Use of pervaporation systems in the chemical industry

Comparison of pervaporation models with simulation of hybrid separation processes

“…To ensure high flux and effective separation, operation temperatures should be as high as possible bound by the long term temperature durability of the membrane; thus only a limited temperature drop is allowed regarding a single membrane unit. Retentate stream is reheated after each pervaporation unit by heat exchangers [21]. The applied membrane area per unit should be limited to a size that ensures an acceptable temperature drop.…”

“…In case of alcohol dehydration, pervaporation is more efficient in that range of feed concentration where distillation is very inefficient, while at higher feed water concentrations distillation is the more reasonable choice. Therefore in certain cases the combination of them in a hybrid process can be the most economical option [17,21]. For adequate design and operation, proper modelling of the pervaporation process is inevitable.…”

The potential of polymers of intrinsic microporosity (PIMs) and PIM/graphene composites for pervaporation membranes

“…The use of PV processes for industrial applications has increased steadily over recent decades, with initial applications being explored as early as 1958 by Binning et al [12,13] and patents being published in the 1960s by Binning et al [14] and Loeb et al [15], then being further developed in the years afterwards [6,16,17]. During that time it was noted that the fluxes obtained from the membranes then available were too low to be economically viable for industrial use [18].…”

High performance dual-layer hollow fiber fabricated via novel immiscibility induced phase separation (I2PS) process for dehydration of ethanol

“…Thus, pervaporation membranes with a balance of hydrophilic and hydrophobic characters are strongly preferred. The first commercial pervaporation membrane was developed by Gesellschaft für Trenntechnik (GFT) which utilized a composite membrane configuration whereby a thin layer of crosslinked PVA was coated on a porous poly(acrylonitrile) (PAN) support cast on a non-woven fabric [13]. This membrane configuration allows the effective separation to occur at the thin selective layer.…”