ZIF-8 membranes supported on silicalite-seeded substrates for propylene/propane separation

Dangwal, Shailesh; Ronte, Anil; Lin, Han; Liu, Ruochen; Zhu, Jiahua; Lee, Jong Suk; Gappa-Fahlenkamp, Heather; Kim, Seok‐Jhin

doi:10.1016/j.memsci.2021.119165

Cited by 33 publications

(23 citation statements)

References 45 publications

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“…The cross‐sectional Scanning electron microscopy (SEM) image shows that the membrane with a thickness of ~2 μm is well intergrowth and closely attached on the α ‐Al 2 O 3 support (Figure 2B), which is further demonstrated by the x‐ray spectroscopy (EDX) result (Figure 2C). In contrast, a discontinuous MOF layer full of isolated MOF‐801 crystals was formed on the support by the in situ growth method (Figure S12), which is similar to many previous reports 33,34 . The x‐ray diffraction (XRD) patterns (Figure 2D) show that MOF‐801 membrane owns the obvious characteristic peaks, which well corresponds with the simulated MOF‐801 pattern except for the α ‐Al 2 O 3 support peaks.…”

Section: Resultssupporting

confidence: 85%

“…In contrast, a discontinuous MOF layer full of isolated MOF-801 crystals was formed on the support by the in situ growth method (Figure S12), which is similar to many previous reports. 33,34 The x-ray diffraction (XRD) patterns (Figure 2D) show that MOF-801 membrane owns the obvious characteristic peaks, which well corresponds with the simulated MOF-801 pattern except for the α-Al 2 O 3 support peaks.…”

Section: Resultssupporting

confidence: 60%

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MOF‐801 polycrystalline membrane with sub‐10 nm polymeric assembly layer for ion sieving and flow battery storage

Cao

Xia

et al. 2022

AIChE Journal

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Molecular sieving metal–organic framework (MOF) polycrystalline membranes have great potential for ion sieving and are desirable as efficient separators for devices of energy storage such as flow battery. Herein, we report a continuous MOF‐801 polycrystalline membrane with an ultrathin polymeric assembly layer (less than 10 nm) for the vanadium flow battery (VFB). Owing to the precise sub‐nanometer sieving pores and abundant H‐bond networks in MOF‐801 frameworks, the membrane exhibited better H/V selectivity (up to 194) and conductivity (about 0.028 S/cm) than commercial Nafion‐117 membrane (H/V selectivity: ~9.5, conductivity: 0.017 S/cm). VFB results revealed that a cell with above MOF polycrystalline membrane showed high coulombic efficiency (CE: 96.1%) and excellent energy efficiency (EE: 83.2%) at 20 mA/cm2, which was much comparable to Nafion membrane. This work demonstrates that MOF polycrystalline membrane is a promising candidate as ion sieving membrane for energy technique.

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Section: Resultssupporting

confidence: 85%

Section: Resultssupporting

confidence: 60%

MOF‐801 polycrystalline membrane with sub‐10 nm polymeric assembly layer for ion sieving and flow battery storage

Cao

Xia

et al. 2022

AIChE Journal

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“…As mentioned above, the conventional distillation method has consumed a great deal of cost and energy in the separation process, and the cost of constructing the distillation column is also costly and complicated, so it is urgent to develop an alternative separation method. Therefore, new inorganic chemical techniques such as zeolitic imidazolate framework (ZIF) and metal organic framework (MOF) have been recently researched to replace inefficient processes [2][3][4][5][6][7]. Furthermore, facilitated transfer membranes have recently been spotlighted, owing to the features of increasing selectivity and permeance simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Interactions of Ag Particles Stabilized by 7,7,8,8-Tetracyanoquinodimethane with Olefin Molecules in Poly(ether-block-amide)

2022

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In this study, to use a stabilized carrier, silver nanoparticles (AgNPs) were used as carriers and electron acceptors were added to activate the surface of AgNPs as olefin carriers. In addition, poly(ether-block-amide) (PEBAX), consisting of polyamide (hard segments) and polyether (soft segments), was investigated for the correlation of the between-segments ratio related to the stability of AgNPs and separation performance. As a result, contrary to the expectation that high permeance would be observed in PEBAX-1657/AgNPs/7,7,8,8-tetracyanoquinodimethane (TCNQ) membrane, which had a higher ratio of polyether soft segment, the PEBAX-5513/AgNPs/TCNQ membrane, which had a relatively high proportion of polyamide, showed a higher permeance without difference in selectivity. These unexpected data were attributable to the fact that the relatively abundant amount of PA groups in PEBAX-5513 was able to stabilize and positively polarize the surface of AgNPs, resulting in the stabilized and high performance of olefin separation.

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“…18−21 However, relatively low propylene permeances were reported when the α-alumina disk was used as a substrate. 7,22 Furthermore, the widely used α-Al 2 O 3 supports have quite large pores (pore diameter > 150 nm), leading more likely to discontinuous and/or nonhomogeneous ZIF-8 film formation. 23 ZIF-8 membranes were also grown on other inorganic supports.…”

Section: ■ Introductionmentioning

confidence: 99%

Synthesis of ZIF-8 Membranes on γ-Alumina Supports for Separation of Propylene/Propane Gas Mixture

Banihashemi

Lin

2022

Ind. Eng. Chem. Res.

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Zeolitic imidazolate framework-8 (ZIF-8) membranes have shown promising potential for the separation of industrially important propylene/propane mixtures. For industrial applications, it is necessary to synthesize a thin and defect-free ZIF-8 membrane with good integrity on scalable supports. In this work, we report the synthesis of ZIF-8 membranes on the sol–gel derived mesoporous γ-alumina layer coated on top of the α-alumina support. Thin (2.5 μm), high quality, and stable ZIF-8 membranes can be grown on the γ-alumina support grafted with 3-glycidoxypropyltrimethoxysilane (GLYMO) by the seeded secondary growth method. Propylene/propane equimolar mixture separation experiments were conducted to test the separation performance of membranes. Compared to the ZIF-8 membranes on the bare macroporous α-alumina support, ZIF-8 membranes prepared on the γ-alumina coated α-alumina support show much better separation characteristics, with a maximum propylene/propane separation factor of 225 and propylene permeance of 9.65 × 10–9 mol m–2 s–1 Pa–1. The ZIF-8 membrane synthesized on the scalable γ-alumina coated α-alumina support exhibits separation characteristics and stability similar to the best-performing ZIF-8 membranes on alumina supports with complex synthesis procedures difficult to scale up.

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ZIF-8 membranes supported on silicalite-seeded substrates for propylene/propane separation

Cited by 33 publications

References 45 publications

MOF‐801 polycrystalline membrane with sub‐10 nm polymeric assembly layer for ion sieving and flow battery storage

MOF‐801 polycrystalline membrane with sub‐10 nm polymeric assembly layer for ion sieving and flow battery storage

Interactions of Ag Particles Stabilized by 7,7,8,8-Tetracyanoquinodimethane with Olefin Molecules in Poly(ether-block-amide)

Synthesis of ZIF-8 Membranes on γ-Alumina Supports for Separation of Propylene/Propane Gas Mixture

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