Experimental Study of Supercritical Ethanol Deoxygenation of Shengli Lignite
American Journal of Chemical Engineering
Volume 6, Issue 6, November 2018, Pages: 121-125
Received: Oct. 24, 2018;
Accepted: Nov. 20, 2018;
Published: Dec. 24, 2018
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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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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.
Lignite, Supercritical Ethanol, Deoxygenation Rate, Solid Product Yield, Phenols, Esters
To cite this article
Experimental Study of Supercritical Ethanol Deoxygenation of Shengli Lignite, American Journal of Chemical Engineering.
Vol. 6, No. 6,
2018, pp. 121-125.
Copyright © 2018 Authors retain the copyright of this article.
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