Mitsubishi Heavy Industries, the City of Yokohama and Tokyo Gas Co are to work together, as well as with MHI Group company MHI Environmental & Chemical Engineering Co, to demonstrate an experiment to capture carbon dioxide from a municipal waste-to-energy plant and use it in the synthesis of e-methane.

The launch of the demonstration comes after a memorandum of understanding was signed in 2022, and it is the first such project in Japan, using the flue gas from the Tsurumi waste-to-energy plant in Yokohama. Separation of the CO₂ is performed by MHI technology. The captured carbon dioxide will be transported to the Tokyo Gas Yokohama Techno Station and used in methanation (powered by 100% renewable energy), although the partners hope to explore other means of utilisation of the CO₂ in the future.

It is not clear from the press release what volume of CO₂ will be captured.