Pervaporative dehydration characteristics of an ethanol/water azeotrope through various chitosan membranes

Uragami, Tadashi; Saito, Tomoyuki; Miyata, Takashi

doi:10.1016/j.carbpol.2014.11.032

Cited by 40 publications

(16 citation statements)

References 18 publications

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“…Chitosan (poli-β-(1,4)-N-acetil-D-glucosamida) is a natural biopolymer which has received great attention due to its wide range of applications such as removal of metal ions in contaminated water, dyes removal from water [1][2][3][4][5][6][7][8] and its versatility to form different types of materials such as chitosan conjugated DNA nanoparticles, graft copolymerized chitosan, biomaterials and composite scaffolds among others [9][10][11][12][13][14][15][16]. However, the insolubility of this polysaccharide in regular organic solvents and water has encouraged researchers to change its structure to improve its potential use in different fields of interest [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

New chitosan-imine derivatives: from green chemistry to removal of heavy metals from water

Triana-Guzmán

Ruiz-Cruz

Romero

et al. 2018

Rev.Fac.Ing.Univ.Antioquia

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RESUMEN: Se sintetizaron tres nuevos derivados imino-quitosano por condensación entre los grupos amino terminales del quitosano y 4-bromometil-2-hidroxibenzaldehido A 1 , Ácido 4-formil-2-hidroxibenzoico A 2 , y (E)-6-((2-(piridin-2-il)hidrazono)metil)picolinaldehido A 3. Es de destacar en este trabajo que las reacciones fueron llevadas a cabo en medio acuoso empleando condiciones suaves de reacción (70°C). Los nuevos compuestos fueron caracterizados por RMN-1 H, FT-IR, análisis elemental, análisis termo gravimétrico (TGA) y calorimetría diferencial de barrido (DSC). Se realizó un estudio de solubilidad a diferentes valores de pH para los tres compuestos, estableciendo comportamientos diferentes a los obtenidos con el quitosano extraído. Por último, mediante medidas de absorción atómica, se investigó la capacidad de los derivados imino-quitosano en la remoción de iones de metales pesados en agua, tales como Pb(II) y Hg(II), el cual mostró un alto porcentaje de remoción a pH básicos pero uno a pH por debajo de 5. Adicionalmente la naturaleza del sustituyente determinó la solubilidad de los aductos resultantes ampliando así las potenciales aplicaciones de estos derivados de quitosano.

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Section: Introductionmentioning

confidence: 99%

New chitosan-imine derivatives: from green chemistry to removal of heavy metals from water

Triana-Guzmán

Ruiz-Cruz

Romero

et al. 2018

Rev.Fac.Ing.Univ.Antioquia

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“…The separation continues with a distillation where bioethanol/water mixture reached its azeotropic point. In this stage, the bioethanol reached the maximum concentration of 94.44% [8], reported that the azeotrope concentration of the ethanol-water mixture is 96.5%. However, the simulation showed that the azeotrope was formed at a lower concentration because the presence of some sub-products of the fermentation.…”

Section: Figure 1 Sscf Bioethanol Plantmentioning

confidence: 95%

Computer-aided environmental assessment and energy integration of bioethanol production from rice residues

Meramo¹,

Ojeda-Delgado²,

Sánchez-Tuirán³

2018

ces

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In this paper, environmental assessment and energy integration of a bioethanol production plant from rice chaff is made. The main product of the plant is the bioethanol, which is one of the most used biofuel in the energy sector. The bioethanol production was simulated using ASPEN PLUS software, obtaining in this way a base case of study. Then, pinch analysis was used to benchmark the potential energy integration. To attain the energy targets, a heat exchange network was proposed to reduce both the heating and cooling utilities. Finally, an environmental analysis of both the base case and the integrated process was made using graphical user interface (GUI) tool WAR (WAste Reduction algorithm of the National Renewable Energy Laboratory-NREL), to determine the potential environmental impacts of the process and to perform an evaluation between the base case and the integrated one.

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“…In recent years, the development of PV membranes for such applications has been studied extensively, with the fabrication of membranes from a large range of hydrophilic materials [67][68][69][70][71][72]. Whilst there have been many materials used in alcohol dehydration processes, research has taken a distinct shift towards the use of chitosan based membranes [64,67,70,[73][74][75][76]. The application of PV for dehydration is not limited to alcohols.…”

Section: Aqueous-organic Separationsmentioning

confidence: 99%

The potential of polymers of intrinsic microporosity (PIMs) and PIM/graphene composites for pervaporation membranes

et al. 2019

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Pervaporation (PV), a membrane process in which the feed is a liquid mixture and the permeate is removed as a vapour, offers an energy-efficient alternative to conventional separation processes such as distillation, and can be applied to mixtures that are difficult to separate, such as azeotropes. Here the principles of pervaporation and its industrial applications are outlined. Two classes of material that show promise for use in PV membranes are described: Polymers of intrinsic microporosity (PIMs) and 2D materials such as graphene. The literature regarding PV utilizing the prototypical PIM (PIM-1) and it hydrophilic hydrolysed form (cPIM-1) is reviewed. Self-standing PIM-1 membranes give competitive results compared to other membranes reported in the literature for the separation of alcohols and other volatile organic compounds from aqueous solution, and for organic/organic separations such as methanol/ethylene glycol and dimethyl carbonate/methanol mixtures. Blends of cPIM-1 with conventional polymers improve the flux for dehydration of alcohols. The incorporation of fillers, such as functionalised graphene-like fillers, into PIM-1 to form mixed matrix membranes can enhance the separation performance. Thin film composite (TFC) membranes enable very high fluxes to be achieved when a suitable support with high surface porosity is utilised. When functionalised graphene-like fillers are introduced into the selective layer of a TFC membrane, the lateral size of the flakes needs to be carefully controlled. There is a wide range of PIMs and 2D materials yet to be explored for PV applications, which offer potential to create bespoke membranes for a wide variety of organic/aqueous and organic/organic separations.

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Pervaporative dehydration characteristics of an ethanol/water azeotrope through various chitosan membranes

Cited by 40 publications

References 18 publications

New chitosan-imine derivatives: from green chemistry to removal of heavy metals from water

New chitosan-imine derivatives: from green chemistry to removal of heavy metals from water

Computer-aided environmental assessment and energy integration of bioethanol production from rice residues

The potential of polymers of intrinsic microporosity (PIMs) and PIM/graphene composites for pervaporation membranes

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