Proceedings of the 2015 2nd International Conference on Machinery, Materials Engineering, Chemical Engineering and Biotechnology

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Thermal Dissolution of Shengli Lignite in Isometric Methanol and Ethyl Acetate Mixed Solvent — Molecular Composition of the Extract and the Role of Ethyl Acetate

Authors
Xingshun Cong, Min Li, Hangyu Gao, LingLing Zhang, Niancun Ji
Corresponding Author
Xingshun Cong
Available Online December 2015.
DOI
10.2991/mmeceb-15.2016.87How to use a DOI?
Keywords
Shengli Lignite; Phenols; Thermal Dissolution Mechanism; Hydrogen Bond
Abstract

Thermal dissolution (TD) of Shengli lignite was carried out in isometric solvent of methanol and ethyl acetate (EA), methanol, and EA to offer the thermally soluble fractions 1-3 (F1-F3), respectively. F1-F3 were analyzed by gas chromatography/mass spectrometry and direct analysis in real-time ionization source/ion trap mass spectrometry (DARTIS/IT-MS). Phenols with 1-4 methyls are the most abundant composition in the extract. The DARTIS/IT-MS analysis shows that the main peaks of the molecular weight distribution of the extract are located at m/z 120-340, and trace signals are still observed at m/z 640. The extract yield of F1 is higher than those of F2 and F3, even the sum of F2 and F3 yields. The roles of EA to lignite TD were investigated by experimental comparison and molecular dynamics simulation. Both the increase in nucleophilicity and the O-H bond extension of methanol due to the formation of intermolecular hydrogen bonds between methanol and EA make the nucleophilic attacking and the scission of O-H bond easier. The transesterification reaction with EA occurs during lignite TD. These results demonstrate that the TD process can be slightly adjusted by altering the microstructure and microenvironment of methanol.

Copyright
© 2016, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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Volume Title
Proceedings of the 2015 2nd International Conference on Machinery, Materials Engineering, Chemical Engineering and Biotechnology
Series
Advances in Engineering Research
Publication Date
December 2015
ISBN
10.2991/mmeceb-15.2016.87
ISSN
2352-5401
DOI
10.2991/mmeceb-15.2016.87How to use a DOI?
Copyright
© 2016, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Cite this article

risenwbib
TY  - CONF
AU  - Xingshun Cong
AU  - Min Li
AU  - Hangyu Gao
AU  - LingLing Zhang
AU  - Niancun Ji
PY  - 2015/12
DA  - 2015/12
TI  - Thermal Dissolution of Shengli Lignite in Isometric Methanol and Ethyl Acetate Mixed Solvent — Molecular Composition of the Extract and the Role of Ethyl Acetate
BT  - Proceedings of the 2015 2nd International Conference on Machinery, Materials Engineering, Chemical Engineering and Biotechnology
PB  - Atlantis Press
SP  - 441
EP  - 446
SN  - 2352-5401
UR  - https://doi.org/10.2991/mmeceb-15.2016.87
DO  - 10.2991/mmeceb-15.2016.87
ID  - Cong2015/12
ER  -