The hydrogen was produced by Protium’s 40kg per day Pioneer 1 facility in South Wales, and has begun replacing the volumes of grey hydrogen used by Oxccu’s OX1 facility at London Oxford Airport.

Commissioned in 2024, the OX1 plant is testing the start-up’s SAF production technology, slated to simplify the traditional multi-stage SAF production pathway, which the firm claims will reduce complexity, losses, and carbon intensity.

The plant currently has capacity to produce 1.2 litres of fuel per day.

The process can convert either separate streams of hydrogen and biogenic carbon dioxide or hydrogen-rich syngas into SAF using a specialist catalyst.

Until Protium’s supplies began arriving, Oxccu had been using grey hydrogen due to a lack of availability and the high costs of green.

“Working with Protium….we continue to focus on reducing the lifecycle emissions of our fuel and reinforcing our commitment to producing SAF with lower carbon intensity,” said Oxccu co-founder and CEO, Andrew Symes.

Protium’s Chief Operating Officer, Jon Constable, said the firm’s supplies were helping to bridge the gap between green hydrogen production and downstream uses like SAF synthesis.

Last September, Oxccu raised £20.75m ($28.5m) in Series B funding to continue scaling its processes.