Removal of Nitrogen from Liquid Fuels by Supercritical Fluid

2007 ◽  
pp. 155-168 ◽  
Author(s):  
Olubunmi M. Ogunsola
Keyword(s):  
Supercritical Fluid ◽  
Liquid Fuels

Microscopic versus process parameters in heavy-oil upgrading

1992 ◽  
Vol 50 (1) ◽  
pp. 366-367
Author(s):  
V.A. Munoz ◽  
R.J. Mikula ◽  
C. Payette ◽  
W.W. Lam
Keyword(s):  
Molecular Weight ◽  
Liquid Fuels ◽  
Chemical Components ◽  
Heavy Oils ◽  
Synthetic Fuels ◽  
High Hydrogen ◽  
Optical Texture ◽  
Polar Groups ◽  
Anisotropic Character ◽  
Planar Molecules

The transformation of high molecular weight components present in heavy oils into useable liquid fuels requires their decomposition by means of a variety of processes. The low molecular weight species produced recombine under controlled conditions to generate synthetic fuels. However, an important fraction undergo further recombination into higher molecular weight components, leading to the formation of coke. The optical texture of the coke can be related to its originating components. Those with high sulfur and oxygen content tend to produce cokes with small optical texture or fine mosaic, whereas compounds with relatively high hydrogen content are likely to produce large optical texture or domains. In addition, the structure of the parent chemical components, planar or nonplanar, determines the isotropic or anisotropic character of the coke. Planar molecules have a tendency to align in an approximately parallel arrangement to initiate the formation of the nematic mesophase leading to the formation of anisotropic coke. Nonplanar highly alkylated compounds and/or those rich in polar groups form isotropic coke. The aliphatic branches produce steric hindrance to alignment, whereas the polar groups participate in cross-linking reactions.

Supercritical fluid fractionation for thymoquinone enrichment in black cumin and savory isolates

Planta Medica ◽  
2009 ◽  
Vol 75 (09) ◽  
Author(s):  
M Sajfrtova ◽  
J Karban ◽  
P Kloucek ◽  
J Malik ◽  
L Kokoska
Keyword(s):  
Supercritical Fluid ◽  
Black Cumin ◽  
Supercritical Fluid Fractionation

Where is the supercritical fluid on the phase diagram?

2012 ◽  
Vol 182 (11) ◽  
pp. 1137-1156 ◽  
Author(s):  
Vadim V. Brazhkin ◽  
A.G. Lyapin ◽  
Valentin N. Ryzhov ◽  
Kostya Trachenko ◽  
Yurii D. Fomin ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Supercritical Fluid

Area-selective Cu Film Growth on TiN and SiO2 by Supercritical Fluid Deposition

2020 ◽  
Vol 140 (1) ◽  
pp. 31-36 ◽  
Author(s):  
Naoto Usami ◽  
Etsuko Ota ◽  
Akio Higo ◽  
Takeshi Momose ◽  
Yoshio Mita
Keyword(s):  
Supercritical Fluid ◽  
Film Growth ◽  
Cu Film
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