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I'm having a bit of difficulty with a packed tower problem I'm working on. Not too sure how things work around here so I'll just jump straight in...

The problem is;

A packed column continuously recovers acetone (component A) from air by absorption with water at 60 deg. F. The air contains 3 mole% acetone, where 97% recovery is desired. The gas flow rate is 50 ft^3/min at 60 deg. F, 1 atm. The maximum allowed gas superficial velocity in the column is 2.4 ft/sec.

>> I can assume that in the range of operation, Y* = 1.75X, where Y and X are mole ratios (acetone to pure carrier).

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My question is;

How would I go about determining the minimum water-to-air flow rate ratio? I know I have to start by finding the maximum acetone concentration possible in the aqueous solution but I'm having an absolute mare trying to figure this out.

Any help on this would be greatly appreciated.

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# Packed tower problem (gas-liquid absorption)

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