TY - JOUR
T1 - Thermoplastic Properties of Coal and Coal Extract
AU - Chu, Chia Ching
AU - Chang, Chih Min
AU - Wang, Der Her
AU - Whang, Thou Jen
N1 - Funding Information:
Financial support from the CSC (Kaohsiung, Taiwan) under Contract RE99011 is acknowledged. Chia-Ching Chu acknowledges the careful reading and helpful suggestions on details of the paper provided by Rui-En Hsu.
Publisher Copyright:
© 2017 American Chemical Society.
PY - 2017/11/16
Y1 - 2017/11/16
N2 - The aim of this study is to find a simple, effective, and non-destructive way to estimate the fluidity of coal. Three kinds of metallurgical coals were blended in a specific ratio for fluidity measurement by a Gieseler plastometer and coke strength by the Roga test. One of the metallurgical coals was extracted with four kinds of solvents. The solvent-extracted extracts further underwent heat treatment at different temperatures and were then added to the blended coal to examine the change of fluidity and coke strength. Both the heat-treated and untreated coal extracts were further investigated by elemental analysis, thermogravimetric analysis, solid-state 13C nuclear magnetic resonance, and X-ray diffractometry, and it was found that the heat treatment will increase the degree of graphitization. The aromatic carbon content was found to correlate significantly with the fluidity of coal, and the relationship among the ratio of aromatic carbon/aliphatic carbon, aromaticity, and fluidity was studied in this work. Finally, X-ray diffractometry is suggested to be a non-destructive method to estimate the fluidity of coal.
AB - The aim of this study is to find a simple, effective, and non-destructive way to estimate the fluidity of coal. Three kinds of metallurgical coals were blended in a specific ratio for fluidity measurement by a Gieseler plastometer and coke strength by the Roga test. One of the metallurgical coals was extracted with four kinds of solvents. The solvent-extracted extracts further underwent heat treatment at different temperatures and were then added to the blended coal to examine the change of fluidity and coke strength. Both the heat-treated and untreated coal extracts were further investigated by elemental analysis, thermogravimetric analysis, solid-state 13C nuclear magnetic resonance, and X-ray diffractometry, and it was found that the heat treatment will increase the degree of graphitization. The aromatic carbon content was found to correlate significantly with the fluidity of coal, and the relationship among the ratio of aromatic carbon/aliphatic carbon, aromaticity, and fluidity was studied in this work. Finally, X-ray diffractometry is suggested to be a non-destructive method to estimate the fluidity of coal.
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U2 - 10.1021/acs.energyfuels.7b02327
DO - 10.1021/acs.energyfuels.7b02327
M3 - Article
AN - SCOPUS:85034569147
SN - 0887-0624
VL - 31
SP - 11947
EP - 11953
JO - Energy and Fuels
JF - Energy and Fuels
IS - 11
ER -