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Open AccessArticle

Effect of Recycle Solvent Hydrotreatment on Oil Yield of Direct Coal Liquefaction

1
School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
2
National Engineering Laboratory for Direct Coal Liquefaction, Shanghai 201108, China
*
Author to whom correspondence should be addressed.
Academic Editor: Mehrdad Massoudi
Energies 2015, 8(7), 6795-6805; https://doi.org/10.3390/en8076795
Received: 14 May 2015 / Revised: 19 June 2015 / Accepted: 23 June 2015 / Published: 1 July 2015
(This article belongs to the Special Issue Recent Advances in Coal Combustion and Gasification)
Effects of the recycle solvent hydrotreatment on oil yield of direct coal liquefaction were carried out in the 0.18 t/day direct coal liquefaction bench support unit of National Engineering Laboratory for Direct Coal Liquefaction (China). Results showed that the hydrogen-donating ability of the hydrogenated recycle solvent improved and the hydrogen consumption of solvent hydrotreatment was increased by decreasing liquid hourly space velocity (LHSV) from 1.5 to 1.0 h−1 and increasing reaction pressure from 13.7 to 19.0 MPa. The hydrogen-donating ability of the hydrogenated recycle solvent was enhanced, thus promoting the oil yield and coal conversion of the liquefaction reaction. The coal conversion and distillates yield of coal liquefaction were increased from 88.74% to 88.82% and from 47.41% to 49.10%, respectively, with the increase in the solvent hydrotreatment pressure from 13.7 to 19.0 MPa. The coal conversion and distillates of coal liquefaction were increased from 88.82% to 89.27% and from 49.10% to 54.49%, respectively, when the LHSV decreased from 1.5 to 1.0 h−1 under the solvent hydrotreatment pressure of 19.0 MPa. View Full-Text
Keywords: direct coal liquefaction; solvent; continuous device; hydrogen-donating; catalytic hydrotreating direct coal liquefaction; solvent; continuous device; hydrogen-donating; catalytic hydrotreating
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Gao, S.; Zhang, D.; Li, K. Effect of Recycle Solvent Hydrotreatment on Oil Yield of Direct Coal Liquefaction. Energies 2015, 8, 6795-6805.

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