Desalination by air gap membrane distillation using a two hollow-fiber-set membrane module

Singh, Dhananjay Kumar; Sirkar, Kamalesh K.

doi:10.1016/j.memsci.2012.07.007

Cited by 70 publications

(22 citation statements)

References 20 publications

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“…Of particular interest to separation scientists, is the ability to fabricate hollow fiber membranes from self‐assembled block polymer materials . When implemented in full‐scale modules, hollow fiber membranes provide larger surface areas per module volume, which results in higher productivity per module . Several initial studies have demonstrated the feasibility of producing hollow fiber membranes from self‐assembled block polymers.…”

Section: Introductionmentioning

confidence: 99%

Nanoporous membranes generated from self‐assembled block polymer precursors: Quo Vadis?

Zhang

Sargent

Boudouris

et al. 2014

J of Applied Polymer Sci

104

135

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Nanoporous membranes based on self‐assembled block polymer precursors are an emerging class of promising separation, purification, and sensing devices due to the ability of researchers to control the nanostructure and chemistry of these multifunctional materials and devices. In fact, modern polymer chemistry provides techniques for the facile, controlled synthesis of the block polymers that constitute these devices. These designer macromolecules, in turn, can then self‐assemble into functional nanostructures depending upon the chemical identity of the synthesized block polymers and the thin film fabrication methods employed. After fabrication, these nanoporous membranes offer a highly tunable platform for applications that require high throughput, high surface area, homogeneous pore size, and varying material properties. And, with these readily tunable chemical and structural properties, block polymer membranes will allow for significant improvements in myriad applications. In this Review, we summarize the key advances, with a specific emphasis on the previous 5 years of work, that have allowed block polymer‐based membranes to reach their current level of technology. Furthermore, we project how these state‐of‐art, self‐assembled block polymer membrane technologies can be utilized in present‐day and future application arenas. In this way, we aim to demonstrate that the rigorous work performed on block polymer‐based membranes has laid a strong foundation that will allow these macromolecular systems to: (1) be major avenues of fundamental scientific research and (2) be parlayed into transferable technologies for the betterment of society in the imminent future. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41683.

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Section: Introductionmentioning

confidence: 99%

Nanoporous membranes generated from self‐assembled block polymer precursors: Quo Vadis?

Zhang

Sargent

Boudouris

et al. 2014

J of Applied Polymer Sci

104

135

View full text Add to dashboard Cite

show abstract

“…Now, many studies are being focused on the design of novel membrane module with energy recovery to decrease the energy consumption. Singh and Sirkar [10] illustrated experimentally AGMD module with internal heat recovery using two sets of hollow fine fibers in one cylindrical module kept in a vertical configuration. And the water vapor flux was up to 25 kg/m 2 h at higher brine inlet temperatures.…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

Study on the heat and mass transfer in AGMD module with latent heat recovery

Geng

Liu

et al. 2016

Desalination and Water Treatment

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A B S T R A C TA novel air gap membrane distillation (AGMD) module for desalination with latent heat recovery which consisted of parallel hollow fiber membranes and heat exchange hollow fibers was successfully developed. The temperature profiles of AGMD module designed with latent heat recovery along the radial direction and mass transfer coefficient across membrane (C m ), Knudsen diffusion coefficient across membrane (C Km ), molecular diffusion coefficient across membrane (C Mm ), and molecular diffusion coefficient in air gap (C Ma ) were obtained by establishing a heat and mass transfer model. The permeate flux (J D ) was highly sensitive to the hot feed inlet temperature, T hi . The maximum value of J D could reach 15.5 kg/m 2 h for module 1 and 20.2 kg/m 2 h for module 2 at T hi = 90˚C and T ci = 30˚C. The value of actual mass transfer coefficient across the membrane was in close to the value of Knudsen diffusion coefficient across the membrane, especially at high hot feed brine temperature. The membrane wall was the main resistance for mass transfer and contributed 60-70% to the total mass transfer resistance. The heat transfer across the heat exchange hollow fiber was the main heat transfer resistance and the heat transfer across the heat exchange hollow fibers was only around 3,238.1 W/m 2˚C . The temperature polarization coefficient was introduced to measure the actual driving force.

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“…In this work a new module concept is presented under the name of feed gap air gap membrane distillation (FGAGMD) which incorporates the solution to requirements (I)–(III). Fundamentally, it is a derivation of air gap membrane distillation (AGMD) [34,35], however the feed and the permeate solution are separated from the heating and cooling solution by addition of an extra channel. Precise details on the configuration are provided in Section 2.1 and Section 2.2.…”

Section: Introductionmentioning

confidence: 99%

Characterization and Assessment of a Novel Plate and Frame MD Module for Single Pass Wastewater Concentration–FEED Gap Air Gap Membrane Distillation

et al. 2019

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Membrane distillation (MD) is an up and coming technology for concentration and separation on the verge of reaching commercialization. One of the remaining boundaries is the lack of available full-scale MD modules and systems suitable to meet the requirements of potential industrial applications. In this work a new type of feed gap air gap MD (FGAGMD) plate and frame module is introduced, designed and characterized with tap water and NaCl–H2O solution. The main feature of the new channel configuration is the separation of the heating and cooling channel from the feed channel, enabling a very high recovery ratio in a single pass. Key performance indicators (KPIs) such as flux, gained output ratio (GOR), recovery ratio and thermal efficiency are used to analyze the performance of the novel module concept within this work. A recovery rate of 93% was reached with tap water and between 32–53% with salt solutions ranging between 117 and 214 g NaCl/kg solution with this particular prototype module. Other than recovery ratio, the KPIs of the FGAGMD are similar to those of an air gap membrane distillation (AGMD) channel configuration. From the experimental results, furthermore, a new MD KPI was defined as the ratio of heating and cooling flow to feed flow. This RF ratio can be used for optimization of the module design and efficiency.

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Desalination by air gap membrane distillation using a two hollow-fiber-set membrane module

Cited by 70 publications

References 20 publications

Nanoporous membranes generated from self‐assembled block polymer precursors: Quo Vadis?

Nanoporous membranes generated from self‐assembled block polymer precursors: Quo Vadis?

Study on the heat and mass transfer in AGMD module with latent heat recovery

Characterization and Assessment of a Novel Plate and Frame MD Module for Single Pass Wastewater Concentration–FEED Gap Air Gap Membrane Distillation

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