Chemical Engineering - Mass Transfer - Discussion

2. 

Acetone is to be removed from air in an isothermal dilute absorber using pure water as solvent. The incoming air contains 5 mole% of acetone (yin = 0.05). The design equation to be used for obtaining the number of trays (N) of the absorber is, N+2 = 6 log (yin/yout).For 98% recovery of acetone, the number of trays required is/are

[A]. 1
[B]. 8
[C]. 9
[D]. 10

Answer: Option C

Explanation:

No answer description available for this question.

Sai said: (Jan 27, 2019)  
Can anyone explain the answer?

Vishal said: (Feb 24, 2019)  
Y-out = (2/100) * (5/100),
= 0.001.

N = 6 * log(0.05/0.001)-2,
= 9.

Urvish Makwana said: (Nov 16, 2019)  
The answer will be 8 not 9 By the above calculation which is correctly calculated.

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