Liquid Phase Mass Transfer Coefficient by Two Film Theory Solution

STEP 0: Pre-Calculation Summary
Formula Used
Overall Liquid Phase Mass Transfer Coefficient = 1/((1/(Gas Phase Mass Transfer Coefficient*Henry's Constant))+(1/Liquid Phase Mass Transfer Coefficient))
Kx = 1/((1/(ky*H))+(1/kx))
This formula uses 4 Variables
Variables Used
Overall Liquid Phase Mass Transfer Coefficient - (Measured in Mole per Second Square Meter) - The Overall Liquid Phase Mass Transfer Coefficient accounts for overall driving force for both the phases in contact in terms of Liquid Phase Mass transfer.
Gas Phase Mass Transfer Coefficient - (Measured in Mole per Second Square Meter) - Gas phase mass transfer coefficient is a diffusion rate constant that relates the mass transfer rate, mass transfer area, and concentration change as driving force.
Henry's Constant - Henry's Constant states that the amount of dissolved gas in a liquid is proportional to its partial pressure above the liquid.
Liquid Phase Mass Transfer Coefficient - (Measured in Mole per Second Square Meter) - The Liquid Phase Mass Transfer Coefficient accounts for driving force for mass transfer in the liquid film in contact with the Gas Phase.
STEP 1: Convert Input(s) to Base Unit
Gas Phase Mass Transfer Coefficient: 90 Mole per Second Square Meter --> 90 Mole per Second Square Meter No Conversion Required
Henry's Constant: 0.016 --> No Conversion Required
Liquid Phase Mass Transfer Coefficient: 9.2 Mole per Second Square Meter --> 9.2 Mole per Second Square Meter No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Kx = 1/((1/(ky*H))+(1/kx)) --> 1/((1/(90*0.016))+(1/9.2))
Evaluating ... ...
Kx = 1.24511278195489
STEP 3: Convert Result to Output's Unit
1.24511278195489 Mole per Second Square Meter --> No Conversion Required
FINAL ANSWER
1.24511278195489 1.245113 Mole per Second Square Meter <-- Overall Liquid Phase Mass Transfer Coefficient
(Calculation completed in 00.004 seconds)

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DJ Sanghvi College of Engineering (DJSCE), Mumbai
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Mass Transfer Theories Calculators

Liquid Phase Mass Transfer Coefficient by Two Film Theory
​ LaTeX ​ Go Overall Liquid Phase Mass Transfer Coefficient = 1/((1/(Gas Phase Mass Transfer Coefficient*Henry's Constant))+(1/Liquid Phase Mass Transfer Coefficient))
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​ LaTeX ​ Go Average Convective Mass Transfer Coefficient = 2*sqrt(Diffusion Coefficient (DAB)/(pi*Average Contact Time))
Mass Transfer Coefficient by Surface Renewal Theory
​ LaTeX ​ Go Convective Mass Transfer Coefficient = sqrt(Diffusion Coefficient (DAB)*Surface Renewal Rate)
Mass Transfer Coefficient by Film Theory
​ LaTeX ​ Go Convective Mass Transfer Coefficient = Diffusion Coefficient (DAB)/Film Thickness

Important Formulas in Mass Transfer Coefficient, Driving Force and Theories Calculators

Convective Mass Transfer Coefficient
​ LaTeX ​ Go Convective Mass Transfer Coefficient = Mass Flux of Diffusion Component A/(Mass Concentration of Component A in Mixture 1-Mass Concentration of Component A in Mixture 2)
Average Sherwood Number of Combined Laminar and Turbulent Flow
​ LaTeX ​ Go Average Sherwood Number = ((0.037*(Reynolds Number^0.8))-871)*(Schmidt Number^0.333)
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​ LaTeX ​ Go Average Sherwood Number = 0.023*(Reynolds Number^0.83)*(Schmidt Number^0.44)
Average Sherwood Number of Flat Plate Turbulent Flow
​ LaTeX ​ Go Average Sherwood Number = 0.037*(Reynolds Number^0.8)

Liquid Phase Mass Transfer Coefficient by Two Film Theory Formula

​LaTeX ​Go
Overall Liquid Phase Mass Transfer Coefficient = 1/((1/(Gas Phase Mass Transfer Coefficient*Henry's Constant))+(1/Liquid Phase Mass Transfer Coefficient))
Kx = 1/((1/(ky*H))+(1/kx))

What is Two-Film Theory ?

