Fluorine-containing polyimide/polysilsesquioxane carbon molecular sieve membranes and techno-economic evaluation thereof for C3H6/C3H8 separation

Shin, Jong-Il; Yu, Hyun Jung; Park, Jun Hyung; Lee, Albert S.; Hwang, Seung Sang; Kim, Seok‐Jhin; Park, Sung-Hwan; Cho, Kie Yong; Won, Wangyun; Lee, Jong Suk

doi:10.1016/j.memsci.2019.117660

Cited by 36 publications

(18 citation statements)

References 57 publications

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“…The hybrid system can achieve significant energy savings and reduction of footprint in the hydrocarbon processes. Furthermore, a techno-economic analysis of the hybrid process (membrane followed by distillation) for C 3 H 6 /C 3 H 8 separation resulted in a lower total cost of 13.1% compared to the conventional distillation process [ 94 ].…”

Section: Polymer Precursors For Cms Membranesmentioning

confidence: 99%

“…In this case, the densified and impermeable nonporous inorganic silica phase decreased C 3 H 6 permeance, while C 3 H 6 /C 3 H 8 selectivity significantly increased. This was attributed to its 6-fold enhanced diffusivity selectivity [ 94 ].…”

Section: Polymer Precursors For Cms Membranesmentioning

confidence: 99%

“… Nanoporous carbon-silica membrane derived from 6FDA-DAM/DABA and LPSQ. Adapted from [ 94 ] with permission. Copyright (2020) Elsevier.…”

Section: Figurementioning

confidence: 99%

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A Review on Polymer Precursors of Carbon Molecular Sieve Membranes for Olefin/Paraffin Separation

et al. 2021

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Carbon molecular sieve (CMS) membranes have been developed to replace or support energy-intensive cryogenic distillation for olefin/paraffin separation. Olefin and paraffin have similar molecular properties, but can be separated effectively by a CMS membrane with a rigid, slit-like pore structure. A variety of polymer precursors can give rise to different outcomes in terms of the structure and performance of CMS membranes. Herein, for olefin/paraffin separation, the CMS membranes derived from a number of polymer precursors (such as polyimides, phenolic resin, and polymers of intrinsic microporosity, PIM) are introduced, and olefin/paraffin separation properties of those membranes are summarized. The effects from incorporation of inorganic materials into polymer precursors and from a pyrolysis process on the properties of CMS membranes are also reviewed. Finally, the prospects and future directions of CMS membranes for olefin/paraffin separation and aging issues are discussed.

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Section: Polymer Precursors For Cms Membranesmentioning

confidence: 99%

Section: Polymer Precursors For Cms Membranesmentioning

confidence: 99%

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A Review on Polymer Precursors of Carbon Molecular Sieve Membranes for Olefin/Paraffin Separation

et al. 2021

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“…In designing a homogeneously compatible polyimide and ladder-like structured polysilsesquioxane hybrid composite, several factors have to be considered. As both polyimide and ladder-like polysilsesquioxane have different solubility parameters, polyimide and ladder-like polysilsesquioxanes were found to be immiscible unless a finely tuned interface between organic functional groups was designed [36]. In our previous paper, we noted how hydrogen bonding interactions between the carboxylic acid groups of hexfluoroisopropylidine diphthalic anhydride-co-diaminomesitylene-co-diaminobenzoic acid derived polyimide, 6FDA-DAM:DABA (3:2) (PI) and the pyridine groups of ladder-like polysilsesquioxanes enabled a high degree of compatibility over those pairs without any interactive forces [36,37].…”

Section: Introductionmentioning

confidence: 99%

“…As both polyimide and ladder-like polysilsesquioxane have different solubility parameters, polyimide and ladder-like polysilsesquioxanes were found to be immiscible unless a finely tuned interface between organic functional groups was designed [36]. In our previous paper, we noted how hydrogen bonding interactions between the carboxylic acid groups of hexfluoroisopropylidine diphthalic anhydride-co-diaminomesitylene-co-diaminobenzoic acid derived polyimide, 6FDA-DAM:DABA (3:2) (PI) and the pyridine groups of ladder-like polysilsesquioxanes enabled a high degree of compatibility over those pairs without any interactive forces [36,37]. As such, in the present study, we designed a high molecular weight polyethylene glycol, PEG (1 K) grafted ladder-like polysilsesquioxane that can enable hydrogen bonding interactions with the carboxylic acid groups of 6FDA-DAM:DABA (3:2) (PI).…”

Section: Introductionmentioning

confidence: 99%

Tunable Crystalline Phases in UV-Curable PEG-Grafted Ladder-Structured Silsesquioxane/Polyimide Composites

et al. 2020

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A series of UV-curable hybrid composite blends containing a carboxylic acid functionalized polyimidewith varying amounts of high molecular weight (~1 K) PEG-grafted ladder-structured polysilsesquioxanes copolymerized with methacryl groups were fabricated and their structural, thermal, mechanical, and surface properties characterized. At a composite weight ratio of polyimide above 50 wt.%, a stark shift from amorphous to crystalline polyethylene glycol (PEG) phases were observed, accompanied by a drastic increase in both surface moduli and brittleness index. Moreover, fabricated composites were shown to have a wide range water contact angle, 9.8°–73.8°, attesting to the tunable surface properties of these amphiphilic hybrid polymer composites. The enhanced mechanical properties, combined with the utility of tunable surface hydrophilicity allows for the possible use of these hybrid polymer composites to be utilized as photosensitive polyimide negative photoresists for a myriad of semiconductor patterning processes.

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Purification of Propylene and Ethylene by a Robust Metal–Organic Framework Mediated by Host–Guest Interactions

Han

Kang

et al. 2021

Angewandte Chemie

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Industrial purification of propylene and ethylene requires cryogenic distillation and selective hydrogenation over palladium catalysts to remove propane,e thane and/or trace amounts of acetylene.Here,wereport the excellent separation of equimolar mixtures of propylene/propane and ethylene/ ethane,and of a1/100 mixture of acetylene/ethylene by ahighly robust microporous material, MFM-520, under dynamic conditions.Insitu synchrotron single crystal X-raydiffraction, inelastic neutron scattering and analysis of adsorption thermodynamic parameters reveal that as eries of synergistic hostguest interactions involving hydrogen bonding and p•••p stacking interactions underpin the cooperative binding of alkenes within the pore.Notably,the optimal pore geometry of the material enables selective accommodation of acetylene.The practical potential of this porous material has been demonstrated by fabricating mixed-matrix membranes comprising MFM-520, Matrimid and PIM-1, and these exhibit not only ah igh permeability for propylene ( % 1984 Barrer), but also as eparation factor of 7.8 for an equimolar mixture of propylene/propane at 298 K.

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Fluorine-containing polyimide/polysilsesquioxane carbon molecular sieve membranes and techno-economic evaluation thereof for C3H6/C3H8 separation

Cited by 36 publications

References 57 publications

A Review on Polymer Precursors of Carbon Molecular Sieve Membranes for Olefin/Paraffin Separation

A Review on Polymer Precursors of Carbon Molecular Sieve Membranes for Olefin/Paraffin Separation

Tunable Crystalline Phases in UV-Curable PEG-Grafted Ladder-Structured Silsesquioxane/Polyimide Composites

Purification of Propylene and Ethylene by a Robust Metal–Organic Framework Mediated by Host–Guest Interactions

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