Rebreather World - View Single Post - Chemistry and Physics in sealed part-used scrubbers

Duncan Price · 19th September 2007, 06:53

Quote: (Originally Posted by Sutty)

1. How long will this process take? -is it too slow to matter?

2. Will an evenly part-used scrubber behave differently from a scrubber which has normal uneven use?

Anyone got any answers?

1. The kinetics are unfavourable - there will possibly be some redistribution on a local scale around particles of sorb but not throughout the whole bed. The equilibrium position is pretty much in favour of CaCO3 hanging onto the CO2 as well.

2. The effective contact times will be different. An unevenly used scrubber can be modelled as a smaller scrubber whereas the other case is basically a the same sized scrubber that you started out with but with a less efficient absorbant.

19th September 2007, 06:53	#3 (permalink)
Duncan Price Sump Monster Current Rebreather/s: Not Bought Yet Other Rebreather/s: Not Bought Yet Join Date: Feb 2005 Location: Wells, Somerset, UK Posts: 337	Re: Chemistry and Physics in sealed part-used scrubbers Quote: (Originally Posted by Sutty) 1. How long will this process take? -is it too slow to matter? 2. Will an evenly part-used scrubber behave differently from a scrubber which has normal uneven use? Anyone got any answers? 1. The kinetics are unfavourable - there will possibly be some redistribution on a local scale around particles of sorb but not throughout the whole bed. The equilibrium position is pretty much in favour of CaCO3 hanging onto the CO2 as well. 2. The effective contact times will be different. An unevenly used scrubber can be modelled as a smaller scrubber whereas the other case is basically a the same sized scrubber that you started out with but with a less efficient absorbant.
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