Abstract
This chapter discusses the general study of absorption. The two major types of absorption methods are hydrocarbon absorption and gas absorption. For hydrocarbon absorption, the K values are used to generate the absorption and stripping factors. The Edmister method, using the effective overall absorption and stripping factors, and the Edmister graphs, are very useful for hand calculations. Edmister developed a procedure that provides equations combining absorption and stripping functions. Most often, absorption is gas film controlling if all the resistance to mass transfer is in the gas film. This happens when the gas is soluble in or reactive with the liquid. General equations for mass transfer coefficients are used in conjunction with things such as packing effective interfacial areas and void fractions under operating conditions for the particular packing selected. It is easier to find KGA for the packing used with a specific system than effective interfacial area and operation void fraction.
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