Energy-efficient separation alternatives: metal–organic frameworks and membranes for hydrocarbon separation

Yang, Lifeng; Qian, Siheng; Wang, Xiaobing; Cui, Xili; Chen, Banglin; Xing, Huabin

doi:10.1039/c9cs00756c

Cited by 498 publications

(309 citation statements)

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“…The use of mixed-matrix membranes featuring porous materials such as MOFs, COFs or 2D polymers as llers triggered a lot of promising research, creating materials with high selectivities for molecular separations and good ux. [218][219][220][221][222][223][224][225] However, the interfacial incompatibility between the porous ller and the polymer oen leads to the formation of voids and pinholes, which create non-selective pathways through the membrane. The construction of defect-free membranes with framework material based llers has been demonstrated, although relatively thick llers were used, in the range of tens of micrometres.…”

Section: Optoelectronicsmentioning

confidence: 99%

2D framework materials for energy applications

et al. 2021

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Section: Optoelectronicsmentioning

confidence: 99%

2D framework materials for energy applications

et al. 2021

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“…Metal-organic frameworks (MOFs), as a new generation of porous functional materials, have been arousing extensive interest for their tunable attributes and expansive applications, spanning gas storage and separation, sensing, environmental decontamination, energy storage and conversion, and heterogenous catalysis. [1][2][3][4][5][6][7][8][9][10] In virtue of many well-developed construction strategies, hundreds of thousands of MOFs are obtained through direct or post-synthetic approaches, contributing enormous structural and functional diversity. [11][12][13][14] Despite a few robust MOFs, such as the famous UiO, [15,16] ZIF, [17,18] MOF, [19][20][21][22] MIL, [23,24] PCN, [25][26][27] and NU series, [28,29] most of existing MOFs are far away from practical use due to their relatively weak stability.…”

Section: Introductionmentioning

confidence: 99%

In Situ Porphyrin Substitution in a Zr(IV)‐MOF for Stability Enhancement and Photocatalytic CO₂ Reduction

Kong

Zhou

et al. 2021

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110

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Despite numerous inherent merits of metal-organic frameworks (MOFs), structural fragility has imposed great restrictions on their wider involvement in many applications, such as in catalysis. Herein, a strategy for enhancing stability and enabling functionality in a labile Zr(IV)-MOF has been proposed by in situ porphyrin substitution. A size-and geometry-matched robust linear porphyrin ligand 4,4′-(porphyrin-5,15-diyl)dibenzolate (DCPP 2− ) is selected to replace the 4,4′-(1,3,6,8-tetraoxobenzo[lmn][3,8]phenanthroline-2,7(1H,3H,6H,8H)-diyl)dibenzoate (NDIDB 2− ) ligand in the synthesis of BUT-109(Zr), affording BUT-110 with varied porphyrin contents. Compared to BUT-109(Zr), the chemical stability of BUT-110 series is greatly improved. Metalloporphyrin incorporation endows BUT-110 MOFs with high catalytic activity in the photoreduction of CO 2 , in the absence of photosensitizers. By tuning the metal species and porphyrin contents in BUT-110, the resulting BUT-110-50%-Co is demonstrated to be a good photocatalyst for selective CO 2 -to-CO reduction, via balancing the chemical stability, photocatalytic efficiency, and synthetic cost. This work highlights the advantages of in situ ligand substitution for MOF modification, by which uniform distribution and high content of the incoming ligand are accessible in the resulting MOFs.More importantly, it provides a promising approach to convert unstable MOFs, which mainly constitute the vast MOF database but have always been neglected, into robust functional materials.

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“…Physisorption based on porous materials has received considerable attention as a non‐thermal and energy‐efficient technique for gas separation and purification 8‐14 . Nevertheless, most materials reported for C 3 H 6 /C 3 H 8 separation, involving zeolites, 15,16 activated carbons 17 and metal–organic frameworks (MOFs) 18‐20 are principally based on single equilibrium or kinetic mechanism, which typically leads to limited success.…”

Section: Introductionmentioning

confidence: 99%

Separation of propylene and propane with a microporous metal–organic framework via equilibrium‐kinetic synergetic effect

Ding

Zhang

et al. 2020

AIChE Journal

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Adsorption separation of olefin and paraffin can greatly lower the energy consumption associated with the currently utilized distillation technique but remains a great challenge. Herein, we report the efficient separation of propylene (C3H6) and propane (C3H8) in a phosphate anion‐functionalized metal–organic framework (MOF) ZnAtzPO4 by synergetic effect of equilibrium and kinetics. The material features periodically expanded and contracted apertures decorated with electronegative groups, offering eligible pore shape and pore chemistry to effectively trap C3H6 under moderate isosteric heat of adsorption (27.5 kJ mol−1) while obstruct the diffusion of C3H8. It simultaneously combines excellent thermodynamic selectivity (uptake ratio of 1.71) and kinetic selectivity (~31) for C3H6/C3H8 separation, meanwhile can be easily regenerated. Breakthrough experiment for C3H6/C3H8 gas mixture was conducted and confirmed the outstanding separation capability of ZnAtzPO4. The equilibrium and kinetics cooperative C3H6/C3H8 adsorption separation was for the first time found in anion‐functionalized MOFs, and further confirmed by computational studies.

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Energy-efficient separation alternatives: metal–organic frameworks and membranes for hydrocarbon separation

Abstract: The diversity of metal–organic frameworks enables the design of highly efficient adsorbents and membranes towards hydrocarbon separations for energy consumption mitigation.

Cited by 498 publications

References 256 publications

2D framework materials for energy applications

2D framework materials for energy applications

In Situ Porphyrin Substitution in a Zr(IV)‐MOF for Stability Enhancement and Photocatalytic CO₂ Reduction

Separation of propylene and propane with a microporous metal–organic framework via equilibrium‐kinetic synergetic effect

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Energy-efficient separation alternatives: metal–organic frameworks and membranes for hydrocarbon separation

Abstract: The diversity of metal–organic frameworks enables the design of highly efficient adsorbents and membranes towards hydrocarbon separations for energy consumption mitigation.

Cited by 498 publications

References 256 publications

2D framework materials for energy applications

2D framework materials for energy applications

In Situ Porphyrin Substitution in a Zr(IV)‐MOF for Stability Enhancement and Photocatalytic CO2 Reduction

Separation of propylene and propane with a microporous metal–organic framework via equilibrium‐kinetic synergetic effect

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In Situ Porphyrin Substitution in a Zr(IV)‐MOF for Stability Enhancement and Photocatalytic CO₂ Reduction