• marduk@lemmy.sdf.org
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    9 hours ago

    I heard it’s nitrogen, which I think releases co² during the production process. You’re right though, could be worse; they could’ve used hypergolic thrusters.

    • Catoblepas@lemmy.blahaj.zone
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      9 hours ago

      Do you mean nitrous (N2O)? Straight up N2 shouldn’t be changing to CO2 unless some very interesting chemistry is happening, haha.

        • xthexder@l.sw0.com
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          8 hours ago

          I’m pretty sure the “production” process is just compressing atmospheric air and separating out the other gases. The atmosphere is 78% nitrogen.

          • I_am_10_squirrels@beehaw.org
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            6 hours ago

            It takes a lot of energy to compress a gas, and more energy to cool it so you can separate the nitrogen. Energy production typically (not always) releases co2.

      • CheetahHybrid @pawb.social
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        8 hours ago

        I think what they mean is that when making liquid CO2 you use a cryo-cooler. That cooler condenses the gas out of the air. Air contains CO2 and nitrogen (plus some other stuff). The gases aren’t created but rather just a state change. Cryo coolers also take energy to run.