TiO2 溶融塩電解還元時のガス発生反応

Translated title of the contribution: Gas generation reactions during TiO2 reduction using molten salt

Yasushi Haraguchi, Ryota Shibuya, Shungo Natsui, Tatsuya Kikuchi, Ryosuke O. Suzuki

Research output: Contribution to journalArticle

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 CO3 2-, subsequently generating carbon powder. CV was performed after interrupting electrolysis temporarily. The electrochemical reduction of CO3 2- in the cathodic scan was not observed, suggesting that CO3 2- 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 CO3 2-

Translated title of the contributionGas generation reactions during TiO2 reduction using molten salt
Original languageJapanese
Pages (from-to)441-448
Number of pages8
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume83
Issue number11
DOIs
Publication statusPublished - 2019 Jan 1

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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