Synthesis of ZIF-8 based composite hollow fiber membrane with a dense skin layer for facilitated biogas upgrading in gas-liquid membrane contactor

Xu, Yilin; Li, Xin; Lin, Yuqing; Malde, Chandresh; Wang, Rong

doi:10.1016/j.memsci.2019.05.042

Cited by 32 publications

(14 citation statements)

References 68 publications

(85 reference statements)

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“…The morphology of ZIF-8-IPTMS hybrid materials was spherical, as shown in Figure 1b. This experimental phenomenon was also found by Xu et al, 28 but their crystal structures became only mildly round and the basic morphology of ZIF-8 crystals could still be observed. By DLS analysis, we also found that the average size of ZIF-8-IPTMS hybrid materials could be approximately 1 μm (Figure S2), which was beneficial for repairing the surface defects of the macroporous support.…”

Section: ■ Results and Discussionsupporting

confidence: 80%

Zeolitic Imidazolate Framework Membranes with a High H₂ Permeance Fabricated on a Macroporous Support with Novel Spherical Porous Hybrid Materials

Qin

Liu

et al. 2021

Ind. Eng. Chem. Res.

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An original synthesis strategy for tubular zeolitic imidazolate framework (ZIF) membranes was developed by the deposition of a novel porous amorphous hybrid material prepared by 3-isocyanatopropyltrimethoxysilane (IPTMS) and ZIF-8 crystals onto a coarse macroporous α-Al2O3 tubular support. This porous amorphous hybrid material (ZIF-8-IPTMS) not only strongly adhered to the support but also repaired the defects to make the support surface smooth due to the abundant hydroxyl groups and the appropriate particle size. Using this synthesis strategy, we successfully prepared a high-quality ZIF-8 membrane on an inorganic α-Al2O3 tubular support via the sufficient heterogeneous nucleation sites provided by the amino groups of ZIF-8-IPTMS. This ZIF-8 membrane with an ultrathin thickness of approximately 0.9 μm was prepared, and its ideal H2/CO2 selectivity increased as the temperature increased. The membrane exhibited a competitive selectivity of 13.8 with a remarkably high H2 permeance of 1.46 × 10–5 mol·m–2·s–1·Pa–1 at 90 °C and 0.1 MPa. H2/CO2 binary gas permeation measurements indicated a separation factor of 9.2, and the H2 permeance was maintained at 0.83 × 10–5 mol·m–2·s–1·Pa–1 at 90 °C and 0.1 MPa. This synthesis strategy was also suitable to fabricate ZIF-67 membranes. The ZIF-67 membrane with a thickness of approximately 1.2 μm exhibited a H2/CO2 ideal selectivity of 5.3 and maintained a high H2 permeance of 1.06 × 10–5 mol·m–2·s–1·Pa–1 at 35 °C and 0.1 MPa.

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Section: ■ Results and Discussionsupporting

confidence: 80%

Zeolitic Imidazolate Framework Membranes with a High H₂ Permeance Fabricated on a Macroporous Support with Novel Spherical Porous Hybrid Materials

Qin

Liu

et al. 2021

Ind. Eng. Chem. Res.

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“…Renewable energy resources represent the most promising approach to minimizing environmental pollution while still providing adequate energy supplies. − Among the green energy resources, hydrogen is viewed as a particularly important chemical feedstock in many applications, owing to its highly efficient conversion to energy. , Membrane-based gas separation technology is a common technique for separating and purifying hydrogen from gas mixtures, as it has low energy requirements, is cost-effective, and offers process flexibility. ,− …”

Section: Introductionmentioning

confidence: 99%

Insights into the Role of Polymer Conformation on the Cutoff Size of Carbon Molecular Sieving Membranes for Hydrogen Separation and Its Novel Pore Size Detection Technology

Lin

Tseng

et al. 2021

ACS Appl. Mater. Interfaces

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In this study, three polymer precursor conformations, dilute, semi-dilute, and concentrated, were used to fabricate carbon molecular sieving (CMS) membranes via a fixed carbonization protocol. The effects of the precursor conformation on the microstructure of the resultant CMS membranes were characterized by Raman analysis. Their ability to separate light gases, such as H2/CH4 and H2/N2, was assessed with a single-gas system. Additionally, a novel method was proposed to detect the cutoff size of the CMS membranes created in this study. The method combined high-resolution transmission electron microscopy (HR-TEM) and a focused ion beam (FIB) system. Finally, due to the semi-dilute solution’s denser polymer chains and lack of severe polymer entanglement, highly graphited CMS membranes with excellent gas separation performance were successfully synthesized using a semi-dilute polyetherimide dope solution. Interlayer distances in the carbon matrix were visualized and measured using our novel probing tool (HR-TEM and FIB) and software. The CMS membrane fabricated with a semi-dilute dope exhibited the best gas separation performance of the tested membranes. It had the most ordered carbon sheet orientation and exhibited a superior selectivity of H2/CH4 = 293 with a hydrogen permeability of 1138.7 Barrer, far surpassing the reported permselectivity of other membranes. We believe that the high H2/CH4 selectivity presented here is unprecedented for CMS membranes reported in the literature.

