Effect of coal properties, temperature, and mineral matter upon a hydrogen-donor solvent during coal liquefaction

1989 ◽  
Vol 3 (2) ◽  
pp. 236-242 ◽  
Author(s):  
B. Chawla ◽  
R. Keogh ◽  
B. H. Davis
Keyword(s):  
Hydrogen Donor ◽  
Coal Liquefaction ◽  
Mineral Matter ◽  
Donor Solvent ◽  
Coal Properties

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.

scholarly journals Basic study of extractive liquefaction of coal. II. Coal liquefaction with the recycled hydrogen donor solvent.

1985 ◽  
Vol 64 (1) ◽  
pp. 26-35
Author(s):  
Ryohei MINAMI ◽  
Tamio SHIRAFUJI ◽  
Mikio KATO ◽  
Yoshihiko SUNAMI
Keyword(s):  
Hydrogen Donor ◽  
Coal Liquefaction ◽  
Basic Study ◽  
Donor Solvent

scholarly journals Transformation Characteristics of Hydrogen-Donor Solvent Tetralin in the Process of Direct Coal Liquefaction

2019 ◽  
Vol 7 ◽  
Author(s):  
Hai-zhou Chang ◽  
Jun-qi Li ◽  
Shuai Du ◽  
Kai-yuan Shen ◽  
Qun Yang ◽  
...  
Keyword(s):  
Hydrogen Donor ◽  
Coal Liquefaction ◽  
Donor Solvent ◽  
Direct Coal Liquefaction

Relative reactivity of hydrogen donor solvent in coal liquefaction

Fuel ◽  
1985 ◽  
Vol 64 (9) ◽  
pp. 1242-1245 ◽  
Author(s):  
Yoshio Kamiya ◽  
Shinichi Nagae
Keyword(s):  
Hydrogen Donor ◽  
Coal Liquefaction ◽  
Relative Reactivity ◽  
Donor Solvent

Fundamental study of the effect of hydrogen donor solvent on coal liquefaction

1986 ◽  
Vol 14 ◽  
pp. 67-78 ◽  
Author(s):  
Yoshiki Sato ◽  
Atsushi Inaba ◽  
Isamu Uemasu ◽  
Satoshi Kushiyama
Keyword(s):  
Hydrogen Donor ◽  
Coal Liquefaction ◽  
Fundamental Study ◽  
Donor Solvent
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