The two-film theory of Whitman (1923) was the first serious attempt to represent conditions occurring when material is transferred in a steady state process from one fluid stream to another. In this approach, it is assumed that a laminar layer exists in each of the two fluids. Outside the laminar layer, turbulent eddies supplement the action caused by the random movement of the molecules, and the resistance to transfer becomes progressively smaller.

How to Calculate Liquid Phase Mass Transfer Coefficient by Two Film Theory?

Liquid Phase Mass Transfer Coefficient by Two Film Theory calculator uses Overall Liquid Phase Mass Transfer Coefficient = 1/((1/(Gas Phase Mass Transfer Coefficient*Henry's Constant))+(1/Liquid Phase Mass Transfer Coefficient)) to calculate the Overall Liquid Phase Mass Transfer Coefficient, The Liquid Phase Mass Transfer Coefficient by Two Film Theory formula is defined as the formula to relate the individual film coefficients with the overall mass transfer coefficients accounting for overall mass transfer driving force. Overall Liquid Phase Mass Transfer Coefficient is denoted by Kx symbol.

How to calculate Liquid Phase Mass Transfer Coefficient by Two Film Theory using this online calculator? To use this online calculator for Liquid Phase Mass Transfer Coefficient by Two Film Theory, enter Gas Phase Mass Transfer Coefficient (ky), Henry's Constant (H) & Liquid Phase Mass Transfer Coefficient (kx) and hit the calculate button. Here is how the Liquid Phase Mass Transfer Coefficient by Two Film Theory calculation can be explained with given input values -> 2.245193 = 1/((1/(90*0.016))+(1/9.2)).

FAQ

What is Liquid Phase Mass Transfer Coefficient by Two Film Theory?
The Liquid Phase Mass Transfer Coefficient by Two Film Theory formula is defined as the formula to relate the individual film coefficients with the overall mass transfer coefficients accounting for overall mass transfer driving force and is represented as Kx = 1/((1/(ky*H))+(1/kx)) or Overall Liquid Phase Mass Transfer Coefficient = 1/((1/(Gas Phase Mass Transfer Coefficient*Henry's Constant))+(1/Liquid Phase Mass Transfer Coefficient)). Gas phase mass transfer coefficient is a diffusion rate constant that relates the mass transfer rate, mass transfer area, and concentration change as driving force, Henry's Constant states that the amount of dissolved gas in a liquid is proportional to its partial pressure above the liquid & The Liquid Phase Mass Transfer Coefficient accounts for driving force for mass transfer in the liquid film in contact with the Gas Phase.
How to calculate Liquid Phase Mass Transfer Coefficient by Two Film Theory?
The Liquid Phase Mass Transfer Coefficient by Two Film Theory formula is defined as the formula to relate the individual film coefficients with the overall mass transfer coefficients accounting for overall mass transfer driving force is calculated using Overall Liquid Phase Mass Transfer Coefficient = 1/((1/(Gas Phase Mass Transfer Coefficient*Henry's Constant))+(1/Liquid Phase Mass Transfer Coefficient)). To calculate Liquid Phase Mass Transfer Coefficient by Two Film Theory, you need Gas Phase Mass Transfer Coefficient (ky), Henry's Constant (H) & Liquid Phase Mass Transfer Coefficient (kx). With our tool, you need to enter the respective value for Gas Phase Mass Transfer Coefficient, Henry's Constant & Liquid Phase Mass Transfer Coefficient and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
How many ways are there to calculate Overall Liquid Phase Mass Transfer Coefficient?
In this formula, Overall Liquid Phase Mass Transfer Coefficient uses Gas Phase Mass Transfer Coefficient, Henry's Constant & Liquid Phase Mass Transfer Coefficient. We can use 2 other way(s) to calculate the same, which is/are as follows -
  • Overall Liquid Phase Mass Transfer Coefficient = Liquid Phase Mass Transfer Coefficient*Fractional Resistance Offered by Liquid Phase
  • Overall Liquid Phase Mass Transfer Coefficient = Liquid Phase Mass Transfer Coefficient*Fractional Resistance Offered by Liquid Phase
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