Tohoku University Technology: Electrochemical CO₂ reduction method: T23-091
High-efficiency CO₂ electroreduction under hydrothermal conditions
The electrochemical CO₂ reduction reaction (CO2RR) process, in which CO₂ is electrochemically converted, is attracting attention as a promising CO₂ reduction method. However, the conventional method has a problem of low energy efficiency. The inventor has found that it is possible to improve the efficiency of the CO2RR process by utilizing a high-temperature high-pressure water environment called a hydrothermal conditions. When electrolysis is carried out in high-temperature high-pressure water at 150℃ and 100 atm pressurized with CO₂ , the high diffusion coefficient and solubility of CO₂ in the water facilitating efficient CO₂ supply to the electrode, and the energy efficiency is significantly enhanced. Additional assessment has shown that it is possible to synthesize "carbon-negative" basic chemical product (methanol), in which the amount of CO₂ absorbed exceeds the amount of CO₂ emitted, by leveraging low-temperature waste heat from industrial sources and renewable electricity.
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The revenue generated from technology transfer is reinvested into universities and researchers as new research funding, which is used to create further research outcomes. To ensure the smooth operation of this cycle, known as the "Intellectual Creation Cycle," we will actively promote technology transfer. The types of seeds we handle include patents, know-how, databases, and programs. We have established a collaborative framework by concluding 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 - Showa Medical University
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