Experimental Study of Supercritical Ethanol Deoxygenation of Shengli Lignite

Zhou Jianming; Hu Xiuxiu; Wang Yiwei; Rao Tianxi; Xu Deping

doi:doi:10.11648/j.ajche.20180606.11

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Experimental Study of Supercritical Ethanol Deoxygenation of Shengli Lignite

Zhou Jianming, Hu Xiuxiu, Wang Yiwei, Rao Tianxi, Xu Deping

Published in American Journal of Chemical Engineering (Volume 6, Issue 6)

Received: 24 October 2018 Accepted: 20 November 2018 Published: 24 December 2018

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Abstract

In this study, supercritical ethanol process is employed to remove the oxygen-containing functional groups in lignite and the effects of temperature, residence time and ethanol /coal mass ratio on the deoxygenation were systematically investigated. Specifically, the solid and liquid products after supercritical ethanol deoxygenation were characterized by FT-IR and GC/MS. Considering the deoxygenation rate (61.40%) and solid yield (89.62%), the optimal deoxygenation was achieved at 270°C with the residence time of 90 mins and alcohol/coal mass ratio of 5:1. In the liquid products generated at 220°C, the content of aromatic compounds was about 80% while the content of phenols and ester compounds was less than 5%. However, for the liquid products obtained at 270°C, the content of aromatic compounds was decreased by 31.69 % while the volume fraction of O-containing compounds was increased by 2.81 % and the content of phenols and ester compounds was increased to about 35%. During supercritical ethanol process, ether oxygen bonds were cracked. For the O-containing species in the products, phenol and its derivatives were the main components in solid products and esters (mostly ethyl esters) in liquid products.

Published in	American Journal of Chemical Engineering (Volume 6, Issue 6)
DOI	10.11648/j.ajche.20180606.11
Page(s)	121-125
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

Lignite, Supercritical Ethanol, Deoxygenation Rate, Solid Product Yield, Phenols, Esters

References

[1]	Dai Hewu, Xie Keyu. Lignite utilization technology [M]. Coal Industry Press, 1999.
[2]	Li Enli, Gao Jianguo, Cui Hongmei. Risk analysis of lignite upgrading project in China [J]. Coal Economic Research, 2009(12):25-26.
[3]	Qu Jin-hou, Tao Xiu-xiang, Liu Jin-yan, et al. Research Progress on Upgrading Technology of Lignite [J], Coal Science and Technology, 2011, 39(11):121-125.
[4]	Shao Junjie. The Development Status of Lignite Quality Improvement Technology and Development Trend of China's Lignite Quality Improvement Technology [J]. Northwest Coal, 2009, 7(2):17-22.
[5]	Xia Hao, Liu Quanrun, Ma Mingjie, Progress of lignite upgrading technology [J]. Clean Coal Technology, 2010, 16(4):56-58.
[6]	Han Xingbu. Supercritical Fluid Science and Technology [M]. China Petrochemical Press, 2005.
[7]	Guo Guiquan, Wag Hong-juan, Chen Fan-geng. Thermochemical Liquefaction of Lignocellulosic Materials in Hydrogen-donor Solvent [J]. Journal of Cellulose Science and Technology, 2003, 11(2):41-50.
[8]	Luan Haiyan, Wang Aiguo, Zhang Qian, et al. Study on supercritical methanol treatment to remove oxide from lignite [J]. Coal Conversion, 2012, 35(4):30-34.
[9]	Zhang Qian, Wang Aiguo, Luan Haiyan, et al. Experiment Study on Supercritical Methanol Affected to Pre-treatment of Lignite Liquefaction [J]. Coal Engineering, 2013, 45(3):113-116.
[10]	[10] Bunyakiat K, Makmee S, Ruengwit Sawangkeaw A, et al. Continuous Production of Biodiesel via Transesterification from Vegetable Oils in Supercritical Methanol [J]. Energy Fuels, 2006, 20(2):812-817.
[11]	Zhou GuoJiang, Su Jun, et al. Effect of water-heat treatment on properties of lignite and compressive strength of briquettes [J]. Jounal of Heilongjiang Institute of Science & Technology, 2010, 20(2):107-110.
[12]	Zhu Xuedong, Zhu Zibin. Quantitative Determination of Oxygen-Containing Functional Groups in Coal by FTIR Spectroscopy [J]. Journal of Fuel Chemistry and Technology, 1999(4):335-339.
[13]	Zheng Qingrong, Zrng Fangui, Zhang Shitong. FT-IR study on structure evolution of middle maturate coals [J]. Journal of china coal society, 2011, 36(3):481-486.
[14]	Sobkowiak M, Painter P. Determination of the aliphatic and aromatic CH contents of coals by FT-i.r.: studies of coal extracts [J]. Fuel, 1992, 71(10):1105–1125.
[15]	Ashida R, Nakgawa K, Oga M, et al. Fractionation of coal by use of high temperature solvent extraction technique and characterization of the fractions [J]. Fuel, 2008, 87(4–5):576-582.
[16]	Wang Yugao, Wei Xianyong, Li Peng, et al. Mechanism analysis for supercritical ethanolysis of Huolinguole lignite [J]. Journal of Fuel Chemistry and Technology, 2012, 40(3):263-266.

