When the mass ratio of H2O2 to ionic liquid was 0.5, the absorbent showed high Hg0 removal efficiency (up to 98\%). The Hg0 removal efficiency usually increased with the absorption temperature, while decreased with the increase of alkyl chain length in ionic liquid molecule. The Hg0 removal mechanism involved with Hg0 oxidation by H2O2 and Hg2+ transfer from aqueous phase to ionic liquid phase.",

keywords = "Absorbent, Elemental mercury, Flue gas, Ionic liquid, Oxidation",

author = "Guangwen Cheng and Bofeng Bai and Qiang Zhang and Ming Cai",

note = "Publisher Copyright: {\textcopyright} 2014 Elsevier B.V.",

year = "2014",

month = sep,

day = "15",

doi = "10.1016/j.jhazmat.2014.09.007",

language = "英语",

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pages = "767--773",

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TY - JOUR

T1 - Hg0 removal from flue gas by ionic liquid/H2O2

AU - Cheng, Guangwen

AU - Bai, Bofeng

AU - Zhang, Qiang

AU - Cai, Ming

PY - 2014/9/15

Y1 - 2014/9/15

N2 - 1-Alkyl-3-methylimidazolium chloride ionic liquids ([Cnmim] Cl, n=4, 6, 8) were prepared. The ionic liquid was then mixed with hydrogen peroxide (H2O2) to form an absorbent. The Hg0 removal performance of the absorbent was investigated in a gas/liquid scrubber using simulated flue gas. It was found that the ionic liquid/H2O2 mixture was an excellent absorbent and could be used to remove Hg0 from flue gas. When the mass ratio of H2O2 to ionic liquid was 0.5, the absorbent showed high Hg0 removal efficiency (up to 98%). The Hg0 removal efficiency usually increased with the absorption temperature, while decreased with the increase of alkyl chain length in ionic liquid molecule. The Hg0 removal mechanism involved with Hg0 oxidation by H2O2 and Hg2+ transfer from aqueous phase to ionic liquid phase.

AB - 1-Alkyl-3-methylimidazolium chloride ionic liquids ([Cnmim] Cl, n=4, 6, 8) were prepared. The ionic liquid was then mixed with hydrogen peroxide (H2O2) to form an absorbent. The Hg0 removal performance of the absorbent was investigated in a gas/liquid scrubber using simulated flue gas. It was found that the ionic liquid/H2O2 mixture was an excellent absorbent and could be used to remove Hg0 from flue gas. When the mass ratio of H2O2 to ionic liquid was 0.5, the absorbent showed high Hg0 removal efficiency (up to 98%). The Hg0 removal efficiency usually increased with the absorption temperature, while decreased with the increase of alkyl chain length in ionic liquid molecule. The Hg0 removal mechanism involved with Hg0 oxidation by H2O2 and Hg2+ transfer from aqueous phase to ionic liquid phase.

KW - Absorbent

KW - Elemental mercury

KW - Flue gas

KW - Ionic liquid

KW - Oxidation

UR - https://www.scopus.com/pages/publications/84908044343

U2 - 10.1016/j.jhazmat.2014.09.007

DO - 10.1016/j.jhazmat.2014.09.007

M3 - 文章

C2 - 25240646

AN - SCOPUS:84908044343

SN - 0304-3894

VL - 280

SP - 767

EP - 773

JO - Journal of Hazardous Materials

JF - Journal of Hazardous Materials

ER -

Hg⁰ removal from flue gas by ionic liquid/H₂O₂

Abstract

Keywords

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