Taiyo Nippon Sanso Corporation (Head Office: Shinagawa-ku, Tokyo; President: Kenji Nagata; hereinafter “the Company”), a Japanese industrial gas business company within the Nippon Sanso Holdings Group, today announced that it has entered into a partnership with Toho Gas Co., Ltd. (Head Office: Nagoya, Aichi; President: Satoshi Yamazaki; hereinafter “Toho Gas”) to develop an integrated CO₂ capture system that combines the CO₂ separation and recovery technologies of both companies. Through this partnership, the companies aim to enable the capture of CO₂ from low-concentration sources that have traditionally been difficult to address, thereby expanding CO₂ capture solutions applicable to a broader range of emission sources.

News Release PDF


1. Overview
　Under this collaboration, the companies will combine Toho Gas’s membrane separation system, which concentrates low-concentration CO₂ to a medium concentration (approximately 20–40%), with the Company’s proven PSA (Pressure Swing Adsorption)-based CO₂ capture system, which recovers highpurity CO₂ from medium-concentration CO₂. By integrating these technologies, the companies aim to commercialize a system capable of capturing high-purity CO₂ even from feed gas with lower CO₂ concentrations than previously feasible, specifically in the range of 5% to 20%.

2. Background of the Partnership
　The Company has previously commercialized PSA-based CO₂ capture system for emission sources such as lime kilns (CO₂ concentration: 20–40%)¹, and has since expanded the applicable feed CO₂ concentration range to 20–60%², thereby providing solutions that support industrial decarbonization efforts. Following these developments, the Company has received numerous inquiries from customers whose emission sources contain less than 20% CO₂, leading to growing demand for new systems capable of handling lowerconcentration exhaust gases.
　Meanwhile, Toho Gas has been developing membrane separation systems—including membrane modules and associated equipment such as peripheral and pretreatment units—capable of concentrating low-concentration CO₂ contained in sources such as boiler exhaust gas to a medium concentration of 20–40%.
　Under this partnership, a two-stage process will be established in which low-concentration CO₂ (approximately 5–20%) is first efficiently concentrated to a medium level (approximately 20–40%) using Toho Gas’s membrane separation system, followed by the recovery of high-purity CO₂ from the mediumconcentration CO₂ using the Company’s PSA-based CO₂ capture system.

Notes:
1. News release dated March 31, 2023: “CO₂ Recovery Equipment with Capacity for 10 Tons Per Day to
be Launched in April.”
2. News release dated April 17, 2024: “Extended Range of Raw Material CO₂ Concentrations Applicable
to CO₂ Recovery Equipment.”

3. Future Outlook
　Through its collaboration with Toho Gas, the Company aims to develop a new CO₂ capture system applicable to a wide range of emission sources with CO₂ concentrations from 5% to 60%. In addition, the Company will conduct performance verification under actual operating conditions and collect operational data, with the goal of accelerating the practical implementation of CO₂ capture systems for lowconcentration exhaust gases.
　Leveraging its long-standing expertise and track record as an industrial gas manufacturer, the Company will continue to propose optimal CO₂ capture systems tailored to customers’ emission characteristics and contribute to the realization of a carbon-neutral society.

4. Products
Membrane Separation System (Toho Gas products under development)
A membrane separation system designed to concentrate low-concentration CO₂ to 20–40%.

Taiyo Nippon Sanso Corporation
Tnsc.Info@jp.nipponsanso.com