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Solubility of gaseous carbon dioxide in molten LiCl-Li2O

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Title: Solubility of gaseous carbon dioxide in molten LiCl-Li2O
Authors: Wakamatsu, Takafumi Browse this author
Uchiyama, Takuya Browse this author
Natsui, Shungo Browse this author
Kikuchi, Tatsuya Browse this author
Suzuki, Ryosuke O. Browse this author →KAKEN DB
Keywords: Molten salt
Phase diagram
Carbon dioxide
Issue Date: 15-Jan-2015
Publisher: Elsevier
Journal Title: Fluid phase equilibria
Volume: 385
Start Page: 48
End Page: 53
Publisher DOI: 10.1016/j.fluid.2014.10.046
Abstract: Carbonate ions in LiCl-Li2O salt are a source of carbon contamination in the electrolytic refining of metal oxides, and their concentration is also an essential information for understanding the CO2 decomposition process. In this study, the solubility of gaseous CO2 in molten LiCl-Li2O was studied with the goal of developing processes to decompose the oxides effectively. Ar-CO2 gas mixtures were dissolved in molten salts containing various amounts of Li2O, and the solubility of the CO2 gas was calculated by measuring the mass difference between the molten salts before and after the CO2 dissolution. The molar amount of dissolved CO2 gas was almost as large as the molar quantity of Li2O when the partial pressure of CO2 was 1.0 or 0.5 atm for Li2O concentrations in the range of 0-60 mol%. This confirms that a large quantity of the oxide ions reacted with the CO2 gas, resulting in the generation of carbonate ions.
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 鈴木 亮輔

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