NDLI: Characterization of chars made of solvent extracted coals

Content Provider	Springer Nature Link
Author	Cho, Wan taek Kim, Sangdo Choi, Ho kyung Rhim, Young joon Lim, Jeong hwan Lee, Si hyun Yoo, Jiho
Copyright Year	2011
Abstract	Thermal extraction of a sub-bituminous coal (Roto south) using 1-methylnaphthalene solvent has produced ash-free coals successfully. The extracted (EC) and residual coal (RC) as well as its parent coal (PC) were pyrolyzed at 300–900 °C and then the carbonized products were characterized. The extracted coal (EC) contained lower molecular weight components than PC and RC, showing much higher fuel ratio after the pyrolysis. EC is expected to be advantageous over PC and RC when applied to coal gasification and reforming, because EC is readily decomposed and volatized. The heating value of EC chars (7,610–8,120 kcal/kg) was independent of the pyrolysis temperature and was higher than those of PC and RC chars, especially for the chars carbonized below 600 °C. The oxygen content of PC chars at T≤600 °C was mostly at least twice that of EC/RC chars, pointing out the difference in the chemical composition. 13CNMR and FT-IR spectra revealed the release of aliphatic hydrocarbons and reactive functional groups with increasing temperature, in agreement with ultimate/proximate analysis results.
Starting Page	190
Ending Page	195
Page Count	6
File Format	PDF
ISSN	02561115
Journal	Korean Journal of Chemical Engineering
Volume Number	29
Issue Number	2
e-ISSN	19757220
Language	English
Publisher	Springer US
Publisher Date	2011-11-07
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Coal Char Ash-free Coal Low Rank Coal Solvent Extraction Carbonization Biotechnology Industrial Chemistry/Chemical Engineering Materials Science Catalysis
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering

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