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Innovative production process of Ti and Si by electrolysis in molten CaCl2 at high temperature

Research Project

Project/Area Number 18H01763
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 26060:Metals production and resources production-related
Research InstitutionKansai University

Principal Investigator

Takenaka Toshihide  関西大学, 化学生命工学部, 教授 (60197324)

Co-Investigator(Kenkyū-buntansha) 森重 大樹  関西大学, 化学生命工学部, 准教授 (30530076)
Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000)
Fiscal Year 2021: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2020: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2019: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2018: ¥7,540,000 (Direct Cost: ¥5,800,000、Indirect Cost: ¥1,740,000)
Keywordsチタン / シリコン / アルミニウム / 溶融塩電解 / CaCl2 / 液体金属 / 塩化カルシウム / ランタン / シャトル反応 / 溶融塩 / 電解製錬
Outline of Final Research Achievements

Electrolytic production of Ti metal and Si metal in molten CaCl2 with their oxides was investigated in this study.
TiO2 dissolved in molten CaCl2 with CaO, and Ti metal electrodeposited. The molar ratio of CaO to TiO2 strongly affected the Ti metal deposition. Ti metal was obtained only in the bath where CaO:TiO2 = 3:2., but the obtained Ti was a little even under this condition. It was suggested that the so-called shuttle reaction hindered the Ti deposition.Calcium silicate dissolved in molten CaCl2, and Si metal was obtained. The influence of the molar ratio of CaO to SiO2 on the Si deposition was seen, but Si metal electrodeposited effectively under the suitable condition.

Academic Significance and Societal Importance of the Research Achievements

本研究により,シリコンについては本研究で提案する手法で効率的に製造可能であることが示された.また,提案する手法でチタンが効率的に製造できない理由についても詳しく検討を行い,今後その課題を克服するための知見を得た.さらに,アルミニウムの新規な製造法の開発につながる成果も得られた.
本研究の成果は,低環境負荷のチタンやシリコンの革新的製造法の開発につながるものであり,ゼロカーボン社会の実現に資するものと考えている.

Report

(5 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • 2018 Annual Research Report

Research Products

(22 results)

All 2021 2020 2019 2018

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (18 results) (of which Int'l Joint Research: 3 results,  Invited: 2 results)

  • [Journal Article] Al Electrodeposition in Molten CaCl2 with Various Calcium Aluminates2020

    • Author(s)
      Iwai Yuta、Morishige Taiki、Takenaka Toshihide
    • Journal Title

      ECS Transactions

      Volume: 98 Pages: 333-340

    • DOI

      10.1149/09810.0333ecst

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Influence of bath composition on Ti metal deposition in molten CaCl2 containing calcium titanate2020

    • Author(s)
      Takenaka T.、Okada H.、Shimokawa R.、Morishige T.
    • Journal Title

      MATEC Web of Conferences

      Volume: 321 Pages: 07010-07010

    • DOI

      10.1051/matecconf/202032107010

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Electrodeposition of Si in Molten CaCl2 above 1300K2018

    • Author(s)
      Takenaka Toshihide、Shimokawa Ryoya、Okada Haruka、Morishige Taiki
    • Journal Title

      ECS Transactions

      Volume: 86 Pages: 29-35

    • DOI

      10.1149/08614.0029ecst

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Influence of Molar Ratio of CaO to TiO2 on Ti Electrodeposition in Molten CaCl22018

    • Author(s)
      Okada Haruka、Murata Maito、Morishige Taiki、Takenaka Toshihide
    • Journal Title

      ECS Transactions

      Volume: 86 Pages: 117-122

    • DOI

      10.1149/08614.0117ecst

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Presentation] Ca2SiO4を添加した溶融CaCl2中での液体金属Si電析2021

    • Author(s)
      髙橋興世, 森重大樹, 竹中俊英
    • Organizer
      日本金属学会2021年秋期講演大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 1450 ℃で Ca2SiO4を添加した溶融 CaCl2中での Si 電析2021

    • Author(s)
      髙橋興世, 森重大樹, 竹中俊英
    • Organizer
      第53回溶融塩化学討論会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 1450℃ で Ca2SiO4を添加した溶融 CaCl2中での Si 電析2021

