Production of the glycerol-impregnated hybrid coal and its characterization

[Display omitted] •Glycerol-impregnated hybrid coal was prepared by replacing moisture in the coal pores with glycerol.•Simple blend of coal and glycerol showed independent combustion behavior.•Glycerol-impregnated hybrid coal showed single combustion behavior.•Glycerol-impregnated hybrid coal makes...

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Published in:Fuel (Guildford) 2014-02, Vol.118, p.33-40
Main Authors: Bae, Jong-Soo, Lee, Dong-Wook, Lee, Young-Joo, Park, Se-Joon, Hong, Jai-Chang, Kim, Joeng-Geun, Lee, Byoung-Hwa, Jeon, Chung-Hwan, Han, Choon, Choi, Young-Chan
Format: Article
Language:English
Subjects:
Applied sciences
Biomass
Blended
Co-combustion
Coal
Coal fired powerplants
Combustion
Emissions control
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Fuels
Glycerol
Glycerol-impregnated hybrid coal
Glycerols
Liquid biomass
Low rank coal
Natural energy
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Summary:[Display omitted] •Glycerol-impregnated hybrid coal was prepared by replacing moisture in the coal pores with glycerol.•Simple blend of coal and glycerol showed independent combustion behavior.•Glycerol-impregnated hybrid coal showed single combustion behavior.•Glycerol-impregnated hybrid coal makes it possible to use glycerol as a fuel for coal-fired power plants. Biomass recently has been blended with fossil fuels for the environment-friendly aspect such as reduction of carbon dioxide emissions. However, in coal-fired power plants, bituminous coal is blended with only the solid-phase biomass like wood chips for use of the existing coal feeding facility. Furthermore, as coal and biomass individually combust, it is difficult to use the existing coal boilers. In this study, to resolve these problems, glycerol was used as an additive to make a hybrid coal. Glycerol-impregnated hybrid coal is a new fuel technology in which glycerol play an important role in an artificial volatile matter by substituting inherent moisture in the coal pores with glycerol. When glycerol is simply blended with coal, the combustion behaviors of glycerol and coal are independent because glycerol evaporates at 443K. However, if the coal pores are filled with glycerol, glycerol takes on a combustion behavior like that of a volatile matter, resulting in a two-in-one fuel having a single combustion behavior. These results makes it possible to use glycerol as a fuel for coal-fired power plants and reduce carbon dioxide emissions.
ISSN:0016-2361
1873-7153
DOI:10.1016/j.fuel.2013.10.022