Kremser Brown equation - Gas absorbers
Kremser Brown equation - Gas absorbers
(OP)
In a simplified version of this equation, we have :
Fraction of solute in exit gas as a ratio to that in the incoming gas = (A-1) / ((A^(N+1)) - 1)
Where the LHS = y2 / y1 in this simplifed form of the KSB equation ( which is valid for low values of y, and low values of the same solute in the feed lean solvent, and absorption is more or less isothermal)
Where y2 = solute mole fraction in exit gas ; y1 = solute mole fraction in incoming gas
A = absorption factor ; N= no of theoretical stages
There is an alternate presentation of this KSB equation which give N explicitly without going through a trial and error calc.
Does some one have the explicit alternate presentation for A? Thanks in advance for sharing.
Fraction of solute in exit gas as a ratio to that in the incoming gas = (A-1) / ((A^(N+1)) - 1)
Where the LHS = y2 / y1 in this simplifed form of the KSB equation ( which is valid for low values of y, and low values of the same solute in the feed lean solvent, and absorption is more or less isothermal)
Where y2 = solute mole fraction in exit gas ; y1 = solute mole fraction in incoming gas
A = absorption factor ; N= no of theoretical stages
There is an alternate presentation of this KSB equation which give N explicitly without going through a trial and error calc.
Does some one have the explicit alternate presentation for A? Thanks in advance for sharing.





RE: Kremser Brown equation - Gas absorbers
http://www.separationprocesses.com/Absorption/GA_C...
http://www.separationprocesses.com/Absorption/Main...
Can you share what is the system in question?
Dejan IVANOVIC
Process Engineer, MSChE
RE: Kremser Brown equation - Gas absorbers
These attachments provide the value of N explicitly, while I am looking for the expression that gives A explicitly.
In a lean oil absorption tower, or a TEG tower, once the value of A is known for a given set of operating conditions (say from a process simulation), it is possible to rate the tower for more trays or less trays and determine the change in exit gas solute concentration.
Getting the value of A for a known set of operating conditions is the reason for this search for an explicit expression for A - it avoids the tiresome trial and error method to get this value.