Compositions of distillate recycle solvents derived from direct coal liquefaction in the SRC-I process

Fuel ◽  
1985 ◽  
Vol 64 (2) ◽  
pp. 242-254 ◽  
Author(s):  
Mieczyslaw M. Boduszynski ◽  
Robert J. Hurtubise ◽  
Todd W. Allen ◽  
Howard F. Silver
Keyword(s):  
Coal Liquefaction ◽  
Direct Coal Liquefaction

Hydrotreatment of Heavy Oil from Direct Coal Liquefaction on a Sulfided Ni-W/AC Catalyst

2012 ◽  
Vol 34 (24) ◽  
pp. 2287-2295 ◽  
Author(s):  
Z. P. Lei ◽  
L. J. Gao ◽  
H. F. Shui ◽  
Z. C. Wang ◽  
S. B. Ren
Keyword(s):  
Heavy Oil ◽  
Coal Liquefaction ◽  
Direct Coal Liquefaction

scholarly journals Kinetic Modelling of Low Temperature Direct Coal Liquefaction: Consideration of Dynamic Catalyst Activity

2021 ◽  
Author(s):  
Ethan Gabriel Hammond ◽  
Shaheen Amed Faizal Moonsamy ◽  
David Lokhat ◽  
Milan Carsky
Keyword(s):  
Low Temperature ◽  
Kinetic Modelling ◽  
Catalyst Activity ◽  
Coal Liquefaction ◽  
Direct Coal Liquefaction

Study on Properties of the Blends with Direct Coal Liquefaction Residue and Asphalt

2014 ◽  
Vol 488-489 ◽  
pp. 316-321 ◽  
Author(s):  
Jie Ji ◽  
Yong Shang Zhao ◽  
Shi Fa Xu
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Processing Method ◽  
Coal Liquefaction ◽  
Direct Influence ◽  
Processing Methods ◽  
High Temperature Properties ◽  
Additive Content ◽  
Direct Coal Liquefaction ◽  
Coal Liquefaction Residue

This paper studies the properties of the blends composed of DCLR (direct coal liquefaction residue) and asphalt using two different processing methods, compares the regulation that the DCLR additive content and processing method take influence on the high-temperature properties, low-temperature properties and durability of the blends. It is found that the DCLR can improve the high-temperature properties of asphalt but degrade its low-temperature properties. The properties of blends composed of DCLR, asphalt and furfural extract oil are tested and analyzed by adding a certain amount of furfural extract oil into it, which shows that adding DCLR can improve the high-temperature properties of asphalt and reduce its low-temperature properties but can hardly cause any impact on the properties of the blends. In addition, the processing method has a direct influence on the properties of blends.

Study on flow patterns in different types of direct coal liquefaction reactors

2009 ◽  
Vol 4 (5) ◽  
pp. 563-567 ◽  
Author(s):  
Xiangkun Ren ◽  
Dingye Fang ◽  
Jialu Jin ◽  
Jinsheng Gao
Keyword(s):  
Flow Patterns ◽  
Coal Liquefaction ◽  
Different Types ◽  
Direct Coal Liquefaction

Protic ionic liquids extract asphaltenes from direct coal liquefaction residue at room temperature

2013 ◽  
Vol 108 ◽  
pp. 94-100 ◽  
Author(s):  
Lu Bai ◽  
Yi Nie ◽  
Yi Li ◽  
Haifeng Dong ◽  
Xiangping Zhang
Keyword(s):  
Ionic Liquids ◽  
Room Temperature ◽  
Coal Liquefaction ◽  
Protic Ionic Liquids ◽  
Direct Coal Liquefaction ◽  
Coal Liquefaction Residue

Direct Coal Liquefaction: Low Temperature Dissolution Process

2014 ◽  
Vol 28 (2) ◽  
pp. 1012-1019 ◽  
Author(s):  
Fatemehalsadat Haghighat ◽  
Arno de Klerk
Keyword(s):  
Low Temperature ◽  
Coal Liquefaction ◽  
Dissolution Process ◽  
Direct Coal Liquefaction

scholarly journals Theoretical Study on the Mechanism of Hydrogen Donation and Transfer for Hydrogen-Donor Solvents during Direct Coal Liquefaction

Catalysts ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 648 ◽  
Author(s):  
Haigang Hao ◽  
Tong Chang ◽  
Linxia Cui ◽  
Ruiqing Sun ◽  
Rui Gao
Keyword(s):  
Density Functional ◽  
Hydrogen Gas ◽  
Hydrogen Donor ◽  
Coal Liquefaction ◽  
Hydrogen Atoms ◽  
Functional Theory ◽  
Donor Solvent ◽  
National Energy Security ◽  
Liquefaction Process ◽  
Direct Coal Liquefaction

As a country that is poor in petroleum yet rich in coal, it is significant for China to develop direct coal liquefaction (DCL) technology to relieve the pressure from petroleum shortages to guarantee national energy security. To improve the efficiency of the direct coal liquefaction process, scientists and researchers have made great contributions to studying and developing highly efficient hydrogen donor (H-donor) solvents. Nevertheless, the details of hydrogen donation and the transfer pathways of H-donor solvents are still unclear. The present work examined hydrogen donation and transfer pathways using a model H-donor solvent, tetralin, by density functional theory (DFT) calculation. The reaction condition and state of the solvent (gas or liquid) were considered, and the specific elementary reaction routes for hydrogen donation and transfer were calculated. In the DCL process, the dominant hydrogen donation mechanism was the concerted mechanism. The sequence of tetralin donating hydrogen atoms was α-H (C1–H) > δ-H (C4–H) > β-H (C2–H) > γ-H (C3–H). Compared to methyl, it was relatively hard for benzyl to obtain the first hydrogen atom from tetralin, while it was relatively easy to obtain the second and third hydrogen atoms from tetralin. Comparatively, it was easier for coal radicals to capture hydrogen atoms from the H-donor solvent than to obtain hydrogen atoms from hydrogen gas.

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