NASA’s Carbothermal Reduction Demonstration (CaRD) completed integrated prototype testing on 7 August 2025 and confirmed production of carbon monoxide using concentrated solar energy, mirrors, control software, and a carbothermal reactor aimed at simulated lunar regolith. NASA’s published summary says the system could use only lunar materials and sunlight if deployed on the Moon, and a NASA technical report states the test on 28 August 2025 extracted 0.195 grams of oxygen in carbon-monoxide form using 0.380 kWh of solar energy arriving at the primary mirror, for 0.51 g/kWh.
This is a structural breakthrough for lunar habitation because oxygen is the largest consumable for both breathing and propellant, and the process can, in principle, close a local oxygen loop at the Moon’s south pole. The same downstream chemistry can support methane production from carbon monoxide and hydrogen, which directly links habitat survival, mobility, and ascent logistics; NASA also notes the approach is relevant to Mars because the carbon-monoxide-to-oxygen and carbon-monoxide-to-methane chemistry can be adapted there.
The Ark team should track CaRD scale-up, reactor autonomy, regolith feed handling, thermal efficiency, and vacuum durability, then compare this carbothermal route against alternative lunar oxygen paths such as electrolysis and ilmenite reduction. Priority integration targets are: oxygen storage, carbon recycling, sunlight concentration hardware, and fail-safe reactor isolation for multi-year unattended operation in polar shadow-edge environments.