Making oxygen and carbon monoxide
Facts checked 1 Nov 2026
Two later steps need gases you can't extract on Adalia Academy: the acid loop needs Oxygen, and making iron needs Carbon Monoxide. One process makes both from Carbon Dioxide, and it's your first chance to choose a primary output on purpose.
The recipe
The process is called Carbon Dioxide Ferrocatalysis. For every 11 kg of Carbon Dioxide, it makes 7 kg of Carbon Monoxide and 4 kg of Oxygen.
Choose Oxygen as the primary output
You need about 570 tonnes of Oxygen for the acid loop, and about 365 tonnes of Carbon Monoxide for making iron. Oxygen is the one you need in full, so make it the primary output. The Carbon Monoxide then comes out as a by-product, and with your Scientist's 62.5% you still get more than you need.
- In: About 1,570 tonnes of Carbon Dioxide.
- Out: About 570 tonnes of Oxygen (primary) and 620 tonnes of Carbon Monoxide (by-product).
Run it alongside weathering
This job takes about 26 hours on one refinery, but almost all of that is running time, not set-up. So splitting it really pays: run it on two refineries at once and it takes about 13 hours; on three, about 9.
Start it while your Olivine is weathering. That's why the Training Ground asks you to extract about 1,600 tonnes of Carbon Dioxide on top of what weathering needs. Later, the acid loop gives back more Carbon Dioxide than you used here, which you can sell.
Start the job
- Select an Academy refinery and click Refine Materials.
- Choose Carbon Dioxide Ferrocatalysis, with your crew's warehouse for the inputs and outputs.
- Select Oxygen as the primary output.
- Set the amount, check the Processing Time, click Lease & Begin, and approve.
To split the job, start a second one on another refinery with the rest of the Carbon Dioxide.