scholarly journals Coal liquefaction process streams characterization and evaluation. FIMS analysis of direct coal liquefaction process streams

1994 ◽  
Author(s):  
R. Malhotra ◽  
D.F. McMillen
Keyword(s):  
Coal Liquefaction ◽  
Liquefaction 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.

Applications of RBI on leakage risk assessment of direct coal liquefaction process

2017 ◽  
Vol 45 ◽  
pp. 194-202 ◽  
Author(s):  
Zhan Dou ◽  
Jun-Cheng Jiang ◽  
Zhi-Rong Wang ◽  
Xu-Hai Pan ◽  
Chi-Min Shu ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Coal Liquefaction ◽  
Liquefaction Process ◽  
Direct Coal Liquefaction

Novel Use of Residue from Direct Coal Liquefaction Process†

2009 ◽  
Vol 23 (10) ◽  
pp. 4717-4722 ◽  
Author(s):  
Jianli Yang ◽  
Zhaixia Wang ◽  
Zhenyu Liu ◽  
Yuzhen Zhang
Keyword(s):  
Coal Liquefaction ◽  
Liquefaction Process ◽  
Direct Coal Liquefaction

Reaction Kinetics Study on the Heating Stage of the Shenhua Direct Coal Liquefaction Process

2015 ◽  
Vol 29 (4) ◽  
pp. 2244-2249 ◽  
Author(s):  
Xiangen Shan ◽  
Kejian Li ◽  
Xuwen Zhang ◽  
Hongbo Jiang ◽  
Huixin Weng
Keyword(s):  
Reaction Kinetics ◽  
Coal Liquefaction ◽  
Kinetics Study ◽  
Heating Stage ◽  
Liquefaction Process ◽  
Direct Coal Liquefaction
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