Pervaporative separation of ethanol from an alcohol—ester quaternary mixture

Berendsen, W.R.; Radmer, Pia; Reuß, Matthias

doi:10.1016/j.memsci.2006.02.029

Cited by 20 publications

(6 citation statements)

References 24 publications

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“…In order to explain this, it has to be notice that the activation energy of pervaporation is the sum of the activation energy of diffusion (E D,i ) and the enthalpy of sorption (DH s,i ) [30], E a,i = E D,i + DH s,i . E D,i is generally positive and DH s,i is usually negative for the exothermic sorption process [31].…”

Section: Membrane Performance Based On Permeance and Selectivitymentioning

confidence: 99%

The driving force as key element to evaluate the pervaporation performance of multicomponent mixtures

Luis

Bruggen

2015

Separation and Purification Technology

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Section: Membrane Performance Based On Permeance and Selectivitymentioning

confidence: 99%

The driving force as key element to evaluate the pervaporation performance of multicomponent mixtures

Luis

Bruggen

2015

Separation and Purification Technology

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“…8 The success of PV generally depends upon the fabrication of a suitable membrane that acts as an effective barrier between liquid and vapor phases, with the mass transfer occurring selectively across the membrane towards the downstream vapor side. The component with the smallest weight fraction in the mixture gets preferentially permeated across the membrane.…”

Section: Introductionmentioning

confidence: 99%

Novel sodium alginate/polyethyleneimine polyion complex membranes for pervaporation dehydration at the azeotropic composition of various alcohols

Devi¹,

Smitha²,

Sridhar³

et al. 2007

J of Chemical Tech & Biotech

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Dense polyion complex membranes of anionic sodium alginate (NaAlg) and cationic polyethyleneimine (PEI) were prepareand crosslinked with glutaraldehyde for dehydration of alcohol-water mixtures by pervaporation (PV). The membranes were characterized by ion-exchange capacity measurement, Fourier transform infrared spectroscopy, differential scanning calorimetry and scanning electron microscopy to investigate the extent of cross-linking, intermolecular interactions, thermal stability, and surface and crosssectional morphologies, respectively. Wide-angle X-ray diffraction was used to investigate the crystallinity of the membranes. PV dehydration characteristics of the membranes were determined as a function of PEI content, crosslinking time as well as feed water composition. Transport parameters such as sorption, diffusion and permeability of water and alcohols through the membranes were determined. Among the four different membrane compositions, the polyion complex containing 40% PEI was found to yield optimum separation data in terms of membrane stability, selectivity and permeability. On the other hand, 10% PEI-containing membrane gave the highest selectivity with the lowest flux at ambient temperature, but the membranes were not sufficiently stable.

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“…If the variation of partial flux against feed to permeate side pressure differential at a constant temperature and fixed downstream pressure is linear, flow coupling and plasticization may be considered to be negligible. In this case, each component permeates for its own driving force [34]. In Fig.…”

Section: Resultsmentioning

confidence: 99%

Sorption and permeation of acetic acid–water mixtures by pervaporation using copolymer membrane

Kuila¹,

Ray²

2012

Polymer Engineering & Sci

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Poly (acrylonitrile‐co‐methyl acrylate) copolymer designated as PANMA was used for making pervaporation membrane. This membrane was used for separation of acetic acid–water mixtures over the concentration range of 80–99.5 wt% acetic acid in water. Interaction parameters based on Flory–Huggins lattice model and engaged species induced clustering (ENSIC) model was used to explain swelling of the membranes. Coupling in sorption was explained in terms of activity coefficient of water and acid in feed and membrane using Flory–Huggins model and also by interpolating ENSIC parameters. Flow coupling in pervaporation was also determined from phenomenological deviation coefficients. Intrinsic membrane properties like partial permeability and membrane selectivity of the solvents were also determined. Diffusion coefficient and plasticization coefficient of the solvents were obtained using a modified solution–diffusion model. The copolymer membrane showed high flux and water selectivity for highly concentrated acid. Thus, at 30°C temperature 1–20 wt% water in feed was concentrated to 82–84 wt% water in permeate and for 0.95 wt% water in feed, the membrane showed thickness normalized flux and water selectivity of 1.71 kg m−2 h−1 mμ and 409, respectively. OLYM. ENG. SCI., 2013. © 2012 Society of Plastics Engineers

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Pervaporative separation of ethanol from an alcohol—ester quaternary mixture

Cited by 20 publications

References 24 publications

The driving force as key element to evaluate the pervaporation performance of multicomponent mixtures

The driving force as key element to evaluate the pervaporation performance of multicomponent mixtures

Novel sodium alginate/polyethyleneimine polyion complex membranes for pervaporation dehydration at the azeotropic composition of various alcohols

Sorption and permeation of acetic acid–water mixtures by pervaporation using copolymer membrane

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