Using pervaporation data in the calculation of vapour permeation hollow-fibre modules for aroma recovery

Abstract

-Taking into account the close similarity between pervaporation and vapour permeation techniques, a method for employing pervaporation flux data in the modelling of vapour permeation modules is proposed. It is based on the use of fugacity gradients across the membrane, instead of concentration ones, as the driving force for mass transfer. This procedure is interesting, for instance, in the case of aroma recovery systems, for which there is much more experimental data on pervaporation available in the literature than on vapour permeation. In order to illustrate the application of this method, pervaporation experiments for an isotropic PDMS membrane were conducted with aqueous solutions of ethyl acetate (113-2474 mg/L), and the results obtained were used to enable simulation of different vapour permeation hollow-fibre modules for recovering ethyl acetate from diluted air streams.

Pervaporative recovery of volatile aroma compounds from fruit juices

“…Since aroma concentrations in the feed solutions are low, membrane plasticization does not usually play an important role and, accordingly, the permeate flux of aroma components is generally a linear function of their concentration [124,129,137,143,146,148,152,153,[160][161][162]166,[179][180][181][182][183][184]186,187], in accordance with Eq. (9).…”

“…As shown in Fig. 4, polydimethylsiloxane (PDMS) is by far the most used material in the available literature studies on aroma recovery by pervaporation [86,103,[125][126][127][128][129][130][131][132][133][134][135][137][138][139][140][141][142][143][144][145][146][149][150][151][152][153][154][155][158][159][160]162,163,167,168,[171][172][173][174][175][176][177][180][181][182][187][188]...…”

Comparison among various configurations of hybrid distillation–membrane setups for the energy efficiency improvement of bioethanol distillery: a simulation study

“…For the vapor permeation‐based membrane process, the flux and separation factor can be calculated by replacing activity coefficient with fugacity coefficient ( ϕ ) in Eqn (3). The resultant Eqn (8) is given as follows 33 : …”

Influence of inorganic salt on the effectiveness of liquid mixtures separation by pervaporation☆

“…Such behavior of the PDMS hydrophobic membranes in contact with water-organic mixtures is typical for that kind of pervaporation systems. In general, for a given membrane, its selectivity is dependent on the kind of the organic component and increases with increasing hydrophobicity of organic component [9,[25][26][27][34][35][36][37][38]. Table 1.…”