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I learned some time ago that the Soyuz capsules use hydrogen peroxide as a monopropellant. I'm trying to use this fact for a chemistry question posed to my students, but I cannot find anywhere how much the descent module holds, just that it uses hydrogen peroxide.

What's the propellant mass for the Soyuz descent capsule or what's its tank capacity?

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The Soyuz Crew Operations Manual says the system holds between 29.6 and 31.4 kg of peroxide.

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It also has a nice schematic of the system.

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    $\begingroup$ Beautiful and timely. Thanks for saving my slides! $\endgroup$ Feb 13, 2022 at 21:13

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