Two main groups of membranes
Classification of pressure driven membrane processes
Structuring membrane processes
Not pressure driven membrane processes
Different modes of driving force generation
Reverse Osmosis & Osmosis Difference
Concentration- and Temperature Polarization in Pervaporation
Flat sheet fabrication
Hollow fiber spinning process
Dense membranes
Structure- and Permeation realated Propertes of Membranes
MWCO = Molocular Weight Cut Off
Microfiltration
The bubble point method
The bubble point method is a characterization method for determining the [pore size destribution] of [microfiltration] membranes. By increasing the pressure on the [gas side] , bubbles form in the [liquid phase] . The first bubble forms at the [largest pores] of the membrane. The physical equation describing the increase of pressure required to remove the [liquid phase] in the pore is called the [Young-Laplace] equation.
Methods for pore size destribution:
Bubble point method, Permeability method, Flow rate vs pressure
Characterization of dense membranes
Solution-Diffusion model of a dense membrane
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