Robust microporous hydrogen−bonded organic framework for highly selective purification of methane from natural gas

Cai, Youlie; Chen, Hongwei; Liu, Puxu; Chen, Jiazhen; Xu, Hui; Alshahrani, Thamraa; Li, Libo; Chen, Banglin; Gao, Junkuo

doi:10.1016/j.micromeso.2023.112495

Cited by 45 publications

(16 citation statements)

References 60 publications

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“…When the temperature was increased to 298 K, the adsorbed amounts of each adsorbent decreased to 3.8, 18.2, 36.8, 60.6, 51.7, and 48.4 cm 3 g –1 . Due to the relatively suitable pore size, the C 2 H 2 uptake of HOF-ZSTU-4a was significantly higher than HOF-FJU-1a (43 cm 3 g –1 ), SOF-1a (50 cm 3 g –1 ), BNF-1a (32.8 cm 3 g –1 ), and HOF-3a (47 cm 3 g –1 ), which was comparable to HOF-16a (60 cm 3 g –1 ) and HOF BTB (64.3 cm 3 g –1 ) (Figure a) . Notably, several HOFs with larger pore sizes have low uptake due to insufficient confinement of C 2 H 2 by the pore environment, e.g., HOF-TCBP (34.4 cm 3 g –1 ) and PFC-2 (47.9 cm 3 g –1 ) .…”

Section: Resultsmentioning

confidence: 82%

A Solid-State Transformation of Hydrogen-Bonded Organic Frameworks for Efficient Acetylene Storage and Gas Separation

Cai,

Zheng,

Chen

et al. 2024

Chem Bio Eng.

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Developing robust microporous hydrogen-bonded organic frameworks (HOFs) is crucial for exploring novel physical adsorbents and revealing the structure–property relationship of hydrogen-bonding pairing behaviors. However, it is still challenging to obtain dense and stable hydrogen-bonded frameworks due to the rigidity and spatial resistance of the tectonic centers. Herein, we report a robust microporous HOF (HOF-ZSTU-4) via 4,4′,4′,4″-([1,1′-biphenyl]-4,4′-diylbis(azanetriyl))tetrabenzoic acid (H4BDATB) with flexible nitrogen nodes composing the tectonic center. Single-crystal X-ray diffraction (SCXRD) analysis shows that the activated framework undergoes a solid-to-solid phase transition because of the torsion of the carboxyl–carboxyl dimer, leading to the switching of the framework from the sql topology to the cds topology (HOF-ZSTU-4a). The single-component gas sorption isotherm reveals that HOF-ZSTU-4a has a C2H2 packing density of 0.54 kg L–1, marking it as the most efficient among reported HOFs. In addition, HOF-ZSTU-4a exhibits promising separation selectivity for several binary gas mixtures, and the dynamic separation performance for C2H2/CO2, CO2/N2, and CH4/N2 is verified by dynamic breakthrough experiments.

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Section: Resultsmentioning

confidence: 82%

A Solid-State Transformation of Hydrogen-Bonded Organic Frameworks for Efficient Acetylene Storage and Gas Separation

Cai,

Zheng,

Chen

et al. 2024

Chem Bio Eng.

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“…Isotherms can reflect the adsorption−desorption properties of the material. The adsorption properties of porous nanomaterials on C 2 H 2 were investigated in detail by gas adsorption isotherms by Cai et al 153 However, a large hysteresis ring is usually undesirable because it means that a lot of energy is needed to dehydrate the adsorbent. For MOF materials used for water adsorption, it is necessary to select the best adsorbent according to the specific RH to achieve low energy loss and high efficiency of moisture adsorption.…”

Section: Adsorption Mechanisms and Performance Assessmentmentioning

confidence: 99%

Optimization Strategies of the Design and Preparation of Metal–Organic Framework Nanostructures for Water Sorption: A Review

Yan

Huo

Pan

2023

ACS Appl. Nano Mater.

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Metal–organic frameworks (MOFs) as popular nanomaterials have outstanding application prospects in water sorption applications due to their unique structures with excellent properties, such as high porosity, large specific surface area, nanoscale features, reticulation structure, and controllable adjustment of the pore size. Sorbents require high water sorption and water stability to collect, utilize, or remove water. The structure of most MOFs is destroyed upon contact with water, which greatly limits their practical application. This paper summarizes the internal mechanism of water-stable MOFs and describes the optimal design strategy of water-stabilized MOFs based on the structural design of water-stabilized MOFs and the modification of existing MOFs. This review summarizes and analyzes the current typical MOF synthesis and preparation methods. Solutions are proposed for the problems of MOFs in terms of the synthesis mechanism, mass production, and application, and the manufacturing strategies and long-term reliability of MOFs are also prospected. The water sorption mechanism of water-stable MOFs and the influencing factors of water sorption behavior are described, and the optimization strategy of the water sorption performance of MOFs is proposed in terms of the microstructure, surface functional groups, and electron group hybridization. Meanwhile, the current challenges are summarized according to the characteristics of water-adsorbing MOFs, and the future development of MOFs are prospected. It is expected to provide a valuable reference for the research direction of the application of MOFs in water sorption.

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“…Presently, human’s dependence on fossil energy causes excessive emissions of greenhouse gas especially carbon dioxide (CO 2 ) and leads to irreversible climate change. − Thus, new clean energy sources are urgently desired to alleviate this excessive carbon emission. Natural gas is a significant clean energy source that is mainly composed of CH 4 which endows it with a high hydrogen to carbon ratio and high energy density of 55.5 MJ·kg –1 . − Besides, raw natural gas also contains a small quantity (∼20%) of variable amounts of impurities, such as C 2 H 6 , C 3 H 8 , and so forth. − Among them, C 2 H 6 and C 3 H 8 are usually used as the feedstocks to produce higher value-added olefins (C 2 H 4 and C 3 H 6 ), which are usually used as the building blocks to synthesize polyethylene or polypropylene-based materials. − Consequently, separating natural gas to obtain high-purity CH 4 and other remaining alkanes is of great importance to realize the efficient utilization of natural gas. Nowadays, the upgrading and purification techniques of light hydrocarbons are mainly achieved by extraction and cryogenic distillation, requiring large energy consumption that does not match the requirements of sustainable development.…”

Section: Introductionmentioning

confidence: 99%

Robust Two-Dimensional Hydrogen-Bonded Organic Framework for Efficient Separation of C1–C3 Alkanes

Zhou,

Zhu,

Song

et al. 2024

Chem Bio Eng.

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Robust microporous hydrogen−bonded organic framework for highly selective purification of methane from natural gas

Cited by 45 publications

References 60 publications

A Solid-State Transformation of Hydrogen-Bonded Organic Frameworks for Efficient Acetylene Storage and Gas Separation

A Solid-State Transformation of Hydrogen-Bonded Organic Frameworks for Efficient Acetylene Storage and Gas Separation

Optimization Strategies of the Design and Preparation of Metal–Organic Framework Nanostructures for Water Sorption: A Review

Robust Two-Dimensional Hydrogen-Bonded Organic Framework for Efficient Separation of C1–C3 Alkanes

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