Mass Transfer Coefficient. Chemical engineering questions and answers. Mass transfer coefficient m s kg h mass 2 a.
If we consider the one dimensional flux of oxygen across an air water interface then we may define a mass transfer coefficient for the gas phase kg as. It can be shown in a relatively straightforward manner that in typical mass transfer problems the sherwood number depends on two important groups. Differential equation km differential equation below an example of a sensorgram generated with the differential equations from above.
The mass transfer coefficient is a proportionality constant that relates the molar flux units of moles per unit time per unit area to the molar concentration driving force.
It has the general form of 2 it should be noted that many different definitions of the mass transfer coefficient exists. Is known as the dimensionless water. It can be shown in a relatively straightforward manner that in typical mass transfer problems the sherwood number depends on two important groups. Is a fictitious partial pressure in equilibrium with the concentration in the bulk fluidalthough the choice between writing the mass transfer coefficient in terms of the liquid side or the gas side is arbitrary the most common method is to write it in terms of the side with the most resistance to mass transfer.