Skytree has validated its Stratus Alpha prototype, demonstrating an end-to-end Direct Air Capture (DAC) solution that combines atmospheric CO₂ capture with integrated liquefaction. The system, tested at the company’s Almere facility in the Netherlands, successfully produced transportable liquid CO₂ at beverage-grade purity levels of 99.98%.

The process begins with CO₂ captured directly from the air at around 98% gas purity, which is then converted into liquid form. The result surpasses industry requirements set by the Society of Beverage Technologists, which specifies a minimum of 99.9% purity for beverage-grade carbon dioxide.

Liquefaction adds flexibility and efficiency for end users. For sectors such as food and beverage, it ensures access to reliable, decentralised CO₂ supplies. In greenhouses, the ability to store liquid CO₂ for later use enables operation during off-peak electricity hours, reducing energy costs and improving efficiency.

The Stratus Alpha unit has been undergoing continuous testing, generating operational data to refine the technology ahead of its planned commercial launch in 2026. Skytree’s approach aims to deliver a scalable, weather-independent DAC solution with high capture efficiency and stable year-round productivity.