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Release characteristic of different classes of sodium during combustion of Zhun-Dong coal investigated by laser-induced breakdown spectroscopy

He, Yong; Qiu, Kunzan; Whiddon, Ronald; Wang, Zhihua; Zhu, Yanqun; Liu, Yingzu; Li, Zhongshan LU and Cen, Kefa (2015) In Science Bulletin 60(22). p.1927-1934
Abstract
Serious fouling and slagging problems are associated with the combustion of Chinese Zhun-Dong coal due to its high content of sodium (Na). Understanding the release characteristic of Na during the combustion is essential to viable utilization of this coal. In this work, coal samples were treated with a sequence of solvents: water (H2O), ammonium acetate (NH4Ac), hydrochloric acid (HCl), and the release characteristics of various classes of Na during coal combustion were investigated using the technique of laser-induced breakdown spectroscopy. The relative contribution of various Na classes to the Na release during each combustion stage was found to be similar, in the order of H2O-soluble Na > NH4Ac-soluble Na > HCl-soluble Na >... (More)
Serious fouling and slagging problems are associated with the combustion of Chinese Zhun-Dong coal due to its high content of sodium (Na). Understanding the release characteristic of Na during the combustion is essential to viable utilization of this coal. In this work, coal samples were treated with a sequence of solvents: water (H2O), ammonium acetate (NH4Ac), hydrochloric acid (HCl), and the release characteristics of various classes of Na during coal combustion were investigated using the technique of laser-induced breakdown spectroscopy. The relative contribution of various Na classes to the Na release during each combustion stage was found to be similar, in the order of H2O-soluble Na > NH4Ac-soluble Na > HCl-soluble Na > insoluble Na. Sodium released during the devolatilization stage can be attributed to each of the sodium classes. After the devolatilization stage, H2O-soluble Na and NH4Ac-soluble Na dominated the Na release during both char and ash stages. Over 64 % of the total Na released during combustion comes from the H2O-soluble Na, which suggests that the Na release during the combustion of Zhun-Dong coal can be reduced effectively after treatment by H2O washing. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Zhun-Dong coal, Laser-induced breakdown spectroscopy (LIBS), Sodium, release, Combustion, Online measurement
in
Science Bulletin
volume
60
issue
22
pages
1927 - 1934
publisher
Science China Press
external identifiers
  • wos:000365129400005
  • scopus:84947614274
ISSN
2095-9273
DOI
10.1007/s11434-015-0922-9
language
English
LU publication?
yes
id
84027d5d-6967-4574-b831-f6081eb32cdf (old id 8539749)
date added to LUP
2016-01-20 11:25:10
date last changed
2017-10-08 03:58:47
@article{84027d5d-6967-4574-b831-f6081eb32cdf,
  abstract     = {Serious fouling and slagging problems are associated with the combustion of Chinese Zhun-Dong coal due to its high content of sodium (Na). Understanding the release characteristic of Na during the combustion is essential to viable utilization of this coal. In this work, coal samples were treated with a sequence of solvents: water (H2O), ammonium acetate (NH4Ac), hydrochloric acid (HCl), and the release characteristics of various classes of Na during coal combustion were investigated using the technique of laser-induced breakdown spectroscopy. The relative contribution of various Na classes to the Na release during each combustion stage was found to be similar, in the order of H2O-soluble Na > NH4Ac-soluble Na > HCl-soluble Na > insoluble Na. Sodium released during the devolatilization stage can be attributed to each of the sodium classes. After the devolatilization stage, H2O-soluble Na and NH4Ac-soluble Na dominated the Na release during both char and ash stages. Over 64 % of the total Na released during combustion comes from the H2O-soluble Na, which suggests that the Na release during the combustion of Zhun-Dong coal can be reduced effectively after treatment by H2O washing.},
  author       = {He, Yong and Qiu, Kunzan and Whiddon, Ronald and Wang, Zhihua and Zhu, Yanqun and Liu, Yingzu and Li, Zhongshan and Cen, Kefa},
  issn         = {2095-9273},
  keyword      = {Zhun-Dong coal,Laser-induced breakdown spectroscopy (LIBS),Sodium,release,Combustion,Online measurement},
  language     = {eng},
  number       = {22},
  pages        = {1927--1934},
  publisher    = {Science China Press},
  series       = {Science Bulletin},
  title        = {Release characteristic of different classes of sodium during combustion of Zhun-Dong coal investigated by laser-induced breakdown spectroscopy},
  url          = {http://dx.doi.org/10.1007/s11434-015-0922-9},
  volume       = {60},
  year         = {2015},
}