Tohoku Univ. Technology : Carbon dioxide fixation method : T20-1059_T23-099
Contributing to carbon neutrality through CO2 fixation technology using Ca/Mg-containing wastes as raw materials! Related patents (1/2)
The CO2 fixation technologies so far typically employ alkaline earth metals to fix CO2 by converting it into chemically stable carbonate minerals. However, the conventional technologies are difficult to apply on a large scale because of its slow reaction rate, high cost and potential environmental concerns due to the use of a large amount of pH adjusters. This invention discloses a novel CO2 fixation process that enables to run under 100°C and ambient pressure without using large amounts of pH adjusters. It can run continuously at low cost by regenerating and recycling of the chelating agent (e.g., GLDA) solution within the process. This invention also enables the production of high-purity carbonates, such as CaCO3, and oxides, such as silica, by using Ca/Mg-containing wastes, including combustion ash, waste concrete, and slag, as Ca/Mg sources. The chemicals obtained in this sustainable CO2 fixation technology, such as CaCO3, are expected to be used in industries such as pigments, rubber, and desiccants.
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The revenue generated from technology transfer is reinvested as new research funding for universities and researchers, and is utilized to create further research outcomes. To ensure the smooth operation of this cycle, known as the "Intellectual Creation Cycle," we will vigorously promote technology transfer. The types of seeds we handle include patents, know-how, databases, and programs. We have established a collaborative framework by signing basic technology transfer agreements with the following universities (as of June 1, 2025): Tohoku University, Hirosaki University, Iwate University, Akita University, Fukushima University, Yamagata University, Tohoku Gakuin University, Iwate Medical University, Fukushima Medical University, Aizu University, Miyagi University, Hokkaido University, Muroran Institute of Technology, and Showa Medical University.
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