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Title: TiO2溶融塩電解還元時のガス発生反応
Other Titles: Gas Generation Reactions during TiO2 Reduction Using Molten Salt
Authors: 原口, 靖史1 Browse this author
澁谷, 凌太2 Browse this author
夏井, 俊悟3 Browse this author
菊地, 竜也4 Browse this author →KAKEN DB
鈴木, 亮輔5 Browse this author →KAKEN DB
Authors(alt): Haraguchi, Yasushi1
Shibuya, Ryota2
Natsui, Shungo3
Kikuchi, Tatsuya4
Suzuki, Ryosuke O.5
Keywords: molten salt
calcium chloride
titanium dioxide
cyclic voltammetry
carbonate ion
gas evolution
Issue Date: 1-Nov-2019
Publisher: 日本金属学会
Journal Title: 日本金属学会誌
Journal Title(alt): Journal of the Japan Institute of Metals and Materials
Volume: 83
Issue: 11
Start Page: 441
End Page: 448
Publisher DOI: 10.2320/jinstmet.JAW201901
Abstract: Titanium dioxides were reduced to metallic titanium via molten salt electrolysis using CaCl2. It was reported that the efficiency was low because some side reactions produced carbon precipitates. To produce titanium more efficiently, these electrochemical side reactions were examined by cyclic voltammetry (CV). O2- reacted with the carbon anode to form CO and CO2 gas bubbles, which easily dissolved into the molten salt and formed CO32-, subsequently generating carbon powder. CV was performed after interrupting electrolysis temporarily. The electrochemical reduction of CO32- in the cathodic scan was not observed, suggesting that CO32- was spontaneously reduced by Ca during electrolysis. Anodic reactions preceding Cl2 gas generation occurred in three steps: CO and CO2 gas generation related to O2-, and successive CO2 generation related to CO32-.
Type: article
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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