Pervaporative separation of ethanol/water azeotrope using a novel chitosan-impregnated bacterial cellulose membrane and chitosan?poly(vinyl alcohol) blends

Abstract. Pervaporation, a membrane-based technique, is taken into consideration in order to separate water from biodiesel-methanol mixtures. Several operational conditions in biodiesel production could cause water contamination into the reaction mixture, which can affect biodiesel production and quality. In this study, bacterial cellulose-alginate (BCA) nanocomposite film was applied as a selective membrane in order to separate water from biodiesel-methanol mixtures using pervaporation. For effective operation, factors that affected the performance in the pervaporation, such as concentration of water in the biodiesel-methanol mixtures and temperature of the process were investigated. It was demonstrated that, the BCA membrane has good potential for removing water from the biodiesel-methanol mixtures. Under a permeate pressure of 10 mmHg and 30 °C, the BCA membrane could separate water from the mixture containing methyl ester (C10:0): methanol: water at a weight ratio of 42.3: 52.7: 5 with a total permeate flux of 148 g/(m 2 h) and a water selectivity of 332. The permeate was contained 94.5% w/w water and methyl ester was completely rejected by the BCA membrane. The increase of water concentration in biodiesel-methanol mixtures and the temperature rise resulted in an increase in the permeate flux but lowered the selectivity.

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“…5(b). The similar results were previously reported in pervaporation studies of BC and BC composite membranes [20,24,25]. …”

Section: Effect Of Water Content In Feedsupporting

confidence: 90%

Bacterial Cellulose-Alginate Membrane for Dehydration of Biodiesel-Methanol Mixtures

Suratago

Panitchakarn

Kerdlarpphon

et al. 2016

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“…PVA and PVP are wellknown synthetic polymers that are biocompatible and find applications in controlled-release studies 25,26 as well as membranes in separation science. 27,28 In this investigation, we have made an effort to understand the solution properties of the aforementioned polymers by measuring their densities at temperatures from 298.15 to 338.15 K to evaluate the excess molar volumes and activities in 1% aqueous solutions. The density results have been analyzed with the thermodynamic activity models of Flory and Huggins, whereas excess molar volumes have been computed from density data.…”

Section: Introductionmentioning

confidence: 99%

Aqueous‐solution and solid‐film properties of poly(vinyl alcohol), poly(vinyl pyrrolidone), gelatin, starch, and carboxymethylcellulose polymers

Mutalik

Manjeshwar

Wali

et al. 2007

J of Applied Polymer Sci

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With the density and viscosity results for five polymers-poly(vinyl alcohol) (PVA), poly(vinyl pyrrolidone) (PVP), gelatin (Ge), starch (St), and carboxymethylcellulose (CMC)-measured in aqueous solutions at different temperatures, we have computed the excess molar volumes and activities. Smaller excess molar volumes for PVA solutions are attributed to specific types of interactions, whereas for other polymers, these data are quite large, indicating dispersiontype interactions. The activity data of the polymer solutions vary widely, depending on the nature of the polymers and their intermolecular interactions. The freestanding film properties of the polymers indicate that Ge and PVA produce stable films, whereas brittle films can be obtained for PVP and St. The mechanical strength properties of PVA and CMC have been found to be suitable for membrane fabrication.

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“…Las membranas también se han utilizado para separación de polioles [41], clarificación de jugo de frutas [124], pervaporación de mezclas etanol-agua [11], [125], [126], pervaporación de componentes aromáticos de frutas [127], diálisis [128], [129], y permeación de gases [27], [130], [131]. En todos los casos las membranas han presentado selectividad para los componentes estudiados; sin embargo, uno de los principales inconvenientes es que para la mayor parte de los procesos de separación estudiados, el flux de permeado es bastante bajo.…”

Section: Aplicaciones De La Celulosa Bacterianaunclassified

Técnicas de fermentación y aplicaciones de la celulosa bacteriana: una revisión

2012

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ResumenLa celulosa bacteriana es un polímero obtenido por fermentación con microrganismos de los géneros Acetobacter, Rhizobium, Agrobacterium y Sarcina, de las cuales la especie más eficiente es la Acetobacter Xylinum. Este polímero presenta la misma estructura química de la celulosa de origen vegetal, pero difiere en su conformación y propiedades fisicoquímicas, lo que lo hace atractivo para diversas aplicaciones, especialmente en las áreas de alimentos, procesos de separación, catálisis y en medicina, gracias a su biocompatibilidad. Sin embargo, el principal problema es la producción a gran escala limitada por los bajos rendimientos, lo que genera la necesidad de desarrollar alternativas que permitan disminuir o eliminar las causas de esta limitación. En este artículo 1 Ingeniera Química Dr.Ing.

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Pervaporative separation of ethanol/water azeotrope using a novel chitosan-impregnated bacterial cellulose membrane and chitosan?poly(vinyl alcohol) blends

Cited by 85 publications

References 15 publications

Bacterial Cellulose-Alginate Membrane for Dehydration of Biodiesel-Methanol Mixtures

Bacterial Cellulose-Alginate Membrane for Dehydration of Biodiesel-Methanol Mixtures

Aqueous‐solution and solid‐film properties of poly(vinyl alcohol), poly(vinyl pyrrolidone), gelatin, starch, and carboxymethylcellulose polymers

Técnicas de fermentación y aplicaciones de la celulosa bacteriana: una revisión

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