A novel carbon dioxide capture technology from the atmosphere using inexpensive and safe carbon dioxide absorption materials.
Nanotechnology (Saitama University Research Seed Collection 2025-25 p.105)
Keywords: Carbon dioxide separation and recovery, carbon dioxide emission reduction, effective utilization of carbon dioxide.
In order to achieve carbon neutrality, research and development of carbon dioxide capture technology, which is considered one of the factors contributing to global warming, is progressing. Chemical adsorption methods are one of the capture technologies, and the conventional method of chemical absorption of carbon dioxide using amine compounds has been limited in application due to issues such as volatility, toxicity, and corrosiveness unique to organic compounds. In our laboratory, we have discovered that materials made from unprecedentedly inexpensive raw materials (sodium, iron, oxygen) can separate and capture carbon dioxide from mixed gases in the atmosphere over a wide temperature range and at various concentrations. Currently, we are working on improving the absorption rate of carbon dioxide, developing regeneration technology, and promoting the effective utilization of captured carbon dioxide. Additionally, we have successfully identified novel inorganic solid oxides that possess superior functionality for capturing carbon dioxide from the atmosphere compared to sodium ferrite, and we are advancing the development of new materials that are optimal for the application environment of carbon dioxide absorption materials.
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Ikko Yanase, Associate Professor Graduate School of Science and Engineering, Department of Materials Science, Fundamental Materials Area 【Recent Research Themes】 ● Development of carbon dioxide capture materials utilizing ion exchange phenomena ● Development of ceramic materials for sodium-ion secondary batteries
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【Appeal Points to Industry】 ● Research and development of materials for absorbing carbon dioxide from the atmosphere ● Excellent carbon dioxide separation and recovery capabilities over a wide temperature range (room temperature to 600°C) ● Excellent carbon dioxide separation and recovery capabilities over a wide concentration range (0.04% to 100%) ● Patent Application 2016-3156 (Method for producing α-sodium ferrite; Applicant: Saitama University) ● Representative published paper: Journal of CO2 Utilization, 2018, 24, 200-209 【Examples of Practical Applications】 ● (Application Example) Direct contribution to carbon neutrality through the removal of carbon dioxide from the atmosphere ● (Application Example) High purity of gases through the removal of trace carbon dioxide ● (Application Example) Separation and recovery of carbon dioxide from factory exhaust gases using inorganic solids
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Electron microscope image of sodium ferrite.
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The Saitama University Open Innovation Center is a center that functions as a liaison office for industry-academia-government collaboration. It consists of three departments: the Industry-Academia-Government Collaboration Department, the Intellectual Property Department, and the Startup Support Department, each staffed with coordinators well-versed in various fields. The center's activities include solving technical challenges in companies, supporting the implementation of joint research, and conducting technology transfer aimed at introducing and utilizing Saitama University's intellectual property.
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