CO₂ Enrichment Technology Designed to Enable Carbon Circularity at Waste to Energy Plants

Kanadevia Corporation (TOKYO:7004) has been developing High-CO₂-Concentration Waste Incineration Technology since FY2024. The project aims to separate and capture carbon dioxide (CO₂) from flue gas generated during waste incineration. Kanadevia will begin the world's first demonstration of this technology in the Waste to Energy sector at the Shinagawa Incineration Plant in Shinagawa City, Tokyo, in November 2026.

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Conceptual Diagram of the Technology

The demonstration project aims to commercialize an innovative technology for the efficient capture of CO₂ from waste-incineration flue gas. The demonstration facility, which serves as a pilot-scale plant, comprises an incinerator capable of processing 2 tons of waste per day and a CO₂ separation and capture system. By replacing combustion air with oxygen and recirculated flue gas, the technology increases the CO₂ concentration in the flue gas to several times that of conventional waste incineration systems. The project is scheduled to continue through FY2030. The demonstration facility has been installed on the premises of the Shinagawa Incineration Plant.

Currently, CO₂ is not separated and recovered from flue gas at Waste to Energy (WtE) plants. With conventional waste combustion technology, the CO₂ concentration in flue gas is generally limited to approximately 8% to 15%. By raising this concentration to 30% to 60%, the new technology is expected to improve the efficiency of CO₂ separation and capture, regardless of the capture method used. The captured CO₂ can then be liquefied or used as feedstock for methanation, adding a carbon circularity function to WtE plants and enabling them to operate as carbon-neutral carbon circularity plants. Compared with conventional waste combustion technology, the new technology can reduce the volume of flue gas sent to CO₂ separation and capture systems to only a fraction of the conventional level. It is therefore also expected to reduce the space required for CO₂ capture equipment compared with simply adding a CO₂ separation and capture system to a conventional WtE plant.

Laboratory-scale testing has already demonstrated a CO₂ recovery rate of more than 90% and CO₂ purity of more than 95%. The project ultimately aims to achieve a stable capture rate of more than 90% from CO₂-enriched flue gas.

Once commercialized, the technology is expected to add a carbon circularity function to WtE plants. In addition to generating electricity using heat from waste incineration, these facilities would be able to capture CO₂ and use it as a resource or feedstock for fuel.

Overview of the Demonstration Project
Location: Shinagawa Incineration Plant, Clean Authority of TOKYO (Shinagawa City, Tokyo)
Facility Capacity: Incinerator: 2 tons/day
Demonstration Period: November 2026 to March 2028

View source version on businesswire.com: https://www.businesswire.com/news/home/20261021372259/en/

Mikie Okawa
Public Relations Section
Kanadevia Corporation
Tel: +81-6-6569-0076
Email: kouhou@kanadevia.com

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