    • Author(s)
      髙橋興世, 森重大樹, 竹中俊英
    • Organizer
      資源・素材学会 関西支部第18回「若手研究者・学生のための研究発表会」
    • Related Report
      2021 Annual Research Report
  • [Presentation] CaO/SiO2モル比=1.8化合物を添加した溶融CaCl2中でのSi電析2021

    • Author(s)
      髙橋興世, 森重大樹, 竹中俊英
    • Organizer
      鉄鋼プロセス研究会・材料化学研究会令和3年度学生発表会
    • Related Report
      2021 Annual Research Report
  • [Presentation] CaO/SiO2モル比=1.8, 2.2化合物を添加した溶融CaCl2中でのSi電析2021

    • Author(s)
      髙橋興世, 森重大樹, 竹中俊英
    • Organizer
      日本金属学会2022年春期(第170回)講演大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Ca-Al-O化合物を添加した溶融CaCl2中の液体Al電析2020

    • Author(s)
      岩井裕太、森重大樹、竹中俊英
    • Organizer
      第52回溶融塩科学討論会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Al Electrodeposition in Molten CaCl2 with Various Calcium Alumina2020

    • Author(s)
      Iwai Yuta、Morishige Taiki、Takenaka Toshihide
    • Organizer
      PRiME2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Influence of bath composition on Ti metal deposition in molten CaCl2 containing calcium titanate2019

    • Author(s)
      Toshihide Takenaka, Haruka Okada, Ryoya Shimokawa, Taiki Morishige
    • Organizer
      The 14th World Conference on Titanium (Ti-2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Influence of CaO/SiO2 ratio on Si electrodeposition in molten CaCl22019

    • Author(s)
      Ryoya Shimokawa, Haruka Okada, Taiki Morishige, Toshihide Takenaka
    • Organizer
      11th international symposium on Molten Salts chemistry and Technology
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 溶融CaCl2へのCa-Al-O化合物の溶解とAl電解還元2019

    • Author(s)
      岩井裕太, 森重大樹, 竹中俊英
    • Organizer
      第51回溶融塩化学討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 1400℃以上での溶融CaCl2中でのSi電析2019

    • Author(s)
      下川諒哉, 森重大樹, 竹中俊英
    • Organizer
      第51回溶融塩化学討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 溶融CaCl2中でのCaO/SiO2比がSi電析に及ぼす影響2019

    • Author(s)
      下川諒哉, 岡田晏佳, 森重大樹, 竹中俊英
    • Organizer
      電気化学学会第86大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 溶融CaCl2-CaO-TiO2浴の組成とTi電析の関係2018

    • Author(s)
      岡田晏佳, 村田舞人, 森重大樹, 竹中俊英
    • Organizer
      第163回金属学会秋季講演大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 溶融CaCl2中でのCaSiO3の溶解とMo陰極へのSi電析2018

    • Author(s)
      下川諒哉, 岡田晏佳, 森重大樹, 竹中俊英
    • Organizer
      第163回金属学会秋季講演大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Electrodeposition of Si in molten CaCl2 above 1300K2018

    • Author(s)
      Toshihide Takenaka, Ryoya Shimokawa, Haruka Okada, Taiki Morishige
    • Organizer
      AiMES 2018 ECS and SMEQ Joint International Meeting
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Influence of Molar Ratio of CaO to TiO2 on Ti Electrodeposition in Molten CaCl22018

    • Author(s)
      Haruka Okada, Maito Murata, Taiki Morishige, Toshihide Takenaka
    • Organizer
      AiMES 2018 ECS and SMEQ Joint International Meeting
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 種々のCaO/TiO2比のチタン酸カルシウムを添加した溶融CaCl2中でのTi還元挙動2018

    • Author(s)
      岡田晏佳, 村田舞人, 森重大樹, 竹中俊英
    • Organizer
      第50回溶融塩化学討論会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 溶融CaCl2中でのCaSiO3の溶解とSi電析2018

    • Author(s)
      下川諒哉, 岡田晏佳, 森重大樹, 竹中俊英
    • Organizer
      第50回溶融塩化学討論会
    • Related Report
      2018 Annual Research Report

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Published: 2018-04-23   Modified: 2023-01-30  

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