Fabrica de oxigen pe Marte a MIT se potrivește acum cu producția unui copac mic Imprimare
International
Luni, 05 Septembrie 2022 10:52

                                  Artist's concept of the Perseverance rover, which has the Mars Oxygen In-Situ Resource Utilization Experiment aboard

     If humans are to one day survive and thrive on Mars, ready access to breathable oxygen will be a necessity, and an interesting technology is beginning to show exciting promise on this front. MIT's Moxie experiment was shipped to the Red Planet aboard the Perseverance rover for the purposes of producing oxygen using CO2, and after a year of testing, has been found to do so reliably at day or night, and across the seasons.
The lunchbox-sized Moxie, which standards for Mars Oxygen In-Situ Resource Utilization Experiment, traveled to Mars aboard the Perseverance rover in 2020. After touching down in the Jezero crater in February of 2021, the unit was soon put to work and around two months later produced its first oxygen, around 5.4 grams (0.2 oz) of the stuff.
Moxie does this by drawing in air from the planet's carbon-rich atmosphere, passing it through a filter to remove contaminants, compressing it and then heating it up. At this point, a solid oxide electrolyzer electrochemically splits the carbon dioxide into carbon monoxide and oxygen ions. These ions are then isolated and recombined to form molecular oxygen, or breathable O2.
Because Moxie is just one of a number of scientific experiments aboard the Perseverance rover, scientists are unable to run it continuously. Instead, they run it for about an hour each time, with the team conducting seven experiments throughout 2021 to test it out in differing scenarios. This meant firing it up in varying atmospheric conditions during the day and night, and in different Martian seasons.

In each of these experiments, Moxie reliably produced its target output of six grams (0.21 oz) of oxygen. The MIT scientists point out this is around the same oxygen produced by a modest tree on Earth, and in demonstrating that Moxie can achieve this on a reliable basis, in varying conditions, they believe they've taken an important step toward larger systems that can sustain a human population.

“This is the first demonstration of actually using resources on the surface of another planetary body, and transforming them chemically into something that would be useful for a human mission,” says Moxie deputy principal investigator Jeffrey Hoffman. “It’s historic in that sense.”

 

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*__Source: MIT