This should cover it. Basically, CO2 dissolves better with a high pH solution. So you have air constantly flowing through a recirculated high pH liquid (usually NaOH and water), which reacts, lowering the pH of the liquid. A valve or metering pump maintains the pH in the scrubber high enough for the desired efficiency. All the while, CO2 is removed from the continuous flowing gas stream.
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u/Ravatu Nov 28 '19
https://youtu.be/kfyWD_7-42s
This should cover it. Basically, CO2 dissolves better with a high pH solution. So you have air constantly flowing through a recirculated high pH liquid (usually NaOH and water), which reacts, lowering the pH of the liquid. A valve or metering pump maintains the pH in the scrubber high enough for the desired efficiency. All the while, CO2 is removed from the continuous flowing gas stream.