A maghnite-clay-H/ polymer membrane for separation of ethanol–water azeotrope

Aouinti, L.; Belbachir, Mohammed

doi:10.1016/j.clay.2007.04.014

Cited by 22 publications

(5 citation statements)

References 17 publications

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“…Recently, new membrane technologies, including pervaporation and vapor permeation, have been applied to the task of separating azeotropic mixtures. 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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Section: Introductionmentioning

confidence: 99%

Separation of azeotropic mixtures using air microbubbles generated by fluidic oscillation

et al. 2015

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“…Microfiltration [10][11][12] -In microalgae harvesting -To complete the traditional broth mechanical separation -To protect subsequent pervaporation, distillation columns and heat exchangers from fouling -In the treatment of effluent treatment streams Pervaporation [13][14][15][16][17][18] -To reduce the distillation energy consumption, often as hybrid operation -To dewater ethanol after the 95 m% azeotrope…”

Section: Membrane Technique Applicationmentioning

confidence: 99%

A novel sintered metal fiber microfiltration of bio-ethanol fermentation broth

Kang

Baeyens

Tan

et al. 2015

Korean J. Chem. Eng.

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In bio-ethanol fermentation, the broth consists of mainly water and ethanol, together with particulate residues of unreacted feedstock and additives (mostly yeast). Prior to further processing (distillation), and to avoid fouling of heat exchangers and distillation columns, the solids residues of the broth need to be removed to as low a concentration as possible. The current mechanical separation (belt filter or centrifuge) can only remove +10 µm particles representing about 90% of the total solids content. The remaining 10% is usually recovered in the bottom stream of the first distillation column, and forms the stillage that is further treated. To avoid fouling and even eliminate the first distillation column where the ethanol fraction is only increased from 12% (feed) to 16% (top), a better particulate removal is required. Novel sintered metal fiber (SFM) fleeces are highly efficient for microfiltration, and the removal of suspended solids largely exceeds 99%. The paper (i) positions microfiltration in the overall bio ethanol process; (ii) describes the novel sintered metal fiber microfiltration application; (iii) experimentally determines the major operating characteristics of SFM and (iv) predicts the up-scaled operation by using a simplified filtration model. At an ambient feed temperature, the flux of permeate exceeds 5 m 3 /m 2 h for a TMP of 1.5 bar and a yeast concentration of 15 g/l, as commonly encountered in the fermenter broth.

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“…[62][63][64]66 Some results show that increasing the clay content (e.g >10 wt %) will lead to non-uniform and brittle films. [65][66][67][68] Further doping of functional salts into the polymer/clay films can lead to different physical performances. For example, iodinedoped poly(3-hexylthiophene)/organo-montomorillonite (P3HT/ organo-MMT) film showed increased electrical conductivity.…”

Section: Polymer/clay Filmmentioning

confidence: 99%