91������ Light Metal Company, Ltd.
Nikkei MC Aluminium Co., Ltd.
91������ Sanso Corporation

Toward Achieving a Carbon-Neutral Society
―Demonstration of CO2 Separation and Capture from Flue Gas of Secondary Aluminum Alloy Melting Process―

　91������ Light Metal Company, Ltd. (Headquarters: Minato-ku, Tokyo; President: Shuichi Asakuno; hereinafter “91������ Light Metal”), Nikkei MC Aluminium Co., Ltd. (Headquarters: Minato-ku, Tokyo; President: Masashi Koyama; hereinafter “Nikkei MC Aluminium”), and 91������ Sanso Corporation (Headquarters: Shinagawa-ku, Tokyo; President: Kenji Nagata; hereinafter “91������ Sanso”), a Japanese industrial gas business company in the 91������ Sanso Holdings Group, announce their successful demonstration of CO2 separation and capture from flue gas of a large-scale secondary aluminum alloy melting furnace.

1. Background of the demonstration
　Currently, reducing CO2 emissions from various aluminum industrial furnaces poses a critical challenge for decarbonization, and the development of technologies to separate and capture CO2 from flue gas is required as a solution to this challenge. Against this backdrop, focusing on large-scale secondary aluminum alloy melting furnaces, a joint demonstration was recently conducted by 91������ Sanso, 91������ Light Metal, and Nikkei MC Aluminium using the CO2 capture system that 91������ Sanso began selling in April 2023 (a system developed to capture CO2 from lime kilns, targeting new non-fossil CO2 sources).

2. Overview and results of the demonstration
　91������ Light Metal and Nikkei MC Aluminium diverted a portion of the flue gas from a large-scale secondary aluminum alloy melting furnace currently in commercial operation to a CO2 capture system developed by 91������ Sanso. This CO2 separation and capture test project successfully demonstrated the separation, capture, and produced a concentrated CO₂ stream with a purity of up to 97.6%.
　Through this demonstration, the three companies confirmed that CO2 can be separated and captured continuously using a CO2 capture system even while a large-scale secondary aluminum alloy melting furnace is in continuous commercial operation. The demonstration also yielded valuable insights toward commercialization of this system, regarding non-CO₂ flue-gas constituents present in the flue gas generated from aluminum scrap melting, which is indispensable for achieving carbon neutrality.
　91������ Light Metal will incorporate the findings of this demonstration into the basic design of various hazardous and contaminant / catalyst poison removal processes, while advancing the development of technologies for efficient and economically viable capture of CO2 emitted from various industrial furnaces used in the aluminum industry.

3. Roles of each company in the demonstration

　91������ Sanso will continue to conduct research and development on CO2 separation and capture technologies for a wide range of industrial furnaces in order to reduce CO2 emissions from those furnaces, both in Japan and overseas, and contribute to the realization of a carbon-neutral society.
　91������ Light Metal and Nikkei MC Aluminium will continue to advance research and development toward carbon neutrality, not only through this highly efficient CO2 separation and capture technology but also through the oxygen-enriched combustion technologies announced earlier.

[Reference: Press release]
　Effort toward Oxygen-Enriched Combustion Technology in the Aluminum Melting Process―Demonstration of CO2 Emissions Reduction by Up to 24.1% Compared to Conventional Air Combustion―
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[Reference: Website of each company]
91������ Light Metal Company Ltd.:
Nikkei MC Aluminium Co., Ltd.:
91������ Sanso Corporation:

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Toward Achieving a Carbon-Neutral Society―Demonstration of CO2 Separation and Capture from Flue Gas of Secondary Aluminum Alloy Melting Process― (PDF)