Correlation of mass transfer coefficient in the extraction of plant oil in a fixed bed for supercritical CO2

2007 ◽  
Vol 78 (1) ◽  
pp. 33-40 ◽  
Author(s):  
John Shi ◽  
Yukio Kakuda ◽  
Xiaoqin Zhou ◽  
Gauri Mittal ◽  
Qinmin Pan
Keyword(s):  
Mass Transfer ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Supercritical Co2 ◽  
Fixed Bed ◽  
Plant Oil

Thermodynamics and statistical correlation between supercritical-CO2 fluid extraction and bioactivity profile of locally available Mexican plants extracts

2017 ◽  
Vol 122 ◽  
pp. 27-34 ◽  
Author(s):  
J. Saúl García‐Pérez ◽  
Felipe Robledo-Padilla ◽  
Sara Paulina Cuellar-Bermudez ◽  
Alejandra Arévalo-Gallegos ◽  
Roberto Parra-Saldivar ◽  
...  
Keyword(s):  
Supercritical Co2 ◽  
Statistical Correlation ◽  
Fluid Extraction ◽  
Supercritical Co2 Fluid ◽  
Supercritical Co2 Fluid Extraction ◽  
Bioactivity Profile

Supercritical CO2 Fluid Leaching of Uranium from Sandstone Type Ores

2013 ◽  
Vol 634-638 ◽  
pp. 3517-3521 ◽  
Author(s):  
Wei Guang Wang ◽  
Kai Xuan Tan ◽  
Er Ju Xie ◽  
Jiang Liu ◽  
Gui Long Cai
Keyword(s):  
Supercritical Co2 ◽  
Nuclear Power ◽  
Aqueous Media ◽  
Low Grade ◽  
Fluid Extraction ◽  
Uranium Ore ◽  
Uranium Leaching ◽  
Uranyl Carbonate ◽  
Supercritical Co2 Fluid ◽  
Supercritical Co2 Fluid Extraction

Uranium is an important fuel for nuclear power, so the mining and milling of uranium is the base for development of nuclear power. Our experiments study is about the supercritical CO2 fluid extraction of uranium in low grade uranium ore, and the influence of aqueous medium, oxidants, chelating agents and other factors on the uranium leaching. In aqueous media, Fe2 (SO4)3 as the oxidants, supercritical CO2 fluid extraction of uranium has the best effect, the uranium leaching rate reaches 90.44%, significantly higher than that of the conventional acid and alkaline leaching. In the process of extraction of uranium in supercritical CO2 fluid, the uranium in uranium ore is first oxidized to hexavalent uranium, and then forms high solubility of uranyl carbonate complexes. Supercritical CO2 fluid is expected to be used in in-situ leaching of uranium mining of the low grade sandstone uranium deposits.

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