Matheson invests in ASU to supply oxygen for US direct air capture plant


US-based Matheson has entered into a gas supply agreement with carbon reduction specialist 1PointFive to provide oxygen for the company’s first direct air capture (DAC) plant in Texas, United States.

The US operating arm of industrial gases giant Nippon Sanso Holdings Corporation (NSHD), Matheson will build an air separation unit (ASU) to supply much need oxygen to 1PointFive’s ‘Stratos’ DAC plant.

Oxygen is used in the DAC process to produce a pure stream of carbon dioxide (CO2), which is then permanently stored in underground geologic reservoirs.

Expected to begin operations in mid-2025, Stratos aims to capture up to 500,000 tonnes of CO2 per year when fully operational, becoming the world’s biggest DAC plant.

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