Hydraulic Performance Modifications of a Zeolite Membrane after an Alkaline Treatment: Contribution of Polar and Apolar Surface Tension Components

Table 1

Evaluation of the hydraulic permeability from pure water filtration tests performed before and after an alkaline treatment.

Membrane	calcination	Hydraulic permeability	Nature of the treatment	Hydraulic permeability	Ratio
	(°C)	()		()
M1	300		Na2CO3—6.6 mM		0.67
M2	300 & 400		Na2CO3—6.6 mM		0.86
M3	400		Na2CO3—6.6 mM		0.76
M4	500		NaOH—0.1 mM		0.90
M5	400		Na2CO3—6.6 mM		0.61
Tests performed after two acid HCl—12 mM/base treatments for M3
M3	400		Na2CO3—6.6 mM		0.56
M3	400		Na2CO3—6.6 mM		0.78