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APA Style

Zhou Jianming, Hu Xiuxiu, Wang Yiwei, Rao Tianxi, Xu Deping. (2018). Experimental Study of Supercritical Ethanol Deoxygenation of Shengli Lignite. American Journal of Chemical Engineering, 6(6), 121-125. https://doi.org/10.11648/j.ajche.20180606.11

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ACS Style

Zhou Jianming; Hu Xiuxiu; Wang Yiwei; Rao Tianxi; Xu Deping. Experimental Study of Supercritical Ethanol Deoxygenation of Shengli Lignite. Am. J. Chem. Eng. 2018, 6(6), 121-125. doi: 10.11648/j.ajche.20180606.11

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AMA Style

Zhou Jianming, Hu Xiuxiu, Wang Yiwei, Rao Tianxi, Xu Deping. Experimental Study of Supercritical Ethanol Deoxygenation of Shengli Lignite. Am J Chem Eng. 2018;6(6):121-125. doi: 10.11648/j.ajche.20180606.11

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@article{10.11648/j.ajche.20180606.11,
  author = {Zhou Jianming and Hu Xiuxiu and Wang Yiwei and Rao Tianxi and Xu Deping},
  title = {Experimental Study of Supercritical Ethanol Deoxygenation of Shengli Lignite},
  journal = {American Journal of Chemical Engineering},
  volume = {6},
  number = {6},
  pages = {121-125},
  doi = {10.11648/j.ajche.20180606.11},
  url = {https://doi.org/10.11648/j.ajche.20180606.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajche.20180606.11},
  abstract = {In this study, supercritical ethanol process is employed to remove the oxygen-containing functional groups in lignite and the effects of temperature, residence time and ethanol /coal mass ratio on the deoxygenation were systematically investigated. Specifically, the solid and liquid products after supercritical ethanol deoxygenation were characterized by FT-IR and GC/MS. Considering the deoxygenation rate (61.40%) and solid yield (89.62%), the optimal deoxygenation was achieved at 270°C with the residence time of 90 mins and alcohol/coal mass ratio of 5:1. In the liquid products generated at 220°C, the content of aromatic compounds was about 80% while the content of phenols and ester compounds was less than 5%. However, for the liquid products obtained at 270°C, the content of aromatic compounds was decreased by 31.69 % while the volume fraction of O-containing compounds was increased by 2.81 % and the content of phenols and ester compounds was increased to about 35%. During supercritical ethanol process, ether oxygen bonds were cracked. For the O-containing species in the products, phenol and its derivatives were the main components in solid products and esters (mostly ethyl esters) in liquid products.},
 year = {2018}
}

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TY  - JOUR
T1  - Experimental Study of Supercritical Ethanol Deoxygenation of Shengli Lignite
AU  - Zhou Jianming
AU  - Hu Xiuxiu
AU  - Wang Yiwei
AU  - Rao Tianxi
AU  - Xu Deping
Y1  - 2018/12/24
PY  - 2018
N1  - https://doi.org/10.11648/j.ajche.20180606.11
DO  - 10.11648/j.ajche.20180606.11
T2  - American Journal of Chemical Engineering
JF  - American Journal of Chemical Engineering
JO  - American Journal of Chemical Engineering
SP  - 121
EP  - 125
PB  - Science Publishing Group
SN  - 2330-8613
UR  - https://doi.org/10.11648/j.ajche.20180606.11
AB  - In this study, supercritical ethanol process is employed to remove the oxygen-containing functional groups in lignite and the effects of temperature, residence time and ethanol /coal mass ratio on the deoxygenation were systematically investigated. Specifically, the solid and liquid products after supercritical ethanol deoxygenation were characterized by FT-IR and GC/MS. Considering the deoxygenation rate (61.40%) and solid yield (89.62%), the optimal deoxygenation was achieved at 270°C with the residence time of 90 mins and alcohol/coal mass ratio of 5:1. In the liquid products generated at 220°C, the content of aromatic compounds was about 80% while the content of phenols and ester compounds was less than 5%. However, for the liquid products obtained at 270°C, the content of aromatic compounds was decreased by 31.69 % while the volume fraction of O-containing compounds was increased by 2.81 % and the content of phenols and ester compounds was increased to about 35%. During supercritical ethanol process, ether oxygen bonds were cracked. For the O-containing species in the products, phenol and its derivatives were the main components in solid products and esters (mostly ethyl esters) in liquid products.
VL  - 6
IS  - 6
ER  -

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Author Information

Zhou Jianming

China Coal Research Institute, Energy Conservation and Engineering Technology Research Institute, Beijing, China
Hu Xiuxiu

