Thanks much!!! An absorption column is ot be designed to recover 99.5% of the NH

Question

Thanks much!!!

An absorption column is ot be designed to recover 99.5% of the NH3 from a feed stream, which is supplied at 72 degrees F and an NH3 partial pressure of 10mmHg. The feed stream contrains 2100lb/hr of ait. The column operates at 1.0atm, is supplied with pure water at 72degress F that flows at 1.5 times the minumum water rate. H(height of the transfer unit) is 1.9ft.

a) find the minumum water rate, in lb/hr.

b) find the height of the packing required if ? =1.0 (? is the drift correction factor and can be derived from the equation ? = (1-yi)-(1-y)/ ln(1-yi/1-y)

equilibrium relationship for NH3 is x

Thanks much!!! An absorption column is ot be designed to recover 99.5% of the NH3 from a feed stream, which is supplied at 72 degrees F and an NH3 partial pressure of 10mmHg. The feed stream contrains 2100lb/hr of ait. The column operates at 1.0atm, is supplied with pure water at 72degress F that flows at 1.5 times the minumum water rate. H(height of the transfer unit) is 1.9ft. a) find the minumum water rate, in lb/hr. b) find the height of the packing required if ? =1.0 (? is the drift correction factor and can be derived from the equation ? = (1-yi)-(1-y)/ ln(1-yi/1-y) equilibrium relationship for NH3 is x

Explanation / Answer

NH3 mass fraction in feed stream = 10/(760-10) = 0.01333

in exit feed stream , Nh3 mass fraction = 0.0067

now i need the equilibrium values for making of equilibrium line. If you have the equilibrium data..please post. I can also tell steps by which you can solve this quetion very easily.

Steps --

mass balance = 2100 ( 0.01333 - 0.0067 ) = Ls ( X -0)

need equilibrum data to calculate X then Ls can be calculated.

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