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Re: [PSUBS-MAILIST] Idea for homebrew CO2 absorber

Hi Paul - I have no idear if it works or not - but sounds 
good on the first view - I have unfortuntaly not the time 
to test it with a liter H-milk, a plastic bag and a diver 
snorckel and some small pipeing in close cycle - would you 
do it - under control of a friend with a watch ? 

(Before you make any test - please confim that your 
are 18 or older - and if not delete this message 
from your computer..)

If you fall in coma without warning or with a channel view
- it works (out of oxygen) / but if you get heavy headeges 
- it doesn't work (to much CO2). 


Paul B schrieb:
> Hello,
> I am a new member, my name is Paul. I have recently signed up for the
> mailing list. I may one day build a submarine (if I still have the desire
> and the money falls right). Right now I am gathering information and ideas.
> I was wondering if anyone thought of using lime milk ( Ca(OH)2 * H2O ) as
> base for homebrew CO2 absorber. You could use a regular clear plastic bottle
> (like they use for soda) and run something like an aquarium bubbler in it.
> The reaction should follow as this:
> Ca(OH)2 + CO2 -> CaCO3 + H2O
> CaCO3 + H2O + CO2 -> Ca(HCO3)2
> Calcium carbonate ( CaCO3, chalk) is unsoluble.
> Calcium hydrocarbonate ( Ca(HCO3)2 ) IS soluble. So when the reaction goes
> far enough, instead of milky substance you should see clear water — that
> will be a sign to change the absorber.
> The backdraw is that you have to put all your air through the water based
> solution, which will put more moisture in the air.
> Dead lime should be dirt cheap. And if my calculations are correct, 72 grams
> (about 3 and a half oz.) should get you rid of more than 40 liters of CO2 —
> that's 2 hours of one person breathing.
> What do you guys think? Or is this nonsense?
> Sincerely, Paul.
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