High-performance ester-crosslinked hollow fiber membranes for natural gas separations

Ma, Canghai; Koros, William J.

doi:10.1016/j.memsci.2012.10.024

Cited by 61 publications

(63 citation statements)

References 28 publications

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“…N-methylpyrrolidone its low volatility, low toxicity and high boiling point. In addition, to the dope to promote skin layer used to move the dope composition near to primary non-solvent, ethanol was process by balancing volatility and promotion of phase separation to offset the volatile solvent, THF 6 well-described earlier [24,38]. Fig.…”

Section: Methodsmentioning

confidence: 99%

“…Production of the outermost skin layer and open porous substructure is depicted in ternary phase diagram in Fig. 1 [13,24]. …”

Section: Characterization Of Membrane Performancementioning

confidence: 99%

“…3, co-extrusion through an annular die bore fluid with the polymer dope c solvents and non-solvents. The fibers are wound on a rotating drum and soaked in water bath for ~3 days, in which the water at ambient temperature solvents and non-solvents in the fibers transition porous layer just underneath described in earlier work [24].…”

Section: Asymmetric Hollow Fiber Spinningmentioning

confidence: 99%

“…Asymmetric hollow fiber spinning symmetric hollow fibers are spun through a dry-jet wet-quench hollow fiber spinning system, as quench spinning to form asymmetric hollow fiber membranes [24] extrusion through an annular die (spinneret) of a properly formulated dope creates the fiber bore. The bore fluid is simply a The fibers are wound on a rotating drum and soaked in water bath for at ambient temperature is changed twice a day to remove in the fibers.…”

Section: Scanning Electron Microscope (Sem)mentioning

confidence: 99%

“…Without crosslinking, under aggressive feed conditions, plasticization occurs; however, crosslinking suppresses the undesirable swelling-induced plasticization [20][21][22][23][24][25][26][27]. During crosslinking, asymmetric morphologies tend to partially collapse; however, starting with a thin selective layer ultimately leads to a thinner final crosslinked selective layer, so precursor development is a key technology area for crosslinkable 6F-based materials.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Thin-skinned intrinsically defect-free asymmetric mono-esterified hollow fiber precursors for crosslinkable polyimide gas separation membranes

Zhang

Labreche

et al. 2015

Journal of Membrane Science

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Section: Methodsmentioning

confidence: 99%

“…Production of the outermost skin layer and open porous substructure is depicted in ternary phase diagram in Fig. 1 [13,24]. …”

Section: Characterization Of Membrane Performancementioning

confidence: 99%

Section: Asymmetric Hollow Fiber Spinningmentioning

confidence: 99%

Section: Scanning Electron Microscope (Sem)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Thin-skinned intrinsically defect-free asymmetric mono-esterified hollow fiber precursors for crosslinkable polyimide gas separation membranes

Zhang

Labreche

et al. 2015

Journal of Membrane Science

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Hydrogen‐Bonded Polyimide/Metal‐Organic Framework Hybrid Membranes for Ultrafast Separations of Multiple Gas Pairs

Urban

2019

Adv Funct Materials

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Membranes have seen a growing role in mitigating the extensive energy used for gas separations. Further expanding their effectiveness in reducing the energy penalty requires a fast separation process via a facile technique readily integrated with industrial membrane formation platforms, which has remained a challenge. Here, an ultrapermeable polyimide/metal-organic framework (MOF) hybrid membrane is reported, enabling ultrafast gas separations for multiple applications (e.g., CO 2 capture and hydrogen regeneration) while offering synthetic enhanced compatibility with the current membrane manufacturing processes. The membranes demonstrate a CO 2 and H 2 permeability of 2494 and 2932 Barrers, respectively, with a CO 2 /CH 4 , H 2 /CH 4 , and H 2 /N 2 selectivity of 29.3, 34.4, and 23.8, respectively, considerably surpassing the current Robeson permeability-selectivity upper bounds. At a MOF loading of 55 wt%, the membranes display a record-high 16-fold enhancement of H 2 permeability comparing with the neat polymer. With mild membrane processing conditions (e.g., a heating temperature less than 80 °C) and a performance continuously exceeding Robeson upper bounds for over 5300 h, the membranes exhibit enhanced compatibility with stateof-the-art membrane manufacturing processes. This performance results from intimate interactions between the polymer and MOFs via extensive, direct hydrogen bonding. This design approach offers a new route to ultraproductive membrane materials for energy-efficient gas separations.

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Simultaneously tuning dense skin and porous substrate of asymmetric hollow fiber membranes for efficient purification of aggressive natural gas

Liu

Labreche

et al. 2019

AIChE Journal

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Highly permeable, selective, and stable asymmetric membranes are required to replace the traditional separation approaches for natural gas purification with higher energy efficiency and smaller footprints. Herein, we report on the design and engineering of defect‐free asymmetric hollow fiber membranes with a thin dense skin and highly porous substrate to effectively deal with aggressive natural gas. A crosslinkable polymer with rigid molecular structure and high molecular weight was synthesized for developing spinning dope with desirable solution properties. Phase separation behavior of the polymer was carefully controlled by systematic formulation of the dope composition and optimizing spinning conditions, thereby realizing simultaneously tuning dense skins and porous substrates of the spun asymmetric hollow fiber membranes. The crosslinked hollow fiber membrane, with well‐preserved delicate asymmetric nanostructures, exhibited unprecedentedly high and stable separation performance for long‐term processing extremely aggressive CO2/CH4 mixtures (with pressure up to 820 psi containing C6+ hydrocarbons), thereby showing great potential for practical application of natural gas purification. This work offers a new platform to create hollow fiber membranes with both high permeance and plasticization resistance in natural gas service. © 2019 American Institute of Chemical Engineers AIChE J, 65: 1269–1280, 2019

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High-performance ester-crosslinked hollow fiber membranes for natural gas separations

Cited by 61 publications

References 28 publications

Thin-skinned intrinsically defect-free asymmetric mono-esterified hollow fiber precursors for crosslinkable polyimide gas separation membranes

Thin-skinned intrinsically defect-free asymmetric mono-esterified hollow fiber precursors for crosslinkable polyimide gas separation membranes

Hydrogen‐Bonded Polyimide/Metal‐Organic Framework Hybrid Membranes for Ultrafast Separations of Multiple Gas Pairs

Simultaneously tuning dense skin and porous substrate of asymmetric hollow fiber membranes for efficient purification of aggressive natural gas

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