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Investigation on elemental mercury oxidation mechanism by non-thermal plasma treatment

Wang, Z. H.; Jiang, S. D.; Zhu, Y. Q.; Zhou, J. S.; Zhou, J. H.; Li, Zhongshan LU and Cen, K. F. (2010) In Fuel Processing Technology 91(11). p.1395-1400
Abstract
Converting elemental mercury into divalent compound is one of the most important steps for mercury abatement from coal fired flue gas. The oxidation of elemental mercury was investigated in this paper using dielectric barrier discharge (DBD) non-thermal plasma (NTP) technology at room temperature. Effects of different flue gas components like oxygen, moisture, HCl, NO and SO2 were investigated. Results indicate that active radicals including O, O-3 and OH all contribute to the oxidation of elemental mercury. Under the conditions of 5% O-2 in the simulated flue gas, about 90.2% of Hg-0 was observed to be oxidized at 3.68 kV discharge voltage. The increase of discharge voltage, O-2 level and H2O content can all improve the oxidation rate,... (More)
Converting elemental mercury into divalent compound is one of the most important steps for mercury abatement from coal fired flue gas. The oxidation of elemental mercury was investigated in this paper using dielectric barrier discharge (DBD) non-thermal plasma (NTP) technology at room temperature. Effects of different flue gas components like oxygen, moisture, HCl, NO and SO2 were investigated. Results indicate that active radicals including O, O-3 and OH all contribute to the oxidation of elemental mercury. Under the conditions of 5% O-2 in the simulated flue gas, about 90.2% of Hg-0 was observed to be oxidized at 3.68 kV discharge voltage. The increase of discharge voltage, O-2 level and H2O content can all improve the oxidation rate, individually. With O-2 and H2O both existed, there is an optimal moisture level for the mercury oxidation during the NTP treatment. In this test, the observed optimal moisture level was around 0.74% by volume. Hydrogen chloride can promote the oxidation of mercury due to chlorine atoms produced in the plasma process. Both NO and SO2 have inhibitory effects on mercury oxidation, which can be attributed to their competitive consumption of O-3 and O. (c) 2010 Elsevier By. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
DBD, Plasma, Mercury, Oxidation, Nip
in
Fuel Processing Technology
volume
91
issue
11
pages
1395 - 1400
publisher
Elsevier
external identifiers
  • wos:000282550900006
  • scopus:77956394273
ISSN
0378-3820
DOI
10.1016/j.fuproc.2010.05.012
language
English
LU publication?
yes
id
cc6e6345-6249-4154-bbe1-22d507f890ad (old id 1727239)
date added to LUP
2010-11-26 14:04:17
date last changed
2018-05-29 12:18:29
@article{cc6e6345-6249-4154-bbe1-22d507f890ad,
  abstract     = {Converting elemental mercury into divalent compound is one of the most important steps for mercury abatement from coal fired flue gas. The oxidation of elemental mercury was investigated in this paper using dielectric barrier discharge (DBD) non-thermal plasma (NTP) technology at room temperature. Effects of different flue gas components like oxygen, moisture, HCl, NO and SO2 were investigated. Results indicate that active radicals including O, O-3 and OH all contribute to the oxidation of elemental mercury. Under the conditions of 5% O-2 in the simulated flue gas, about 90.2% of Hg-0 was observed to be oxidized at 3.68 kV discharge voltage. The increase of discharge voltage, O-2 level and H2O content can all improve the oxidation rate, individually. With O-2 and H2O both existed, there is an optimal moisture level for the mercury oxidation during the NTP treatment. In this test, the observed optimal moisture level was around 0.74% by volume. Hydrogen chloride can promote the oxidation of mercury due to chlorine atoms produced in the plasma process. Both NO and SO2 have inhibitory effects on mercury oxidation, which can be attributed to their competitive consumption of O-3 and O. (c) 2010 Elsevier By. All rights reserved.},
  author       = {Wang, Z. H. and Jiang, S. D. and Zhu, Y. Q. and Zhou, J. S. and Zhou, J. H. and Li, Zhongshan and Cen, K. F.},
  issn         = {0378-3820},
  keyword      = {DBD,Plasma,Mercury,Oxidation,Nip},
  language     = {eng},
  number       = {11},
  pages        = {1395--1400},
  publisher    = {Elsevier},
  series       = {Fuel Processing Technology},
  title        = {Investigation on elemental mercury oxidation mechanism by non-thermal plasma treatment},
  url          = {http://dx.doi.org/10.1016/j.fuproc.2010.05.012},
  volume       = {91},
  year         = {2010},
}