Experimental investigation, modeling and scale-up of hydrophilic vapor permeation membranes: Separation of azeotropic dimethyl carbonate/methanol mixtures

Holtbruegge, Johannes; Wierschem, Matthias; Steinruecken, Simon; Voß, Dorothea; Parhomenko, Lubow; Lutze, Philip

doi:10.1016/j.seppur.2013.08.025

Cited by 41 publications

(19 citation statements)

References 51 publications

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“…An influence of the degree of polymer crosslinking on the permeability and selectivity was already observed by other authors e.g. by Holtbrügge et al [41] for vapour permeation processes with polyvinyl alcohol membrane Pervap TM 1255…”

Section: Influence Of the Swelling Behaviour On The Permeate Fluxessupporting

confidence: 66%

Experimental Investigation of Pervaporation Membranes for Biobutanol Separation

Lutze¹

2013

J. Memb. Separ. Tech.

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Biotechnological production of chemical building blocks is one important step towards a more sustainable production. Unfortunately, the products to be separated are often highly diluted. Pervaporation has received increasing attention for the separation of small amounts of organic compounds from aqueous solutions, especially in the separation of butanol from water or from fermentation broth. To evaluate the potential of pervaporation for biobutanol recovery a consistent database is required, describing the dependency of permeate fluxes and selectivities on process variables like temperature, permeate pressure as well as feed concentrations and compositions. Therefore, within this work we investigated the separation behaviour of a commercially available polydimethylsiloxane (PDMS) membrane and membranes based on poly(ether block amide) (PEBA) fabricated in our own laboratory. The membranes were tested under varying operating conditions. Fermentation by-products or impurities may affect the pervaporation separation performance. Therefore, in addition, the permeate fluxes and the influence of acetone, ethanol, acetic and butyric acid and 1,3-propanediol have been investigated in detail as well. Several differences in the permeability and selectivity of PDMS and PEBA were observed during the experimental study. Swelling experiments were applied to further analyse the separation behaviour of PDMS and PEBA more in detail. Finally the influence of the observed separation performances on the overall butanol pervaporation process is discussed. It was found that especially well permeating byproducts like acetone can drastically influence the subsequent downstreaming process.

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Section: Influence Of the Swelling Behaviour On The Permeate Fluxessupporting

confidence: 66%

Experimental Investigation of Pervaporation Membranes for Biobutanol Separation

Lutze¹

2013

J. Memb. Separ. Tech.

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“…5); methanol-DMC azeotropic mixture exists in transesterification, as indicated by their common narrow boiling points [74]. Therefore, solvents that break the binary azeotrope are essential to easily separate final products and achieve high GC yields [83]. The relative volatility of the binary azeotrope formed by methanol-DMC can be altered by using a suitable azeotropic agent; as such, eliminating the azeotrope facilitates the separation of methanol from DMC [84].…”

Section: Effects Of Glycerol/dmc Molar Ratiomentioning

confidence: 99%

Review on recent progress in catalytic carboxylation and acetylation of glycerol as a byproduct of biodiesel production

Okoye

Hameed

2016

Renewable and Sustainable Energy Reviews

191

117

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“…To achieve separation, a membrane which is more permeable for one of the azeotropic species than it is for the other is used . These methods, however, have been challenged by several factors including those associated with scaling up the separation units, high investment cost and rapid fouling of the membranes which restrict their application in the industrial field …”

Section: Introductionmentioning

confidence: 99%

Separation of azeotropic mixtures using air microbubbles generated by fluidic oscillation

et al. 2015

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The feasibility of separating the azeotropic mixture of ethanol-water using microbubble-mediated batch distillation is presented. The effects of the depth of the liquid mixture in the bubble tank and of the inlet air microbubble temperature on the process efficiency were investigated. The enrichment of ethanol in the vapor phase was higher than that achieved at equilibrium conditions for all liquid ethanol mole fractions considered, including the azeotrope. On decreasing the depth of the liquid mixture and increasing the temperature of the air microbubbles, the separation efficiency of ethanol was improved. Ethanol with purity of about 98.2 vol % was obtained using the lowest liquid level (3 mm) in conjunction with the highest air microbubble temperature (908C). Separation was achieved with a small rise in the temperature of the liquid mixture (48C) at a depth of 3 mm and evaporation time of 90 min making this system suitable for treating thermally sensitive mixtures.

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Experimental investigation, modeling and scale-up of hydrophilic vapor permeation membranes: Separation of azeotropic dimethyl carbonate/methanol mixtures

Cited by 41 publications

References 51 publications

Experimental Investigation of Pervaporation Membranes for Biobutanol Separation

Experimental Investigation of Pervaporation Membranes for Biobutanol Separation

Review on recent progress in catalytic carboxylation and acetylation of glycerol as a byproduct of biodiesel production

Separation of azeotropic mixtures using air microbubbles generated by fluidic oscillation

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