National Engineering Laboratory for Direct Coal Liquefaction

Shanghai, China

National Engineering Laboratory for Direct Coal Liquefaction

Shanghai, China
SEARCH FILTERS
Time filter
Source Type

Gao S.,East China University of Science and Technology | Gao S.,National Engineering Laboratory for Direct Coal Liquefaction | Zhang D.,East China University of Science and Technology | Li K.,National Engineering Laboratory for Direct Coal Liquefaction | Bai X.,National Engineering Laboratory for Direct Coal Liquefaction
Shiyou Xuebao, Shiyou Jiagong/Acta Petrolei Sinica (Petroleum Processing Section) | Year: 2014

The feed of Shenhua direct coal liquefaction solvent hydrotreatment unit was used as the hydrotreatment feedstock. The hydrotreatment of the recycle solvent was carried out in the 300 mL fixed bed reactor under a hydrogen pressure of 13.7 MPa. The effect of reaction temperature on the hydrogen donor properties of recycle solvent was studied. The hydrogenated recycle oil was used as coal liquefaction donor solvent, and evaluated with the coal liquefaction experiments in the 0.5 L stirring autoclave. The results showed that the sulfur and nitrogen contents of the recycle solvent decreased and the H/C atomic ratio of the solvent increased with the increase of reaction temperature. The hydrogen-donating ability of the hydrogenated solvent was improved as the reaction temperature increased from 340 to 380℃. When the recycle solvent hydrogenated at 380℃ was used as coal liquefaction solvent, 88.64% of the coal conversion and 57.63% of oil yield were obtained, respectively. When the hydrogenation reaction temperature reached 390℃, the hydrogen-donating ability of the donor solvent declined.


Shan X.,East China University of Science and Technology | Shan X.,National Engineering Laboratory for Direct Coal Liquefaction | Li K.,National Engineering Laboratory for Direct Coal Liquefaction | Zhang X.,National Engineering Laboratory for Direct Coal Liquefaction | And 2 more authors.
Energy and Fuels | Year: 2015

Direct coal liquefaction in the heating stage of Shenhua Shendong bituminous coal was carried out in a 0.01 t/d continuous tubular facility with iron catalyst and hydrogenated anthracene and wash oil as solvent at a residence time (t) of 3.5-6.5 min and a reaction temperature (T) of 340-450°C. The results show that when t = 3.5 min and T = 340°C, a cracking reaction of coal occurs, while the oil yield was almost zero. As the residence time and temperature each increase, coal conversion and product yield exhibit different change patterns. Especially when t = 6.5 min and T = 450°C: under these conditions, the coal conversion and oil yield reached 83.67 and 52.27 wt %, respectively. To investigate the liquefaction kinetics, a 8-lump reaction kinetic model which follow first-order irreversible reactions (r = ki dC/dt) was developed to estimate the rate constants. The results indicated that the model is perfectly valid for the heating stage, and the yield of oil and gas were mainly from coal other than preasphaltene (PAA). © 2015 American Chemical Society.


Gao S.,East China University of Science and Technology | Zhang D.,East China University of Science and Technology | Li K.,National Engineering Laboratory for Direct Coal Liquefaction
Energies | Year: 2015

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.


Jiang H.,East China University of Science and Technology | Wang X.,East China University of Science and Technology | Shan X.,East China University of Science and Technology | Shan X.,National Engineering Laboratory for Direct Coal Liquefaction | And 4 more authors.
Energy and Fuels | Year: 2015

To study the direct coal liquefaction in the isothermal stage of Shenhua Shendong bituminous coal, the direct coal liquefaction with an iron-based catalyst was carried out in a 0.01 ton/day continuous tubular facility in the temperature range of 445-465 °C, with hydrogenated anthracene and wash oil as the solvent. An eight-lump kinetic model of the isothermal stage was proposed, and the kinetic parameters were estimated. The result showed that, in the isothermal stage, the oil was mainly obtained from pre-asphaltene and asphaltene (PAA) rather than from coal directly. The model was valid for the isothermal stage of direct coal liquefaction. © 2015 American Chemical Society.

Loading National Engineering Laboratory for Direct Coal Liquefaction collaborators
Loading National Engineering Laboratory for Direct Coal Liquefaction collaborators