[PSUBS-MAILIST] A question on rebreathers and scrubbers

["Ryan Johnson" <tree_of_life_@hotmail.com>]

I have been doing a lot of searching trying to find out how rebreathers and 
scrubbers work??? I have found that many companies use a product called 
sofnolime

The primary constituents of soda lime include Calcium Hydroxide - Ca(OH)2 
(about 70-80%), Water - H2O (about 16 to 20%), Sodium Hydroxide - NaOH 
(about 1-2%), and Potassium Hydroxide - KOH (about >0-1%).

How different is this product from lime combined with water (Ca(OH)2 + CO2 = 
CaCO3 + H2O)

I realize that there is no NaOH in the second but I can't find a reason for 
needing it to be there...

Can anyone help me with this or point me in hte right direction.

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