The Open Fuels & Energy Science Journal


ISSN: 1876-973X ― Volume 11, 2018

Thermal Dissolution of Shenfu Sub-Bituminous Coal Promoted by Lignin

Huihui Wu1, Hengfu Shui1, *, Lei Yang1, Xiaoling Wang1, Chunxiu Pan1, Zhicai Wang1, Zhiping Lei1, Shibiao Ren1, Shigang Kang1, Charles Chunbao Xu1, 2
1 School of Chemistry & Chemical Engineering, Anhui Key Laboratory of Coal Clean Conversion & Utilization, Anhui University of Technology, Ma’anshan 243002, Anhui Province, P.R. China
2 Department of Chemical and Biochemical Engineering, Western University London, Ontario, N6A 5B9, Canada



Thermal Dissolution (TD) and Co-thermal Dissolution (CTD) of Shenfu (SF) coal and lignin were studied. The effect of temperature on the TD and CTD of SF coal and lignin was discussed.


The synergistic effect of SF coal and lignin in CTD was probed with the characterization of thermal dissolution soluble fraction by elementary analysis, FTIR and TG determinations.


The results suggested that TD activity of lignin was higher than that of SF coal. Both SF coal and lignin gave their maximal thermal dissolution yield (TDY) of 57.6 and 82.5%, respectively at 360oC. In CTD of SF coal and lignin process, the experimental values (expressed by EXP) of TDY and Thermal Dissolution Soluble Yield (TSY) were both higher than the corresponding calculated weighted mean values (expressed by CAL) of TDY and TSY obtained from the individual TD of SF coal and lignin, suggesting that there existed a synergistic effect in the CTD of SF coal and lignin. Both TDY and TSY in CTD were enhanced to maximal values at 360oC with (EXP-CAL) values of 3.4 and 7.5%, respectively.


There were interactions between SF coal and lignin in the CTD process. The pyrolysis of lignin at low temperature may form some intermediates such as phenoxy radicals, and these intermediates can further cause depolymerization of coal, thus promoting the TD of coal.

Keywords: Coal, Lignin, Co-thermal dissolution, Depolymerization, Pyrolysis, Greenhouse gas.

Article Information

Identifiers and Pagination:

Year: 2018
Volume: 11
First Page: 71
Last Page: 80
Publisher Id: TOEFJ-11-71
DOI: 10.2174/1876973X01811010071

Article History:

Received Date: 25/12/2017
Revision Received Date: 25/05/2018
Acceptance Date: 29/05/2018
Electronic publication date: 14/06/2018
Collection year: 2018

© 2018 Wu et al .

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Anhui University of Technology, Maanshan City 243002, Anhui Province P.R. China, Tel: +865552311730; E-mails:;

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