Pervaporation study for different binary mixtures in the esterification system of lactic acid with ethanol

Delgado, Patricia; Sanz, Marı́a Teresa; Beltrán, Sagrario

doi:10.1016/j.seppur.2008.08.002

Cited by 39 publications

(31 citation statements)

References 21 publications

(32 reference statements)

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“…The partial pressure (

p_{i}^{S}

) was obtained from the Antoine equation for the saturated vapor pressure. The activity coefficients of the i th component (γ i s) in the liquid phase were calculated with the Universal Quasichemical (UNIQUAC) equation . The permeate pressure is usually very small and may be ignored.…”

Section: Methodsmentioning

confidence: 99%

Poly(ether sulfone) supported hybrid poly(vinyl alcohol)–maleic acid–silicone dioxide membranes for the pervaporation separation of ethanol–water mixtures

Xie

et al. 2017

J of Applied Polymer Sci

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Microporous poly(ether sulfone) (PES) supported hybrid polymer–inorganic membranes were prepared by the crosslinking of poly(vinyl alcohol) (PVA), maleic acid (MA), and SiO2 via an aqueous sol–gel route and a solution‐casting method. The membrane performance was tested for the pervaporation separation of ethanol–water mixtures from 20 to 60 °C with a feed ethanol concentration of 96 wt %. The membrane characterization results reveal that different SiO2 loadings affected the crystallinity and roughness of the membranes. The PVA–MA–SiO2 membrane containing 10 wt % SiO2 showed that SiO2 nanoparticles were well dispersed within the polymer matrix; this resulted in significant enhancements in both the flux and selectivity. The membrane achieved a high water permeability of 1202 g·μm·m−2 h−1 kPa−1 and a selectivity of 1027 for the separation of a 96 wt % ethanol‐containing aqueous solution. This enhanced membrane performance might have been due to the dense crosslinking membrane network, increased free volume, and uniform distribution of SiO2 nanoparticles. Both the water and ethanol fluxes increased with the feed water concentration and temperature. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44839.

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“…The partial pressure (

p_{i}^{S}

Section: Methodsmentioning

confidence: 99%

Poly(ether sulfone) supported hybrid poly(vinyl alcohol)–maleic acid–silicone dioxide membranes for the pervaporation separation of ethanol–water mixtures

Xie

et al. 2017

J of Applied Polymer Sci

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show abstract

“…According to previous kinetic and pervaporation studies [4,7,8], an increase in temperature leads to faster reaction and pervaporation rates. In Fig.…”

Section: Effect Of Reaction and Pervaporation Temperaturementioning

confidence: 79%

“…Quantification by UV detection was made at a wavelength of 210 nm. The GC and HPLC methods have already been described in a previous work [7]. The mean relative deviation for all the components was less than 3% for sample analysis.…”

Section: Sample Analysismentioning

confidence: 93%

“…Experiments on the semi-batch pervaporation membrane reactor have been performed in the same equipment as for the pervaporation studies [7,8]. However in this case, the reactor has 2 L capacity and a frame of four stainless steel mesh catalyst baskets (i.d.…”

Section: Esterification-pervaporation Coupled Equipmentmentioning

confidence: 99%

“…Our group has already studied the kinetics of the reaction using lactic acid aqueous solutions of 20 wt% [4] as well as the pervaporation performance of the membrane PERVAP ® 2201 for some of the binary mixtures involved in the esterification system and for the quaternary mixture [7,8], showing that this membrane presents high selectivity towards water. Based on these previous studies a model has been proposed to describe the integrated esterification-pervaporation process.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Ethyl lactate production via esterification of lactic acid with ethanol combined with pervaporation

Delgado

Sanz

Beltrán

et al. 2010

Chemical Engineering Journal

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Pervaporation Reactor for Enhanced Esterification of Lactic Acid and Isobutyl Alcohol

2019

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The esterification of lactic acid and isobutyl alcohol to isobutyl lactate and water was intensified. An ex situ pervaporation reactor (PVR) shifted the equilibrium towards the formation of isobutyl lactate. The effects of temperature, molar acid/ alcohol ratio, catalyst loading, and ratio of effective membrane area to total reaction volume were investigated with and without a PVR. Lactic acid conversion beyond reaction equilibrium was enhanced with such a reactor. The partial fluxes of the individual components were evaluated for each reaction parameter indicating that the membrane was selective towards separation of water and exhibited a good performance. The performance of the ex situ PVR was studied, which revealed that the water removal rate exceeded the water production rate.

show abstract

Pervaporation study for different binary mixtures in the esterification system of lactic acid with ethanol

Cited by 39 publications

References 21 publications

Poly(ether sulfone) supported hybrid poly(vinyl alcohol)–maleic acid–silicone dioxide membranes for the pervaporation separation of ethanol–water mixtures

Poly(ether sulfone) supported hybrid poly(vinyl alcohol)–maleic acid–silicone dioxide membranes for the pervaporation separation of ethanol–water mixtures

Ethyl lactate production via esterification of lactic acid with ethanol combined with pervaporation

Pervaporation Reactor for Enhanced Esterification of Lactic Acid and Isobutyl Alcohol

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