POMS Membrane for Selective Separation of Ethanol from Dilute Alcohol-Aqueous Solutions by Pervaporation

Abstract

Lignocellulosic biomass has potential as an alternative to corn as starting material for the production of ethanol for the development of non-fossil fuel energy sources. In this case, low concentration bioethanol is gained by yeast fermentation and it has to be efficiently recovered and concentrated. For this purpose pervaporation separation of dilute alcohol-aqueous solutions was carried out using a poly(octhylmethyl siloxane) [POMS] membrane. The effect of different process parameters (feed composition, feed temperature, feed flow rate, permeate pressure) on pervaporation performance were investigated and discussed in terms of the separation factor and the total flux. The membrane studied was ethanol to water selective at ethanol feed concentrations lower than 2.5% w/w, while the highest permeability was achieved at feed temperature of 95 C.

Platform Molecule Removal from Aqueous Mixture with Organophilic Pervaporation: Experiments and Modelling

“…It can be stated at higher ethanol concentration the separation effectiveness of the organophilic pervaporation membranes are decreased, similar tendency have been already published by Slater et al [25], Lazarova et al [27], Vane [34], Chai et al [35] and Fu et al [36]. Table 2, Table 3 and Table 4 summarize the estimated values of transport coefficients, activation energies, exponential parameters and minimized objective functions of the two models.…”

High-flux PIM-1/PVDF thin film composite membranes for 1-butanol/water pervaporation

“…A number of hydrophobic polymers have been investigated for organophilic pervaporation, including poly(dimethylsiloxane) (PDMS) [9], poly(octylmethyl siloxane) (POMS) [10][11][12], polyvinylidene fluoride (PVDF) [13], polyether-block-polyamide (PEBA) [14], poly(1-trimethylsilyl-1-propyne) (PTMSP) [15] and the polymer of intrinsic microporosity PIM-1 [16][17][18][19]. Inorganic membrane materials such as silicalite-1 [20] have also been employed.…”

Towards continuous industrial bioprocessing with solventogenic and acetogenic clostridia: challenges, progress and perspectives

“…The difference is typically introduced by the application of a vacuum or sweep gas on the permeate side of the membrane [ 305 ]. PDMS (polydimethylsiloxane [ 121 , 305 ], and POMS (polyoctylmethylsilixane [ 156 ], are typical used polymers for the pervaporation membranes. For more information on the membrane material, the reader is pointed to Huang et al [ 111 ].…”