GS Yuasa Corporation (Tokyo Stock Exchange: 6674; “GS Yuasa”) today announced that, towards achieving carbon neutrality, in a joint research project with Hokkaido University , it has developed an innovative CO₂ separation and capture technology utilizing electrodialysis, and commenced operation of a small-scale demonstration unit for a CO₂ separation and capture system applying this technology (hereinafter, "the Technology") in July.

The Technology features high energy efficiency realized by adopting GS Yuasa's unique pH swing mechanism*1, enables recovery of CO2 gas at a high concentration of over 99%, and boasts a low environmental impact. The demonstration unit that recently commenced operation has increased its CO2 processing capacity to 1 kg/day. In the next step, we aim to scale up the demonstration unit to expand its processing capacity to the 1 ton/day level.

Conventional CO2 separation and capture technologies have primarily been employed at large-scale plants such as thermal power stations. However, by utilizing the Technology and leveraging its low environmental impact, it becomes possible to efficiently separate and capture CO2 even at relatively small-scale facilities like food factories and breweries, thereby expecting broader adoption across various sites. Furthermore, the recovered high-concentration CO2 gas can not only be stored underground but also be reused for various applications, such as energy sources or chemical raw materials. Moreover, its application is anticipated for CO2 separation and capture in special environments, including space and marine settings.

Details of the Technology were already presented at the  2025 The Electrochemical Society of Japan Fall Meeting*2 (held on September 5, 2025), and are scheduled to be presented at the 248th ECS Meeting*3 (held on October 13, 2025) in October.

Moving forward, GS Yuasa will continue to contribute to the creation of a carbon recycling society through the development of CO2 separation and capture technologies.

*1 A mechanism that electrochemically controls pH utilizing electrodialysis technology.
*2 Organized by The Electrochemical Society of Japan, co-organized by Tottori University, and held at Tottori University. The event features symposium presentations, general academic presentations, and corporate exhibitions.
*3 Organized by The Electrochemical Society, and held at Hilton Chicago, Chicago, Illinois, USA. The event features oral presentations, poster sessions, panel discussions, and corporate exhibitions.