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    Home»Tech News»How to make moon dust into oxygen
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    How to make moon dust into oxygen

    The Daily FuseBy The Daily FuseJanuary 24, 2025No Comments6 Mins Read
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    How to make moon dust into oxygen
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    Chris Baraniuk

    Expertise Reporter

    Sierra Space Three Sierra Space engineers work on a machine designed to produce oxygen from a substitute for moon dustSierra House

    Sierra House is engaged on a tool designed to provide oxygen in moon-like circumstances

    Inside a large sphere, the engineers pored over their gear. Earlier than them stood a silvery metallic contraption swathed in vibrant wires – a field that they hope will at some point make oxygen on the moon.

    As soon as the staff vacated the sphere, the experiment started. The box-like machine was now ingesting small portions of a dusty regolith – a combination of mud and sharp grit with a chemical composition mimicking actual lunar soil.

    Quickly, that regolith was gloop. A layer of it heated to temperatures above 1,650C. And, with the addition of some reactants, oxygen-containing molecules started to bubble out.

    “We’ve examined all the pieces we are able to on Earth now,” says Brant White, a program supervisor at Sierra House, a non-public firm. “The subsequent step goes to the moon.”

    Sierra House’s experiment unfolded at Nasa’s Johnson House Middle this summer time. It’s removed from the one such know-how that researchers are engaged on, as they develop methods that would provide astronauts residing on a future lunar base.

    These astronauts will want oxygen to breathe but additionally to make rocket gasoline for spacecraft that may launch from the moon and head to locations additional afield – together with Mars.

    Lunar base inhabitants may also require metallic and so they may even harvest this from the dusty gray particles that litters the lunar floor.

    A lot will depend on whether or not we are able to construct reactors in a position to extract such sources successfully or not.

    “It may save billions of {dollars} from mission prices,” says Mr White as he explains that the choice – bringing a number of oxygen and spare metallic to the moon from Earth – could be arduous and costly.

    Sierra Space A machine sits inside a spherical chamber that provides moon-like conditionsSierra House

    The chamber recreates pressures and temperatures of the moon

    Fortunately, the lunar regolith is stuffed with metallic oxides. However whereas the science of extracting oxygen from metallic oxides, for instance, is properly understood on Earth, doing this on the moon is way tougher. Not least due to the circumstances.

    The large spherical chamber that hosted Sierra House’s assessments in July and August this yr induced a vacuum and likewise simulated lunar temperatures and pressures.

    The corporate says it has had to enhance how the machine works over time in order that it might higher deal with the extraordinarily jagged, abrasive texture of the regolith itself. “It will get in all places, wears out all types of mechanisms,” says Mr White.

    And the one, essential, factor you can’t check on Earth and even in orbit round our planet, is lunar gravity – which is roughly one sixth that of the Earth. It won’t be till 2028 or later that Sierra House can check its system on the moon, utilizing actual regolith in low gravity circumstances.

    NASA An artist's impression of two Nasa astronauts on the moonNASA

    Nasa’s Artemis mission plans to land astronauts on the moon in 2027

    The moon’s gravity could possibly be an actual downside for some oxygen-extracting applied sciences until engineers design for it, says Paul Burke at Johns Hopkins College.

    In April, he and colleagues published a paper detailing the outcomes of pc simulations that confirmed how a distinct oxygen-extracting course of is likely to be hindered by the moon’s comparatively feeble gravitational pull. The method underneath investigation right here was molten regolith electrolysis, which includes utilizing electrical energy to separate lunar minerals containing oxygen, with a view to extract the oxygen instantly.

    The issue is that such know-how works by forming bubbles of oxygen on the floor of electrodes deep inside the molten regolith itself. “It’s the consistency of, say, honey. It is vitally, very viscous,” says Dr Burke.

    “These bubbles aren’t going to rise as quick – and may very well be delayed from detaching from the electrodes.”

    There could possibly be methods round this. One could possibly be to vibrate the oxygen-making machine gadget, which could jiggle the bubbles free.

    And additional-smooth electrodes would possibly make it simpler for the oxygen bubbles to detach. Dr Burke and his colleagues at the moment are engaged on concepts like this.

    Sierra House’s know-how, a carbothermal course of, is totally different. Of their case, when oxygen-containing bubbles kind within the regolith, they achieve this freely, relatively than on the floor of an electrode. It means there may be much less likelihood of them getting caught, says Mr White.

    Stressing the worth of oxygen for future lunar expeditions, Dr Burke estimates that, per day, an astronaut would require the quantity of oxygen contained in roughly two or three kilograms of regolith, relying on that astronaut’s health and exercise ranges.

    Nonetheless, a lunar base’s life assist methods would probably recycle oxygen breathed out by astronauts. If that’s the case, it wouldn’t be essential to course of fairly as a lot regolith simply to maintain the lunar residents alive.

    The actual use case for oxygen-extracting applied sciences, provides Dr Burke, is in offering the oxidiser for rocket fuels, which may allow bold house exploration.

    MIT and Shaan Jagani Palak Patel, a PhD student at the Massachusetts Institute of TechnologyMIT and Shaan Jagani

    Palak Patel has been engaged on methods to extract oxygen and metallic from lunar mud

    Clearly the extra sources that may be made on the moon the higher.

    Sierra House’s system does require the addition of some carbon, although the agency says it might recycle most of this after every oxygen-producing cycle.

    Together with colleagues, Palak Patel, a PhD scholar on the Massachusetts Institute of Expertise, got here up with an experimental molten regolith electrolysis system, for extracting oxygen and metallic from the lunar soil.

    “We’re actually it from the standpoint of, ‘Let’s attempt to minimise the variety of resupply missions’,” she says.

    When designing their system, Ms Patel and her colleagues addressed the issue described by Dr Burke: that low gravity may impede the detachment of oxygen bubbles that kind on electrodes. To counter this, they used a “sonicator”, which blasts the bubbles with sound waves with a view to dislodge them.

    Ms Patel says that future resource-extracting machines on the moon may derive iron, titanium or lithium from regolith, for instance. These supplies would possibly assist lunar-dwelling astronauts make 3D-printed spare components for his or her moon base or substitute parts for broken spacecraft.

    The usefulness of lunar regolith doesn’t cease there. Ms Patel notes that, in separate experiments, she has melted simulated regolith into a troublesome, darkish, glass-like materials.

    She and colleagues labored out how you can flip this substance into robust, hole bricks, which could possibly be helpful for constructing constructions on the moon – an imposing black monolith, say. Why not?

    Extra Expertise of Enterprise



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