Pervaporation separation index

The permeation and separation characteristics of PVA-g-AN membranes toward acetic acid-water mixtures were expressed as permeation rate (flux) (0, separation factor (a) and pervaporation separation index (PSI). 

Pervaporation separation index (PSI), which is a measure of the separation ability of a membrane was defined by Huang and Yeom [7] and expressed as the product of separation factor and permeation rate. 

Fig. 7. Change of pervaporation separation index with feed composition (T = 30 °C).

Pervaporation separation index values were calculated using Eq. (3) and presented in Fig. 7. As it is reflected from... 

The pervaporation separation index (PSI) indicates the overall productivity of PV membrane ... 

In a distinct vein, BC/chitosan membranes have been tested for pervaporative separation of binary aqueous-organic mixtures (ethanol/water) [111]. The substantially high pervaporative separation index (350 kg. x.m. h 0 and low activation energy (10 kj.mol ) are indicative of the high potential of BC/chitosan membranes in the pervaporative separation of ethanol/water azeotrope. Targeting to mimic the intrinsic antimicrobial properties of chitosan on BC nanofibrils, nanostructured BC nanocomposite membranes were obtained by surface functionalization with aminoalkyl groups (Figure 2.14) [114]. These bioactive nanostructured membranes also presented improved mechanical and thermal properties and may be useful for biomedical applications. 

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