How is sodium peroxide used to produce oxygen in submarines?

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raouf

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raouf asked the Naked Scientists:
   
How is sodium peroxide used to produce oxygen in submarines?

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« Last Edit: 02/11/2011 19:30:02 by _system »

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Offline damocles

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How is sodium peroxide used to produce oxygen in submarines?
« Reply #1 on: 02/11/2011 23:26:46 »
It can react with carbon dioxide in the presence of water:

sodium peroxide + carbon dioxide + water → sodium bicarbonate + oxygen

2 Na2O2             + 4 CO2           + 2 H2O   → 4 NaHCO3             + O2

(This assumes a huge excess of carbon dioxide; sodium carbonate or sodium hydroxide are alternative products that might form if less carbon dioxide were available, or other acids might get into the action if present.)


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