Electrothermally Driven Membrane Distillation for Low-Energy Consumption and Wetting Mitigation

Li, Kuiling; Zhang, Yong; Wang, Zhiyong; Liu, Lie; Liu, Hongxin; Wang, Jun

doi:10.1021/acs.est.9b04861

Cited by 51 publications

(13 citation statements)

References 35 publications

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“…In this regard, JHs can be used for brine volume minimization and valuable salt/metal recovery, showing promising aspects for seawater desalination and brine water management. Furthermore, self-heating membranes via photothermal or Joule heating have been proposed by several researchers for tackling temperature polarization and reducing thermal losses for desalination performance enhancement. , Nanomaterials that are most commonly used for Joule heating membrane distillation (MD) include CNT and graphene. − …”

Section: Introductionmentioning

confidence: 99%

Stacked Laser-Induced Graphene Joule Heaters for Desalination and Water Recycling

Barbhuiya

Misra

Singh

2022

ACS Appl. Nano Mater.

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The global scenario of water shortage and pollution has necessitated the use of advanced water treatment and desalination technologies. Solar interfacial evaporation has shown promising results for clean water generation but depends on the sunlight intensity, which changes over time and climatic conditions. Furthermore, the solar-driven interfacial evaporation cannot operate in the dark and is susceptible to salt deposition. Here, we have explored the Joule heating effect in laser-induced graphene (LIG)-based Joule heaters (JHs) for interfacial water evaporation under different applied voltages. The effect of stacking of Joule heaters has been explored and found to give an enhanced evaporation rate with less spatial footprint and energy consumption. The evaporation rate in a single-layer LIG JH reached ∼5 kg·m–2·h–1 under the application of 10 V. The JH area and its stacking effect on evaporation rate, spatial footprint, and energy consumption were investigated. An increase in evaporation rate by seven times and reduction of electrical energy consumption by three times has been demonstrated by three levels of stacking compared to its equivalent triple-area LIG JH. The enhanced performance of the stacking configuration could be due to the enhanced heat transfer from the bottom JH to the upper JH, thermal concentration, and reduced thermal losses to the environment. The single-layer LIG JH also gave ∼2 kg·m–2·h–1 evaporation rate under natural sunlight and environmental conditions, showing potential for solar interfacial evaporation. The JHs also showed excellent resistance to salt deposition with self-salt-cleaning capability under the tested conditions. These compact stacked JH systems could be integrated with renewable energy, which can be operated in the presence and absence of sunlight. Such compact JH systems with a lesser spatial footprint, enhanced evaporation rate, and reduced energy requirement can help in providing constant water evaporation for various applications.

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Section: Introductionmentioning

confidence: 99%

Stacked Laser-Induced Graphene Joule Heaters for Desalination and Water Recycling

Barbhuiya

Misra

Singh

2022

ACS Appl. Nano Mater.

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“…They demonstrated an increase in GOR as the heated membrane surface reduces effects of TP. Since then, various groups have applied Joule heating to DCMD [103,104], AGMD [105] and VMD [106]. In VMD, the application of an electrothermal braid-reinforced PVDF hollow fiber membrane showed 2.5 times flux enhancement and significant suppression of TP.…”

Section: Dead-end Membrane Distillation (De-md)mentioning

confidence: 99%

Advances in Membrane Distillation Module Configurations

2022

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Membrane Distillation (MD) is a membrane-based, temperature-driven water reclamation process. While research emphasis has been largely on membrane design, upscaling of MD has prompted advancements in energy-efficient module design and configurations. Apart from the four conventional configurations, researchers have come up with novel MD membrane module designs and configurations to improve thermal efficiency. While membrane design has been the focus of many studies, development of appropriate system configurations for optimal energy efficiency for each application has received considerable attention, and is a critical aspect in advancing MD configurations. This review assesses advancements in modified and novel MD configurations design with emphasis on the effects of upscaling and pilot scale studies. Improved MD configurations discussed in this review are the material gap MD, conductive gap MD, permeate gap MD, vacuum-enhanced AGMD/DCMD, submerged MD, flashed-feed MD, dead-end MD, and vacuum-enhanced multi-effect MD. All of these modified MD configurations are designed either to reduce the heat loss by mitigating the temperature polarization or to improve the mass transfer and permeate flux. Vacuum-enhanced MD processes and MD process with non-contact feed solution show promise at the lab-scale and must be further investigated. Hollow fiber membrane-based pilot scale modules have not yet been sufficiently explored. In addition, comparison of various configurations is prevented by a lack of standardized testing conditions. We also reflect on recent pilot scale studies, ongoing hurdles in commercialization, and niche applications of the MD process.

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“…Otherwise, pore wetting happens by allowing the feed liquid to penetrate the membranes and thus continuous water flow is formed locally through the pores. There are several causes to break the balance during the MD processes, including membrane fouling, surfactants in the feed, membrane degradation, and capillary condensation [54,[60][61][62]. The primary cause of the MD membrane wetting is fouling.…”

Section: Causes Of Membrane Wettingmentioning

confidence: 99%

A Mini Review on Antiwetting Studies in Membrane Distillation for Textile Wastewater Treatment

et al. 2021

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The textile industry is an important contributor to the growth of the global economy. However, a huge quantity of wastewater is generated as a by-product during textile manufacturing, which hinders the ongoing development of textile industry in terms of environmental sustainability. Membrane distillation (MD), which is driven by thermal-induced vapor pressure difference, is being considered as an emerging economically viable technology to treat the textile wastewater for water reuse. So far, massive efforts have been put into new membrane material developments and modifications of the membrane surface. However, membrane wetting, direct feed solution transport through membrane pores leading to the failure of separation, remains as one of the main challenges for the success and potential commercialization of this separation process as textile wastewater contains membrane wetting inducing surfactants. Herein, this review presents current progress on the MD process for textile wastewater treatment with particular focuses on the fundamentals of membrane wetting, types of membranes applied as well as the fabrication or modification of membranes for anti-wetting properties. This article aims at providing insights in membrane design to enhance the MD separation performance towards commercial application of textile wastewater treatment.

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Electrothermally Driven Membrane Distillation for Low-Energy Consumption and Wetting Mitigation

Cited by 51 publications

References 35 publications

Stacked Laser-Induced Graphene Joule Heaters for Desalination and Water Recycling

Stacked Laser-Induced Graphene Joule Heaters for Desalination and Water Recycling

Advances in Membrane Distillation Module Configurations

A Mini Review on Antiwetting Studies in Membrane Distillation for Textile Wastewater Treatment

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