China Coal Research Institute, Energy Conservation and Engineering Technology Research Institute, Beijing, China
Wang Yiwei

China Coal Research Institute, Energy Conservation and Engineering Technology Research Institute, Beijing, China
Rao Tianxi

China Coal Research Institute, Energy Conservation and Engineering Technology Research Institute, Beijing, China
Xu Deping

China Coal Research Institute, Energy Conservation and Engineering Technology Research Institute, Beijing, China

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APA Style

Zhou Jianming, Hu Xiuxiu, Wang Yiwei, Rao Tianxi, Xu Deping. (2018). Experimental Study of Supercritical Ethanol Deoxygenation of Shengli Lignite. American Journal of Chemical Engineering, 6(6), 121-125. https://doi.org/10.11648/j.ajche.20180606.11

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ACS Style

Zhou Jianming; Hu Xiuxiu; Wang Yiwei; Rao Tianxi; Xu Deping. Experimental Study of Supercritical Ethanol Deoxygenation of Shengli Lignite. Am. J. Chem. Eng. 2018, 6(6), 121-125. doi: 10.11648/j.ajche.20180606.11

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AMA Style

Zhou Jianming, Hu Xiuxiu, Wang Yiwei, Rao Tianxi, Xu Deping. Experimental Study of Supercritical Ethanol Deoxygenation of Shengli Lignite. Am J Chem Eng. 2018;6(6):121-125. doi: 10.11648/j.ajche.20180606.11

Copy | Download

@article{10.11648/j.ajche.20180606.11,
  author = {Zhou Jianming and Hu Xiuxiu and Wang Yiwei and Rao Tianxi and Xu Deping},
  title = {Experimental Study of Supercritical Ethanol Deoxygenation of Shengli Lignite},
  journal = {American Journal of Chemical Engineering},
  volume = {6},
  number = {6},
  pages = {121-125},
  doi = {10.11648/j.ajche.20180606.11},
  url = {https://doi.org/10.11648/j.ajche.20180606.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajche.20180606.11},
  abstract = {In this study, supercritical ethanol process is employed to remove the oxygen-containing functional groups in lignite and the effects of temperature, residence time and ethanol /coal mass ratio on the deoxygenation were systematically investigated. Specifically, the solid and liquid products after supercritical ethanol deoxygenation were characterized by FT-IR and GC/MS. Considering the deoxygenation rate (61.40%) and solid yield (89.62%), the optimal deoxygenation was achieved at 270°C with the residence time of 90 mins and alcohol/coal mass ratio of 5:1. In the liquid products generated at 220°C, the content of aromatic compounds was about 80% while the content of phenols and ester compounds was less than 5%. However, for the liquid products obtained at 270°C, the content of aromatic compounds was decreased by 31.69 % while the volume fraction of O-containing compounds was increased by 2.81 % and the content of phenols and ester compounds was increased to about 35%. During supercritical ethanol process, ether oxygen bonds were cracked. For the O-containing species in the products, phenol and its derivatives were the main components in solid products and esters (mostly ethyl esters) in liquid products.},
 year = {2018}
}

Copy | Download

TY  - JOUR
T1  - Experimental Study of Supercritical Ethanol Deoxygenation of Shengli Lignite
AU  - Zhou Jianming
AU  - Hu Xiuxiu
AU  - Wang Yiwei
AU  - Rao Tianxi
AU  - Xu Deping
Y1  - 2018/12/24
PY  - 2018
N1  - https://doi.org/10.11648/j.ajche.20180606.11
DO  - 10.11648/j.ajche.20180606.11
T2  - American Journal of Chemical Engineering
JF  - American Journal of Chemical Engineering
JO  - American Journal of Chemical Engineering
SP  - 121
EP  - 125
PB  - Science Publishing Group
SN  - 2330-8613
UR  - https://doi.org/10.11648/j.ajche.20180606.11
AB  - In this study, supercritical ethanol process is employed to remove the oxygen-containing functional groups in lignite and the effects of temperature, residence time and ethanol /coal mass ratio on the deoxygenation were systematically investigated. Specifically, the solid and liquid products after supercritical ethanol deoxygenation were characterized by FT-IR and GC/MS. Considering the deoxygenation rate (61.40%) and solid yield (89.62%), the optimal deoxygenation was achieved at 270°C with the residence time of 90 mins and alcohol/coal mass ratio of 5:1. In the liquid products generated at 220°C, the content of aromatic compounds was about 80% while the content of phenols and ester compounds was less than 5%. However, for the liquid products obtained at 270°C, the content of aromatic compounds was decreased by 31.69 % while the volume fraction of O-containing compounds was increased by 2.81 % and the content of phenols and ester compounds was increased to about 35%. During supercritical ethanol process, ether oxygen bonds were cracked. For the O-containing species in the products, phenol and its derivatives were the main components in solid products and esters (mostly ethyl esters) in liquid products.
VL  - 6
IS  - 6
ER  -

Copy | Download