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Mass Transfer Coefficient

 

Mass Transfer Coefficient Formula

K=˙mtAΔFc     (Mass Transfer Coefficient)

˙mt=KAΔFc

A=˙mtΔFcK

ΔFc=KA˙mt

Symbol English Metric
K = Mass Transfer Coefficient dimensionless dimensionless
˙mt = Mass Transfer Rate lbm/sec kg/s
A = Effective Mass Transfer Area ft2 m2
ΔFc = Driving Force Concentration Differential lbf N
Mass transfer coefficient, abbreviated as K, a dimensionless number, is a porportional constant to the difference in the concentrations and the rate of mass transfer.  It is a parameter used in the field of mass transfer, which refers to the transport of mass from one phase to another.  It is a measure of the effectiveness of mass transfer between two phases, typically a gas and a liquid or a solid and a liquid.
 
In different mass transfer processes, such as diffusion, convection, or both, the mass transfer coefficient can be determined by experimental methods or calculated using empirical correlations or theoretical models.  The value of the mass transfer coefficient depends on several factors, including the properties of the phases involved (such as density and viscosity), the nature of the mass being transferred (such as its diffusivity), the geometry of the system, and the operating conditions (such as temperature and pressure).

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