Simulation of the temperature-driven pervaporation of dilute 1-butanol aqueous mixtures through a PTMSP membrane in a cross-flow module

Modeling of transport and separation in a thermopervaporation process

“…Although the transport in the membrane systems with an air gap is described in several papers [13,21], in the theoretical part we shortly present the derivation of these equations which we subsequently used in our calculations.…”

“…Therefore we roughly estimated the thickness of the boundary layer, l, from the relation for the rectangular channel [13]:…”

“…Borisov et al [13] used the temperature and concentration resistance model to model temperature and concentration profiles during air gap thermopervaporation experiments with plate-andframe membrane module. Transport of water-butanol binary mixture through dense poly(1-trimethylsilyl-1-propyne) (PTMSP) membrane was described by a mentioned model.…”

“…In this technique transport and separation through membranes occur due to the difference in chemical potentials between both sides of the membrane [1,2]. Difference in chemical potentials in pervaporation can be created by applying low pressure on the permeate side -vacuum pervaporation (VPV) [1][2][3][4][5][6][7], by using a sweeping gas stream on the permeate side -sweeping gas pervaporation (SGPV) [8][9][10] or by creating a temperature difference between feed and permeate -thermopervaporation (TPV) [11][12][13][14][15][16][17]. Vacuum pervaporation is the method most widely described in the literature among all mentioned pervaporation modes.…”

Sorption‐assisted thermopervaporation method for organics recovery from ABE fermentation broth

“…CO 2 or H 2 ) leads to increase in the pressure in the low‐pressure compartment, resulting in additional mass‐transfer resistance to water and organic vapour transport before their condensation in the cold trap installed outside the membrane module . This problem can be overcome by using the thermally driven process of thermopervaporation (TPV), where the reverse of the membrane and vapour‐condensing surface are in the same membrane module and divided by a thin air gap . Due to this fact, it is possible to achieve the same level of fluxes and separation factors as in the pervaporation process, but at atmospheric pressure and permeate condensation temperatures of 0–15 °C .…”