Fabrication of highly permeable <scp>PDMS</scp>@<scp>ZIF</scp>‐8/<scp>PVDF</scp> hollow fiber composite membrane in module for ethanol‐water separation

Liu, Wei‐Min; Mao, Heng; Wang, Yujie; Li, Shen‐Hui; Feng, Yingnan; Xu, Li‐Hao; Wang, Sen; Pei, Chan; Zhao, Zhi‐Ping

doi:10.1002/aic.18120

Cited by 9 publications

(2 citation statements)

References 55 publications

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“…The prepared membrane exhibited a good ethanol flux (1.11 kg m −2 .h −1 ) and an acceptable separation factor of 7.5 for the pervaporation process of 5 wt% ethanol solution at 40 °C. 39 Wang et al prepared an MCM-41@ZIF-8/PDMS hybrid membrane for the recovery of bio-alcohol from diluted aqueous solutions. The hybrid membrane exhibited an exceptional separation factor of 10.4 in the separation of 5% wt% ethanol/water mixture.…”

Section: Polydimethylsiloxane-carbon Nanotube/tetrazole Membranementioning

confidence: 99%

Ethanol production from sugarcane bagasse by modified PDMS membrane in a membrane bioreactor: pervaporation technique

Zabihi,

Esfahanian

2024

J of Chemical Tech & Biotech

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BACKGROUNDBioethanol is considered a highly promising alternative to fossil fuels due to its derivation from renewable sources. Reducing the disadvantages of conventional fermentation requires removing the product from the fermentation broth after its formation. Therefore, coupling the membrane separation with a biological process in a single unit leads a reduction of substrate and product inhibitions.RESULTSIn this work, bioethanol production was investigated in a membrane bioreactor (MBR) with sugarcane bagasse (lignocellulose waste) as a renewable source by the sulfuric acid hydrolysis process. Firstly, the optimum conditions to produce the maximum amount of sugar by acid hydrolysis were determined. Second, the membrane bioreactor and pervaporation unit equipped with poly(dimethyl siloxane) carbon nanotube/Tetrazole membrane (PDMS‐CNT/Tetrazole) was fabricated. Third, bioethanol production in a conventional batch reactor (CBR) and the novel MBR was implemented. The outcomes of the two kinds of reactors were then compared. The results illustrated that the optimum conditions for acid hydrolysis are at a temperature of 199.4 °C, an operation time of 30.77 min, and an acid concentration of 1.12%. The obtained data shows that the ethanol production in MBR was increased by 103.6% over conventional fermentation. Furthermore, the pervaporated ethanol concentration was higher than that of the broth because of the high membrane selectivity, where a maximum ethanol concentration of 165.7 g L−1 in the cold trap was achieved.CONCLUSIONFinally, the results illustrate that the MBR can decrease the cell density growth rate and dominate any substrate and product inhibitions, while keeping process productivity for ethanol quite high. © 2024 Society of Chemical Industry (SCI).

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Section: Polydimethylsiloxane-carbon Nanotube/tetrazole Membranementioning

confidence: 99%

Ethanol production from sugarcane bagasse by modified PDMS membrane in a membrane bioreactor: pervaporation technique

Zabihi,

Esfahanian

2024

J of Chemical Tech & Biotech

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“…Membrane has been widely used in water treatment 1–3 . To ensure stable and continuous production in membrane separation processes, exceptional anti‐fouling properties and self‐cleaning capabilities of membrane modules are essential 4 .…”

Section: Introductionmentioning

confidence: 99%

Coral‐tentacle‐inspired antifouling membrane spacer: A natural solution for biofouling prevention

Huang,

Lu,

Chen

et al. 2024

AIChE Journal

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Fouling of membrane spacers leads to increased pressure drop and reduced lifespan of membrane modules. Cleaning these fouled spacers is challenging due to strong foulant‐membrane spacer interactions. To address this issue, we introduce a novel spacer, PP‐N‐F, inspired by coral's antifouling properties. This spacer features on‐demand antifouling capabilities through a sequential growth process of functional polymer brushes on its surface. It not only possesses lower surface free energy characteristics than polypropylene spacers, but also exhibits controllable morphological changes similar to swaying coral tentacles. Temperature control strengthens the interfacial hydration layer, mitigating the trade‐off between anti‐adsorption and hydrophobicity of fluorinated surface. The temperature‐responsive surface changes enhance foulant desorption efficiency. Compared to a commercial spacer, PP‐N‐F shows an 89.3% reduction in foulant adsorption and a 61.7% decrease in pressure drop increment after 48 h cross‐flow filtration experiments. This work provides valuable insights for advanced anti‐fouling membrane module design.

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Ligand‐engineered Zr‐MOF membranes with fast water transport channels for alcohol–water separation

Mo,

Jin,

Zhou

et al. 2024

AIChE Journal

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Metal–organic framework (MOF) membranes with rich functionality and a tunable pore system are promising for molecular separation. However, an inadequate pore microenvironment and low water stability may hamper the extension of their use in gas separation to liquid separation (e.g., organic solvent dehydration). In this study, we report a high‐valence Zr‐MOF membrane with high stability and tunable pore microenvironment, prepared using a mixed‐ligand strategy based on fumarate (fum) and 2‐methylfumarate (mes) ligands for the pervaporation dehydration of alcohols. The introduction of a methyl group in the ligand side chain narrowed the aperture size while balancing the hydrophilicity, thus facilitating the fast and selective permeation of water over alcohol molecules. The resulting mes/fum‐Zr‐MOF membrane with a mes content of 30% displayed excellent butanol/water separation performance with total flux of 5226 g−1·m−2·h−1, separation factor of 1281, and water content of 99.3% in the permeate, transcending the upper‐bound of state‐of‐the‐art MOF and polymer membranes, thereby exhibiting immense potential for alcohols dehydration.

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Fabrication of highly permeable PDMS@ZIF‐8/PVDF hollow fiber composite membrane in module for ethanol‐water separation

Cited by 9 publications

References 55 publications

Ethanol production from sugarcane bagasse by modified PDMS membrane in a membrane bioreactor: pervaporation technique

Ethanol production from sugarcane bagasse by modified PDMS membrane in a membrane bioreactor: pervaporation technique

Coral‐tentacle‐inspired antifouling membrane spacer: A natural solution for biofouling prevention

Ligand‐engineered Zr‐MOF membranes with fast water transport channels for alcohol–water separation

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