Comparison of various membrane distillation methods for desalination using hydrophobic ceramic membranes

Cerneaux, Sophie; Strużyńska, Izabela; Kujawski, Wojciech; Persin, M.; Larbot, A.

doi:10.1016/j.memsci.2009.03.025

Cited by 200 publications

(97 citation statements)

References 19 publications

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“…To date, the highest flux obtained for the ceramic membranes were obtained for alumina silanised membranes at feed and permeate temperatures of 53 °C and 18 °C, respectively [246]. Despite their lower pore size, these inorganic membranes did not exhibit a very high contact angle (141°) when compared with other membranes (up to 175° as shown in [244]). It clearly underlines the importance of surface energy in both reducing temperature polarization and…”

Section: Performance Of Inorganic Membranesmentioning

confidence: 96%

“…The contact angle on raw metal oxide materials were typically around 60° to 80°. The materials exhibit high surface energy and are therefore naturally hydrophilic, requiring functionalisation with hydrophobic groups in order to satisfy MD requirements [244,245]. Short aliphatic oligomers, alkoxy-silanes or fluoro-polymers can be easily grafted onto the surface of the membrane following a sol-gel approach, where the hydroxyl groups naturally present on the metal oxide are used to react with functional groups of the oligomers [242,[246][247][248].…”

Section: Ceramic Membranesmentioning

confidence: 99%

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Advances in Membrane Distillation for Water Desalination and Purification Applications

Camacho

Dumée

Zhang

et al. 2013

Water

627

342

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Membrane distillation is a process that utilizes differences in vapor pressure to permeate water through a macro-porous membrane and reject other non-volatile constituents present in the influent water. This review considers the fundamental heat and mass transfer processes in membrane distillation, recent advances in membrane technology, module configurations, and the applications and economics of membrane distillation, and identifies areas that may lead to technological improvements in membrane distillation as well as the application characteristics required for commercial deployment. Keywordsa function of temperature, vapor pressure, and of the gas molecular mass K 0 membrane characteristic defined by Equation (9) Kn Knudsen number K(T) a function of temperature and molecular weight of the gas l mean free path of the molecules l m distance between parallel spacer fibres (m) LEP Limit Entry Pressure (kPa) M molecular mass (g/mol) M w molecular weights of water (g/mol) M a molecular weights of air (g/mol) n number of CNTs per unit cross section in bucky-paper P pressure in the air gap (kPa) half time to reach the maximum intensity-laser flash technique (s) t proportion of conductive heat (balance due to evaporative heat) loss through the membrane T mean temperature in the pores (K)

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Section: Performance Of Inorganic Membranesmentioning

confidence: 96%

Section: Ceramic Membranesmentioning

confidence: 99%

Advances in Membrane Distillation for Water Desalination and Purification Applications

Camacho

Dumée

Zhang

et al. 2013

Water

627

342

View full text Add to dashboard Cite

show abstract

“…By applying vacuum directly to the permeate side, the membrane pores are de-aerated. The majority of studies in literature which compare VMD and DCMD have reported higher flux when using a VMD configuration [11][12][13]. Mericq et al successfully integrated a VMD step into a reverse osmosis (RO) system to treat RO brine, although permeate flux declined with increasing feed concentration [14].…”

Section: Introductionmentioning

confidence: 99%

Submerged membrane distillation for inland desalination applications

Meng

Hsu

et al. 2015

Desalination

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“…It has been reported that PV is more suitable for concentration-dehydration of solutions than for separation (Chapman et al, 2008). A comparison between reported research works about ethanol separation from aqueous solutions shows Membrane Distillation (MD) permeate flux values are 100 times higher than those obtained by PV (Cerneaux et al, 2009;Qiu et al, 2009). This is due to the porous nature of membranes used in MD, which allow higher permeability under same operating conditions.…”

Section: Introductionmentioning

confidence: 98%

“…The driven force in this technique is the partial vapor pressure difference on both sides of the membrane, directly linked to the process temperature (Rivier et al, 2002). The vapor passing through the membrane (permeate) can be assured in several ways: Direct Contact Membrane Distillation (DCMD) (Cerneaux et al, 2009;Hwang et al, 2011;Khayet, Mengual & Matsuura, 2005), Air Gap Membrane Distillation (AGMD) (Alkhudhiri, Darwish & Hilal, 2012), Vacuum Membrane Distillation (VMD) (Cerneaux et al, 2009) or using Sweeping Gas Membrane Distillation (SGMD) (Cojocaru & Khayet, 2011). From these configurations, VMD and SGMD are the ones having the largest industrial potential application, due to an easier recovery implementation principle (vacuum and sweep gas).…”

