Citation: WU Fa-peng, LU Hao, YAN Jie, WANG Rui-yu, ZHAO Yun-peng, WEI Xian-yong. Differences in molecular composition of soluble organic species in two Chinese sub-bituminous coals with different reducibility[J]. Journal of Fuel Chemistry and Technology, ;2018, 46(7): 769-777. shu

Differences in molecular composition of soluble organic species in two Chinese sub-bituminous coals with different reducibility

WU Fa-peng ¹ ,
LU Hao ¹ ,
YAN Jie ¹ ,
WANG Rui-yu ³ ,
ZHAO Yun-peng ^1,2,, ,
WEI Xian-yong ¹

1.
Key Laboratory of Coal Processing and Efficient Utilization, Ministry of Education, China University of Mining & Technology, Xuzhou 221116, China
2.
State Key Laboratory Breeding Base of Coal Science and Technology Co-founded by Shanxi Province and Ministry Education, Taiyuan University of Technology, Taiyuan 030024, China
3.
Low Carbon Energy Institute, China University of Mining & Technology, Xuzhou 221008, China

Corresponding author: ZHAO Yun-peng, yunpengzhao2009@163.com
Received Date: 29 March 2018
Revised Date: 22 June 2018

Fund Project: The project was supported by the National Natural Science Foundation of China (21206188), Open Foundation from State Key Laboratory Breeding Base of Coal Science and Technology Co-founded by Shanxi Province and Ministry Education (MKX201502), and National Undergraduate Training Programs for Innovation of China University of Mining and Technology (201610290036)the National Natural Science Foundation of China 21206188Open Foundation from State Key Laboratory Breeding Base of Coal Science and Technology Co-founded by Shanxi Province and Ministry Education MKX201502National Undergraduate Training Programs for Innovation of China University of Mining and Technology 201610290036

Figures(7)

Naomaohu sub-bituminous (NS) with weak reducibility and Buliangou sub-bituminous (BS) with strong reducibility were extracted in isometric carbon disulfide/acetone mixed solvent to get extracts and extraction residues (ERs). The ERs were thermal dissolved in cyclohexane and methanol to get soluble portions (SPs). The yields of the extracts from NS (E_NS) and BS (E_BS) are 10.6% and 8.0%, respectively, and the total yields of the SPs from NS and BS at 300℃ are 36.3% and 11.5%, respectively, indicating the solubility of the organic species in NS are better than that in BS. Arenes are the dominated compounds both in E_NS and E_BS. The relative contents of aliphatic hydrocarbons and phenols in the SPs of NS are obvious higher than those of BS. The molecular weight distribution of the compounds in E_NS is wider than that in E_BS, while the molecular weight distribution of the compounds in the SPs from NS is narrower than that from BS.
- sub-bituminous coals,
- soluble organic species,
- molecular composition,
- thermal dissolution
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