Development of inorganic solids for carbon dioxide capture in the air at room temperature using ceramics with layered structures

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K05222
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 36010:Inorganic compounds and inorganic materials chemistry-related
• Research Institution: Saitama University
• Principal Investigator: YANASE Ikuo 埼玉大学, 理工学研究科, 准教授 (10334153)
• Co-Investigator(Kenkyū-buntansha): 武田 博明 埼玉大学, 理工学研究科, 教授 (00324971) ; 小玉 翔平 埼玉大学, 理工学研究科, 助教 (30910096)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 脱炭素 / カーボンニュートラル / DAC / 二酸化炭素回収 / 無機固体 / 水蒸気

Outline of Final Research Achievements

Sodium titanate was synthesized to investigate the properties of water vapor adsorption and carbon dioxide absorption in the air at room temperature. As a result, it was found that sodium titanate has very high water vapor and carbon dioxide absorption properties not found in other sodium titanium oxides. In addition, it was confirmed that sodium titanate releases absorbed carbon dioxide and regenerates itself. Thus, it was clarified that sodium titanate can be a DAC material that can repeatedly absorb and desorb carbon dioxide in the air.

Free Research Field

無機材料化学

Academic Significance and Societal Importance of the Research Achievements

カーボンニュートラルの実現に必要な技術の一つである、大気中の希薄な二酸化炭素の回収材料を見出すことに成功し、今後の無機固体による二酸化炭素回収材料の設計指針に貢献できると期待される。無機固体である本材料は、大気中の水蒸気を活用することで、希薄な二酸化炭素の回収に優れており、種々の詳細な基礎データの蓄積にも成功しており、学術的意義も高い。