Carbon molecular sieve membranes with integrally skinned asymmetric structure for organic solvent nanofiltration (OSN) and organic solvent reverse osmosis (OSRO)

Abdulhamid, Mahmoud A.; Hardian, Rifan; Székely, György

doi:10.1016/j.apmt.2022.101541

Cited by 7 publications

(16 citation statements)

References 28 publications

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“…Therefore, this could be used for both OSN and OSRO. 10 Liu et al built an OSRO membrane using polyketone-supported polyamide (PA), with a two-step heat treatment for post-treatment. The two-step heat treatment increased the separation factor for methanol in a methanol/ toluene mixture from 8.4 to 45.0, which showed its remarkable influence on the membrane structure.…”

Section: Introductionmentioning

confidence: 99%

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Thin-Film Nanocomposite Membrane Based on Mineral Silicate Maifanite for Organic Solvent Reverse Osmosis

Luo

Tong

Jia

et al. 2023

Ind. Eng. Chem. Res.

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Modern industries usually require membrane separation technologies to perform well in organic solvent systems; however, typical commercialized reverse osmosis (RO) membranes often suffer from swelling and instability. Herein, we proposed a “CCC” post-treatment method to directly upgrade a traditional RO membrane and extend its potential application in the deep purification of integrated circuit materials. This method combines inorganic maifanite particles and organic polymer adamantane structures, benefiting from the merits of inorganic and organic materials, to successfully establish a stable mixed matrix membrane (MMM) structure on a thin-film nanocomposite (TFN) membrane surface after the CCC post-treatment, involving conditioning, cross-linking, and curing. The as-prepared TFN membrane was characterized using Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, energy-dispersive spectroscopy, scanning electron microscopy, and atomic force microscopy and evaluated using organic solvent RO. This study offers a new perspective and an effective solution for the separation of inorganic salts from organic solvents. The as-prepared TFN MMM was able to separate 99.1% of Li+, 96.8% of Ca2+, 96.9% of Zn2+, and 98.9% of Al3+ from an organic solvent through simple dead-end filtration with a stable performance and had a competitive capacity in the purification of lithium carbonate.

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Section: Introductionmentioning

confidence: 99%

“…Temperature variations enabled the fine-tuning of the molecular weight cutoff (M W CO), pore diameter, and separation performance. Therefore, this could be used for both OSN and OSRO . Liu et al built an OSRO membrane using polyketone-supported polyamide (PA), with a two-step heat treatment for post-treatment.…”

Section: Introductionmentioning

confidence: 99%

Thin-Film Nanocomposite Membrane Based on Mineral Silicate Maifanite for Organic Solvent Reverse Osmosis

Luo

Tong

Jia

et al. 2023

Ind. Eng. Chem. Res.

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“…Carbon molecular sieves (CMS) have shown great potential as high-performance membrane materials in gas and organic solvent separation due to their thermal and chemical stability as well as scalability. − Various types of precursors including polyimides , and cellulose-based polymers , have been investigated for the CMS membranes for gas separations. Recent studies have also highlighted the potential of CMS membranes for treating dissolved organics in water via an organic selective separation. , A critical advantage of CMS as a membrane material is that its pore size distribution (PSD) can be precisely engineered by altering the polymer precursors and pyrolysis conditions. − CMS membranes offer tailored rates of guest molecule mobility within the microporous environment, offering the potential to address specific separation challenges encountered in wastewater remediation.…”

Section: Introductionmentioning

confidence: 99%

Structure–Transport Relationships of Water–Organic Solvent Co-transport in Carbon Molecular Sieve (CMS) Membranes

Yoon,

Ren,

Sarswat

et al. 2023

Ind. Eng. Chem. Res.

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We explore the effects of the carbon molecular sieve (CMS) microstructure on the separation performance and transport mechanism of water–organic mixtures. Specifically, we utilize PIM-1 dense films and integrally skinned asymmetric hollow fiber membranes as polymer precursors for the CMS materials. The PIM-1 membranes were pyrolyzed under several different pyrolysis atmospheres (argon, carbon dioxide, and diluted hydrogen gas) and at multiple pyrolysis temperatures. Detailed gas physisorption measurements reveal that membranes pyrolyzed under 4% H2 and CO2 had broadened ultramicropore distributions (pore diameter <7 Å) compared to Ar pyrolysis, and pyrolysis under CO2 increased ultramicropore volume and broadened micropore distributions at increased pyrolysis temperatures. Gravimetric water and p-xylene sorption and diffusion measurements reveal that the PIM-1-derived CMS materials are more hydrophilic than other CMS materials that have been previously studied, which leads to sorption-diffusion estimations showing water-selective permeation. Water permeation in the vapor phase, pervaporation, and liquid-phase hydraulic permeation reveal that the isobaric permeation modes (vapor permeation and pervaporation) are reasonably well predicted by the sorption-diffusion model, whereas the hydraulic permeation mode is significantly underpredicted (>250×). Conversely, the permeation of p-xylene is well predicted by the sorption-diffusion model in all cases. The collection of pore size analysis, vapor sorption and diffusion, and permeation in different modalities creates a picture of a combined transport mechanism in which waterunder high transmembrane pressurespermeates via a Poiseuille-style mechanism, whereas p-xylene solutes in the mixture permeate via sorption-diffusion.

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“…The key to OSN technology is OSN membranes. According to the membrane configurations, OSN membranes could be classified as flat sheet (FS) [ 12 , 13 ], tubular [ 14 ], or hollow fiber (HF) [ 15 ] OSN membranes (as shown in Figure 1 ). Among the three configurations, HF OSN membranes show greater potential in practical application of OSN technology due to their advantages of high packing density, self-supporting structure, and low fouling tendency [ 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Hollow Fiber Membrane for Organic Solvent Nanofiltration: A Mini Review

Liu

Wang

et al. 2022

Membranes

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Organic solvents take up 80% of the total chemicals used in pharmaceutical and related industries, while their reuse rate is less than 50%. Traditional solvent treatment methods such as distillation and evaporation have many disadvantages such as high cost, environmental unfriendliness, and difficulty in recovering heat-sensitive, high-value molecules. Organic solvent nanofiltration (OSN) has been a prevalent research topic for the separation and purification of organic solvent systems since the beginning of this century with the benefits of no-phase change, high operational flexibility, low cost, as well as environmental friendliness. Especially, hollow fiber (HF) OSN membranes have gained a lot of attention due to their high packing density and easy scale-up as compared with flat-sheet OSN membranes. This paper critically reviewed the recent research progress in the preparation of HF OSN membranes with high performance, including different materials, preparation methods, and modification treatments. This paper also predicts the future direction of HF OSN membrane development.

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Carbon molecular sieve membranes with integrally skinned asymmetric structure for organic solvent nanofiltration (OSN) and organic solvent reverse osmosis (OSRO)

Cited by 7 publications

References 28 publications

Thin-Film Nanocomposite Membrane Based on Mineral Silicate Maifanite for Organic Solvent Reverse Osmosis

Thin-Film Nanocomposite Membrane Based on Mineral Silicate Maifanite for Organic Solvent Reverse Osmosis

Structure–Transport Relationships of Water–Organic Solvent Co-transport in Carbon Molecular Sieve (CMS) Membranes

Hollow Fiber Membrane for Organic Solvent Nanofiltration: A Mini Review

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