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

Shansong Gao, Dexiang Zhang and Kejian Li
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Shansong Gao: School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
Dexiang Zhang: School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
Kejian Li: National Engineering Laboratory for Direct Coal Liquefaction, Shanghai 201108, China

Energies, 2015, vol. 8, issue 7, 1-11

Abstract: 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.

Keywords: direct coal liquefaction; solvent; continuous device; hydrogen-donating; catalytic hydrotreating (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2015
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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