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“…Mixed matrix membranes (MMMs), which are composed of a polymeric matrix and inorganic fillers, are considered as the ideal pervaporation membrane for bioethanol recovery, as they combine the merits of both polymeric and inorganic membranes. , However, the polymer–particle interfacial defects in MMMs place a curb upon the separation performance enhancement. , Various interfacial designs have been employed to eliminate the interfacial defects, such as employing undried particles directly, surface modifications of nanofillers, − and fabricating covalently linked particle–polymer MMMs. − Among the above designs, utilizing covalent bonds to link polymer and particles in MMMs is considered as the ideal method to eliminate polymer–particle interfacial defects, thereby ensuring membrane stability and separation efficiency.…”

Section: Introductionmentioning

confidence: 99%

Facile Covalent Crosslinking of Zeolitic Imidazolate Framework/Polydimethylsiloxane Mixed Matrix Membrane for Enhanced Ethanol/Water Separation Performance

Zhu

et al. 2020

ACS Sustainable Chem. Eng.

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The interfacial design is critical in preparing high-performance mixed matrix membranes (MMMs), especially for the separation of larger sized components from mixtures. Herein, a facile and novel strategy was employed to design covalently linked zeolitic imidazolate framework-8-polydimethylsiloxane (ZIF-8@PDMS) MMMs without interfacial defects by a one-step synthesis route for ethanol recovery from ethanol aqueous solution. In this strategy, 3-glycidyloxypropyltrimethoxysilane (GOPTS) worked as the covalent linker of PDMS and amine-functionalized ZIF-8 nanoparticles (AZIF-8) simultaneously. The chemical structures and morphologies of AZIF-8 and AZIF-8@PDMS MMMs were demonstrated by various characterization techniques. The results exhibited that AZIF-8 and the MMMs were successfully prepared and AZIF-8 as the filler displayed better dispersion in the PDMS matrix and compatibility with the PDMS matrix as compared to ZIF-8 or GOPTS-modified ZIF-8 (GZIF-8). Therefore, AZIF-8@PDMS MMMs showed more excellent separation performance than ZIF-8 or GZIF-8-filled MMMs. In particular, AZIF-8@PDMS MMM with 7 wt % AZIF-8 loading exhibited the highest separation factor of 17.7 and a comparable total flux of 585.6 g/m2 h at 40 °C with 5 wt % ethanol aqueous solution, which were improved by 176.6 and 34.5%, respectively, in comparison with the pristine PDMS membrane, breaking the “trade-off” effect between the flux and separation factor. This study might provide some new insights into the fabrication of high-performance MMMs for pervaporation recovery of various organic systems.

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Synthesis of ZIF-8 based composite hollow fiber membrane with a dense skin layer for facilitated biogas upgrading in gas-liquid membrane contactor

Cited by 32 publications

References 68 publications

Zeolitic Imidazolate Framework Membranes with a High H₂ Permeance Fabricated on a Macroporous Support with Novel Spherical Porous Hybrid Materials

Zeolitic Imidazolate Framework Membranes with a High H₂ Permeance Fabricated on a Macroporous Support with Novel Spherical Porous Hybrid Materials

Insights into the Role of Polymer Conformation on the Cutoff Size of Carbon Molecular Sieving Membranes for Hydrogen Separation and Its Novel Pore Size Detection Technology

Facile Covalent Crosslinking of Zeolitic Imidazolate Framework/Polydimethylsiloxane Mixed Matrix Membrane for Enhanced Ethanol/Water Separation Performance

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Synthesis of ZIF-8 based composite hollow fiber membrane with a dense skin layer for facilitated biogas upgrading in gas-liquid membrane contactor

Cited by 32 publications

References 68 publications

Zeolitic Imidazolate Framework Membranes with a High H2 Permeance Fabricated on a Macroporous Support with Novel Spherical Porous Hybrid Materials

Zeolitic Imidazolate Framework Membranes with a High H2 Permeance Fabricated on a Macroporous Support with Novel Spherical Porous Hybrid Materials

Insights into the Role of Polymer Conformation on the Cutoff Size of Carbon Molecular Sieving Membranes for Hydrogen Separation and Its Novel Pore Size Detection Technology

Facile Covalent Crosslinking of Zeolitic Imidazolate Framework/Polydimethylsiloxane Mixed Matrix Membrane for Enhanced Ethanol/Water Separation Performance

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Product

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Zeolitic Imidazolate Framework Membranes with a High H₂ Permeance Fabricated on a Macroporous Support with Novel Spherical Porous Hybrid Materials

Zeolitic Imidazolate Framework Membranes with a High H₂ Permeance Fabricated on a Macroporous Support with Novel Spherical Porous Hybrid Materials