For future missions to the moon — especially if we want to send a crew there for a significant period of time — we’ll need to find a way to provide for essential needs. Bringing a whole lot of water and oxygen along on a rocket isn’t practical because it’s so heavy, so a different approach aims to make use of the resources available on the moon to create what’s needed.
Now, future lunar explorers may be able to create water and oxygen from moon dust, using research from the European Space Agency (ESA) and others. A team has found a way to produce both water and oxygen by baking dusty lunar soil, which is called regolith.
To create essential resources, first, the regolith is vaporized along with hydrogen and methane by heating it to 1,800 degrees Fahrenheit, turning it directly from solid to a gas. The gases are piped to a converter and condenser to extract the water, and then oxygen can be extracted using electrolysis. The process creates by-products of methane and hydrogen, which can then be recycled to start the process again.
“Our experiments show that the rig is scalable and can operate in an almost completely self-sustained closed loop, without the need for human intervention and without getting clogged up,” said Prof Michèle Lavagna, of the Politecnico Milano, who led the experiments.
Currently, the system has only been tested in the lab. The next step is to actually build the technology which could be used in practice by astronauts and to perfect details like the temperatures and the duration of different phases of the process. Eventually, this could form the basis of a human base on the moon.
“The capability of having efficient water and oxygen production facilities on-site is fundamental for human exploration and to run high quality science directly on the Moon,” said Lavagna. “These laboratory experiments have deepened our understanding of each step in the process. It is not the end of the story, but it’s very a good starting point.”
The research was presented at the Europlanet Science Congress 2021.
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