Recovery of High-Purity SF₆ from Humid SF₆/N₂ Mixture within a Co(II)-Pyrazolate Framework

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(28), С. 19303 - 19309

Опубликована: Июль 6, 2024

Sulfur hexafluoride (SF

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Anaerobic oxidation of methane driven by different electron acceptors: A review

The Science of The Total Environment, Год журнала: 2024, Номер 946, С. 174287 - 174287

Опубликована: Июнь 28, 2024

Язык: Английский

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Metal Hydrogen-Bonded Organic Frameworks as Open Lewis Acid Catalysts for Two Types of CO₂ Transformations

Inorganic Chemistry, Год журнала: 2024, Номер 63(25), С. 11554 - 11565

Опубликована: Май 30, 2024

Efficient and multiple CO2 utilization into high-value-added chemicals holds significant importance in carbon neutrality industry production. However, most catalysis systems generally exhibit only one type of transformation with the efficiency to be improved. The restricted abundance active catalytic sites or an inefficient rate these results constraint. Consequently, we designed constructed two metal hydrogen-bonded organic frameworks (M-HOFs) {[M3(L3–)2(H2O)10]·2H2O}n (M = Co (1), Ni (2); L 1-(4-carboxyphenyl)-1H-pyrazole-3,5-dicarboxylic acid) this research. 1 2 are well-characterized, both show excellent stability. networks connected by hydrogen bonds enhance structural flexibility create accessible Lewis acidic sites, promoting interactions between substrates centers. This enhancement facilitates efficient for types transformations, encompassing cycloaddition reactions epoxides aziridines afford cyclic carbonates oxazolidinones. activities (TON/TOF) superior compared those other catalysts. These heterogeneous catalysts still exhibited high performance after being reused several times. Mechanistic studies indicated intense substrates, demonstrating reason catalysis. marks first instance on M-HOFs efficiently catalyzing conversions, finding important significance catalyst design utilization.

Язык: Английский

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Engineering nano-trap distribution in metal-organic frameworks enables boost of SF6/N2 separation

Green Chemical Engineering, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Язык: Английский

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Nanopore Microenvironment Regulation of a Self-Supporting Cellulose-Based Porous Carbon Fiber Cloth by Homogeneous One-Step Activation for Hydrogen Storage and Carbon Dioxide Capture

ACS Applied Nano Materials, Год журнала: 2025, Номер 8(6), С. 2997 - 3008

Опубликована: Янв. 31, 2025

Porous carbon fiber materials designed for hydrogen storage and dioxide capture under ambient pressure have garnered significant research interest due to their safety, high efficiency, simplicity. However, traditional activation processes compromise the nanopore microenvironment composed of surface chemical structure, multistage mechanical self-supporting properties porous excessive pore-making etching action, hindering practical application. To address this, a flexible cloth (POACF-P30-900) with structure (VMicro = 0.468 cm3/g VMeso 0.712 cm3/g), specific area (SBET 1727 m2/g), abundant P/O functional groups was constructed by simple homogeneous one-step process. Under interface dipole-induced interaction POACF-P30-900 presents an excellent reversible capacity 2.16 wt % at 1 bar 77 K CO2 14.2 298 bar. This study proposes scalable construction strategy cloth, advancing large-scale application solid-state adsorption materials.

Язык: Английский

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Enhancing Selective Hydrofluorocarbon Greenhouse Gas Capture via Halogenation of Metal–Organic Frameworks

Journal of the American Chemical Society, Год журнала: 2025, Номер unknown

Опубликована: Фев. 16, 2025

Hydrofluorocarbons (HFCs) are anthropogenically produced greenhouse gases with longer atmospheric lifetimes and higher global warming potentials than those of carbon dioxide. General strategies to abate their emissions from industrial point sources, such as via adsorptive capture, remain scarce. Herein, we uncover the key structure–property relationships that lead strong binding HFCs fluoroform (CHF3) difluoromethane (CH2F2) in metal–organic frameworks (MOFs) under low pressures relevant flue gas scrubbing. Extensive sorption computational studies support Zr-based microporous framework MOF-801-Br or HHU-2-Br (HHU = Heinrich-Heine-University Düsseldorf) strongly binds due its synergistic combination Zr-OH sites on nodes bromine linkers. As such, demonstrates a record-setting performance for separating CHF3 N2 dilute conditions. Our work highlights multiple hydrogen-bonding MOFs represents generalizable strategy HFC enabling selective removal waste streams.

Язык: Английский

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Structuring of a Porous Aluminum Metal–Organic Framework for Selective CH₄/N₂ Separation

Industrial & Engineering Chemistry Research, Год журнала: 2025, Номер 64(9), С. 5018 - 5027

Опубликована: Фев. 20, 2025

Metal–organic frameworks (MOFs) hold great potential as materials for the separation of gas mixtures. To effectively use MOFs an adsorbent dynamic and liquid mixtures, they must be formulated shaped into a mechanically stable bead or pellet form. This study focuses on synthesis MIL-53(Al)-FA in form beads pellets. The MOF are produced using alginic acid binder calcium chloride gelling agent, pellets formed through mechanical pressing. Different physicochemical techniques, such powder X-ray diffraction, Fourier-transform infrared spectroscopy (FTIR), thermal gravimetric analysis, scanning electron microscopy were used characterization synthesized adsorption uptake capacity CH4 N2 gases was measured from 1 to 10 bar pressure at 298 313 K, respectively. isotherm data both adsorbates evaluated by dual site Langmuir equations. Additionally, selectivity over binary feed mixture predicted ideal adsorbed solution theory. Breakthrough experiments performed with adsorbents CH4/N2 mixtures (30:70 50:50 v/v). These conducted under various flow rates, pressures, temperatures. exhibited comparable (5.34) higher (1 mmol/g) compared those pellets, which showed 5.74 0.71 mmol/g same conditions. mainly due ratio coadsorption N2. lower length unused bed case (7.30 cm) leads than that (13.30 cm).

Язык: Английский

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Cu(II)–Organic Framework for Carboxylative Cyclization of Propargylic Amines with CO₂

Inorganic Chemistry, Год журнала: 2024, Номер 63(36), С. 16878 - 16887

Опубликована: Авг. 27, 2024

Effective CO

Язык: Английский

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Molecular Weaving towards Flexible Covalent Organic Framework Membranes for Efficient Gas Separations

Angewandte Chemie International Edition, Год журнала: 2024, Номер unknown

Опубликована: Окт. 8, 2024

Abstract Covalent organic frameworks (COFs) exhibit considerable potential in gas separations owing to their remarkable stability and tunable pore structures. Nevertheless, application as separation membranes is hindered by limited size‐sieving capabilities poor processability. In this study, we propose a novel molecular weaving strategy that combines hydroxyl polymers 2D TpPa−SO 3 H COF nanosheets, achieving high efficiency. Driven the strong electrostatic interactions, chains thread through pores, effectively assembling composites achieve exceptional flexibility mechanical strength. The penetrated also reduce effective size of COFs, combined with “secondary confinement effect” stemming from abundant CO 2 sorption sites channels, PVA@TpPa−SO membrane demonstrates permeance 1267.3 GPU an /CO selectivity 43, surpassing 2008 Robson upper bound limit. This facile holds promise for manufacture large‐area COF‐based small‐sized separations.

Язык: Английский

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Greenhouse sulfur hexafluoride gas capture and separation using emerging porous solids

Coordination Chemistry Reviews, Год журнала: 2024, Номер 515, С. 215958 - 215958

Опубликована: Май 23, 2024

Язык: Английский

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