Ethanol-Water Separation by Countercurrent Reverse Osmosis

Lee, E. K. L.; Babcock, W.C.; Bresnahan, Patricia A.

doi:10.1021/bk-1985-0269.ch019

Cited by 4 publications

(2 citation statements)

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“…Distillation is the most used separation technique, but is energy-consuming (Frolkova and Raeva, 2010;Chávez-Islas et al, 2011;García-Herreros et al, 2011;Singh and Rangaiah, 2017;Khalid et al, 2019). With the rapid development of membrane separation technology, pervaporation and reverse osmosis membranes are considered to be more cost saving for ethanol purification (Mulder et al, 1983;Choudhury et al, 1985;Lee et al, 1985;Frolkova and Raeva, 2010;Peng et al, 2010;Khalid et al, 2019). For example, polystyrene-grafted cellulose acetate membranes have been used for successful separation of ethanol/ water mixture by reverse osmosis (Choudhury et al, 1985).…”

Section: Introductionmentioning

confidence: 99%

Superwetting membrane-based strategy for high-flux enrichment of ethanol from ethanol/water mixture

Wei

Zhang²,

Chang³

et al. 2022

Front. Chem.

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Ethanol, which can be scalable produced from fermented plant materials, is a promising candidate to gasoline as the next-generation liquid fuel. As an energy-efficient alternative to distillation, membrane-based strategies including pervaporation and reverse osmosis have been developed to recover ethanol from fermentation broths. However, these approaches suffer the drawback of low separation flux. Herein, we report a superwetting membrane system to enrich ethanol from water in a high-flux manner. By synergistically regulating surface energy of the solid porous membrane and hydration between an additive inorganic potassium salt and water, concentrated ethanol can rapidly wetting and permeate the porous membrane, with the salt solution being blocked. Using this newly developed superwetting membrane system, we can achieve fast enrichment of ethanol from water, with flux of two orders magnitude higher than that of pervaporation and reverse osmosis membranes.

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Section: Introductionmentioning

confidence: 99%

Superwetting membrane-based strategy for high-flux enrichment of ethanol from ethanol/water mixture

Wei

Zhang²,

Chang³

et al. 2022

Front. Chem.

View full text Add to dashboard Cite

show abstract

“…One of them is a pressure-driven process called reverse osmosis (RO). In RO, no phase change is involved, thereby saving on an appreciable amount of energy consumption (LEE, BABCOCK, and BRESNAHAN 1985;Park and Geng 1992). Nevertheless, the major challenge lies in the high osmotic pressure required, especially as ethanol concentration increases (Ohya, Kazama, and Negishi 1981).…”

Section: Problem Statementmentioning

confidence: 99%