Section: Introductionmentioning

confidence: 99%

Operating conditions influence on VMD and SGMD for ethanol recovery from aqueous solutions

Espriella

Barón-Núñez

Muvdi-Nova

2015

CT&F Cienc. Tecnol. Futuro

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This work focuses on Vacuum Membrane Distillation (VMD) and Sweeping Gas Membrane Distillation (SGMD) as a separating technique of ethanol from aqueous solutions. VMD was studied at moderate temperature (30, 40 and 50°C) and pressure (0.11, 0.20 and 0.30 atm) conditions, whereas SGMD was studied at different temperatures (50 and 70°C) and air-flow rates (10x10 -6 and 20x10 -6 m 3. min -1 ). These techniques were experimentally studied using prepared ethanol-water solutions and fermented broths, with ethanol at 10% w/w. Under these operating conditions and using prepared ethanol-water solutions, an average total flux of 22.61 and 1.6 kg . m -2. h -1 , and concentration factors of 2.3 and 1.7 were obtained for VMD and SGMD, respectively. For fermented broths, total flux of 17.66 and 0.9 kg . m -2. h -1 , and concentration factors of 1.8 and 1.9 were obtained for VMD and SGMD, respectively. The fouling impact was also studied, finding a significant effect of pressure (vacuum) for VMD technique; mainly due to the biomass presence in the solution. Experimental results show that applying pressurization/depressurization cycles decreases membrane fouling, stabilizing flux and concentration in the permeate. While for SGMD configuration, the incidence of fouling was significantly lower. ABSTRACTHow to cite: Cotamo-De la Espriella, R. J., Barón-Núñez, F. W., Muvdi-Nova, C. J. (2015). Operating conditions influence on VMD and SGMD for ethanol recovery from aqueous solutions. CT&F -Ciencia, Tecnología y Futuro, 6(2), 69-80. INFLUENCIA DE LAS CONDICIONES DE OPERACIÓN EN VMD Y SGMD PARA LA RECUPERACIÓN DE ETANOL DE SOLUCIONES ACUOSAS INFLUÊNCIA DAS CONDIÇÕES DE OPERAÇÃO EM VMD E SGMD PARA A RECUPERAÇÃO DE ETANOL DE SOLUÇÕES AQUOSAS 70E ste trabalho está focado na Destilação com Membranas em Vácuo (VMD em inglês) e com Gás de Arrastre (SGMD, em inglês) como técnica para a separação do etanol de soluções aquosas. A VMD foi estudada utilizando condições moderadas de temperatura (30, 40 e 50°C) e pressão (0.11, 0.20 e 0.30 atm), enquanto a SGMD foi estudada em temperaturas de 50 e 70°C e fluxos de ar de 10x10 -6 e 20x10 -6 m 3. min -1 . As técnicas foram estudadas de forma experimental utilizando soluções etanol:água preparadas e caldos de fermentação, ajustando a concentração de etanol a 10% w/w. Sob estas condições de operação e utilizando soluções etanol:água preparadas, conseguimos obter flux totais médios de 22.61 e 1.6 kg . m -2. h -1 , e fatores de concentração de 2.3 e 1.7 para VMD e SGMD, respectivamente. No caso dos caldos de fermentação, obtivemos flux totais médios de 17.66 e 0.9 kg . m -2. h -1 , e fatores de concentração de 1.8 e 1.9 para VMD e SGMD, respectivamente. O impacto da incrustação também foi estudado, encontrando um efeito significativo da pressão (de vácuo) para a técnica VMD; principalmente, causada pela presença de biomassa na solução. Provas experimentais mostram que aplicando ciclos de pressurização/despressurização diminuímos a incrustação da membrana, estabilizando o fluxo e a concentração no perm...

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Comparison of various membrane distillation methods for desalination using hydrophobic ceramic membranes

Cited by 200 publications

References 19 publications

Advances in Membrane Distillation for Water Desalination and Purification Applications

Advances in Membrane Distillation for Water Desalination and Purification Applications

Submerged membrane distillation for inland desalination applications

Operating conditions influence on VMD and SGMD for ethanol recovery from aqueous solutions

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