Increasing the Performance of Vacuum Membrane Distillation Using Micro-Structured Hydrophobic Aluminum Hollow Fiber Membranes

Ko, Chiun‐Cheng; Chen, Chien‐Hua; Chen, Yirui; Wu, Yu-Hsun; Lu, Soon-Chien; Hu, Fa-Chun; Li, Chia‐Ling; Tung, Kuo‐Lun

doi:10.3390/app7040357

Cited by 27 publications

(9 citation statements)

References 37 publications

(23 reference statements)

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“…The observed reduction of permeate fluxes (Figure 4) as well as LEPw values (Figure 3) with extended grafting time contributed to formation of a smoother surface (Table 1) showing better water-proof character. Summarizing the fabricated hydrophobic membranes possess good transport properties in AGMD compared with literature data [40,42,62,63]. Furthermore, the observed values of permeate fluxes are higher than for ceramic membranes tested in DCMD.…”

Section: Air-gap Membrane Distillation-separation Efficiency Of Modifsupporting

confidence: 56%

Hydrophobic Ceramic Membranes for Water Desalination

et al. 2017

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Hydrophilic ceramic membranes (tubular and planar) made of TiO 2 and Al 2 O 3 were efficiently modified with non-fluorinated hydrophobic grafting molecules. As a result of condensation reaction between hydroxyl groups on the membrane and reactive groups of modifiers, the hydrophobic surfaces were obtained. Ceramic materials were chemically modified using three various non-fluorinated grafting agents. In the present work, the influence of grafting time and type of grafting molecule on the modification efficiency was evaluated. The changes of physicochemical properties of obtained hydrophobic surfaces were determined by measuring the contact angle (CA), roughness (RMS), and surface free energy (SFE). The modified surfaces were characterized by contact angle in the range of 111-132 • . Moreover, hydrophobic tubular membranes were utilized in air-gap membrane distillation to desalination of sodium chloride aqueous solutions. The observed permeate fluxes were in the range of 0.7-4.8 kg·m −2 ·h −1 for tests with pure water. The values of permeate fluxes for membranes in contact with NaCl solutions were smaller, within the range of 0.4-2.8 kg·m −2 ·h −1 . The retention of NaCl in AGMD process using hydrophobized ceramic membranes was close to unity for all investigated membranes.

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Section: Air-gap Membrane Distillation-separation Efficiency Of Modifsupporting

confidence: 56%

Hydrophobic Ceramic Membranes for Water Desalination

et al. 2017

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“…Many authors reported that feed temperature showed a remarkable influence on the permeate flux with ceramic membranes applied to MD, regardless of configuration and feed solution. This propensity is explained by the Antoine equation, which predicts an exponential relationship between the vapor pressure difference and temperature due to the higher latent heat of water evaporation and higher heat transfer coefficient, without affecting the permeate quality.…”

Section: Overview Of Ceramic Membranes Applied To MDsupporting

confidence: 52%

“…Some authors reported that the sintering temperature influenced the wettability behavior after grafting of the prepared ceramic membranes . Lower sintering temperature increased contact angle but decreased LEP.…”

Section: Overview Of Ceramic Membranes Applied To MDmentioning

confidence: 99%

“…Sintering temperature influences the performance of MD. Ko et al reported that the permeate flux of the ceramic membrane sintered at 1,400°C is twice as high compared to that sintered at 1,500°C due to the higher average pore diameter and porosity of the former . Moreover, some studies observed an influence of grafting agent on MD performance …”

Section: Overview Of Ceramic Membranes Applied To MDmentioning

confidence: 99%

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Ceramic membranes applied to membrane distillation: A comprehensive review

Ramlow

Ferreira

Marangoni

et al. 2019

Int J Applied Ceramic Tech

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Membrane distillation (MD) has been increasingly studied in the past decade for its potential as a separation process of nonvolatile components. The present study demonstrates a comprehensive overview of the current progress and challenges in the application of ceramic membranes to MD based on the available state of the art.There are already published review papers about MD, but the present study focuses on ceramic membranes, which are still the few used in MD when compared to polymeric membranes. Significant issues such as membrane material, module, characteristics, and hydrophobic modification are discussed. The main operating conditions and their effects on the separation process are given. Current applications of ceramic membranes in MD are also presented. Likewise, challenges and future perspectives associated with MD performance using ceramic membranes are highlighted.A review focused on ceramic membranes applied specifically to MD will contribute for future research in order that this process achieves successful implementation in industry. K E Y W O R D Sapplications, grafting, permeability, properties, surface modification 2162 | RAMLOW et AL.

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“…However, the polymeric membranes widely adopted in wastewater treatment applications display relatively low thermal and chemical resistance. There has been an upsurge of interest in ceramic membranes for the treatment of high-strength wastewater, for which polymeric membranes are not suitable [4,5]. Ceramic membranes consisting of metal oxides usually exhibit high membrane porosity, membrane permeability, and narrow distribution of the membrane pore size.…”

Section: Introductionmentioning

confidence: 99%

Nanostructured Ceramic Photocatalytic Membrane Modified with a Polymer Template for Textile Wastewater Treatment

Ahmad

Kim

et al. 2017

Applied Sciences

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Photocatalytic ceramic membranes have attracted considerable attention for industrial wastewater treatment. However, morphological control of the membrane surface to improve its photocatalytic reactivity for the degradation of organic pollutants remains a challenge. Herein, we report a new nanostructured TiO 2 /Al 2 O 3 composite ceramic membrane prepared from a poly(oxyethylene methacrylate) (POEM) template through a sol-gel method and its photocatalytic performance in the treatment of a model dye compound. The POEM polymeric template allowed the homogeneous distribution of catalytic sites, i.e., the TiO 2 layer, on the Al 2 O 3 membrane surface, resulting in improved organic dye degradation along with effective fouling mitigation. The immobilization of a TiO 2 layer on the Al 2 O 3 membrane support also significantly enhanced the membrane adsorption capacity toward dye organic compounds. An organic removal efficiency of over 96% was achieved with the TiO 2 /Al 2 O 3 composite membrane under Ultraviolet (UV) irradiation. In addition, the self-cleaning efficiency of the TiO 2 /Al 2 O 3 composite membrane was remarkably improved by the degradation of organic foulants on the membrane under UV illumination.

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Increasing the Performance of Vacuum Membrane Distillation Using Micro-Structured Hydrophobic Aluminum Hollow Fiber Membranes

Cited by 27 publications

References 37 publications

Hydrophobic Ceramic Membranes for Water Desalination

Hydrophobic Ceramic Membranes for Water Desalination

Ceramic membranes applied to membrane distillation: A comprehensive review

Nanostructured Ceramic Photocatalytic Membrane Modified with a Polymer Template for Textile Wastewater Treatment

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