Transient Diffusion

Question 1

To find liquid side film coefficients.

Answer 1

1. Draw up an equation for liquid side mass transfer
2. Calculate xai using henrys law given rearranged
3. Calculate kal using rearrangement of flux equation or penetration theory
4. Calculate contact time using L/velocity equation

Question 2

To calculate oxygen mass transfer in a rise bubble

Answer 2

1. To calculate mass transfer per unit volume, calculate your interfacial area per unit volume (6*gas hold/ bubble diameter)
2. Multiply mole flux by this A to find mt per unit volume