MIT's Plasma Tech Could Turn Mars Into a Refueling Hub

If humanity ever wants to set foot on Mars and then make it back home, we’ll need more than just rockets and helmets. Propellant, life‑support gases, and a reliable way to make them on the Red Planet itself are high on the list of must‑haves.

Enter a group of engineers and plasma‑physics nerds at MIT. Led by PhD candidate Lanie McKinney, the Aerospace Plasma Group is tinkering with a device that, in plain English, turns the thin CO₂‑rich air on Mars into usable oxygen and carbon monoxide. The trick? A “nanosecond repetitively pulsed dielectric barrier discharge” – or NRP‑DBD for short – that creates a cold plasma spark, breaking the stubborn carbon‑oxygen bonds.

Cold plasma sounds fancy, but the idea is surprisingly simple: zap the gas, split it, then quickly pull the oxygen out before it recombines with the carbon monoxide. To do that, McKinney’s team paired the plasma reactor with an oxygen‑selective membrane that acts like a sieve, grabbing oxygen molecules the instant they appear. It’s a bit like catching raindrops the moment they hit the ground – you have to be fast, or they’ll just roll away.

McKinney didn’t get to this point in a vacuum (pun intended). She’s been part of MIT’s Space Resources Workshop for years, throwing herself into NASA challenges that ask, “How do we live sustainably off‑world?” In one competition the team imagined a self‑sufficient, ten‑year Martian outpost. In another, the LunaRecycle Challenge, she co‑led the CERBERUZ team, which devised a way to grind up mixed trash into a powder that can be re‑injected as filament or spare‑part material. That effort snagged a $775,000 prize in Phase 2 – proof that recycling and refueling could go hand‑in‑hand.

The work is still in the lab, and there are plenty of unanswered questions. The plasma environment is harsh, and we don’t yet know how the membrane will hold up after weeks or months of exposure. As McKinney put it in an MIT News interview, “We can perform the conversion step really well, but what happens to the mixture afterward is still a bit of a mystery.” Still, the early results are promising enough that the team is pushing toward a prototype that could one day sit on a Martian surface, humming away while astronauts refuel their ascent vehicles.

Beyond the hardware, McKinney stresses that breakthroughs like this come from mixing disciplines. She’s taken part in MIT’s Space Architecture course, where engineers and architects brainstormed ways to shield lunar habitats using only lunar soil – even sketching out mortar‑free bricks that could be stacked like Lego. “The biggest takeaway,” she says, “is that you need a team with different expertise to solve these problems. Space is the ultimate adventure, and you can’t do it alone.”

All of this ties back to a bigger picture: without in‑situ propellant production, a Mars mission would need to haul tons of fuel from Earth, making it astronomically expensive. As McKinney and her mentors argue, “If we don’t build gas stations on Mars, getting people back to Earth will be very difficult.” The MIT plasma reactor might just be the first pump in that future network of Martian fuel depots.