Industrial & Engineering Chemistry Research, Год журнала: 2025, Номер unknown
Опубликована: Янв. 7, 2025
Metal–organic frameworks (MOFs) are a rapidly growing class of crystalline porous materials known for their high surface area and tunable porosity, making them ideal various applications, including gas separation. While the utility MOFs primarily stems from intrinsic micropores, fabricating MOF-based membranes further enhances applicability, particularly in CO2 separation flue (CO2/N2) natural (CO2/CH4). In this work, we developed an situ synthesis method to fabricate MIL-160 on ceramic tubular substrates MIL-160, with its three-dimensional interconnected channels pore-limiting diameter 4.3 Å, is well-suited separating small molecules. Through multiple trials, produced distinct crystal morphologies─ball, flake, cuboid─and characterized using X-ray diffraction, scanning electron microscopy, nitrogen physisorption, adsorption, thermogravimetric analysis, confocal microscopy. The morphology was found significantly influence membrane quality, reducing grain boundaries pinholes. Confocal microscopy revealed substantial defects ball- flake-shaped membranes, while cuboid-shaped showed minimal dye infiltration, indicating fewer more uniform structure. Single-gas permeation tests confirmed superior performance membrane, achieving CO2/N2 CO2/CH4 selectivities 56.8 130, respectively, permeance 75.5 GPU. mixed-gas tests, reached selectivity 259 at XCO2 = 0.5, 224 0.2. Additionally, molecular simulations binary adsorption supported these findings, demonstrating competitive presence N2 CH4. This study highlights potential as scalable effective solution removal gas.
Язык: Английский
Процитировано
0Integration of ordered porous materials for targeted three-component gas separation
Nature Communications, Год журнала: 2025, Номер 16(1)
Опубликована: Янв. 15, 2025
Separation of multi-component mixtures in an energy-efficient manner has important practical impact chemical industry but is highly challenging. Especially, targeted simultaneous removal multiple impurities to purify the desired product one-step separation process extremely difficult task. We introduced a pore integration strategy modularizing ordered structures with specific functions for on-demand assembly deal complex systems, which are unattainable by each individual pore. As proof concept, two ultramicroporous nanocrystals (one C2H2-selective and other CO2-selective) as shell pores were respectively grown on C2H6-selective porous material core Both respective pore-integrated materials show excellent ethylene production performance dynamic breakthrough experiments C2H2/C2H4/C2H6 CO2/C2H4/C2H6 gas mixture, even better than that from traditional tandem-packing processes originated optimized mass/heat transfer. Thermodynamic simulation results explained pre-designed modules can perform target independently materials. Pore offers approach assembling demand achieve mixtures.
Язык: Английский
Процитировано
0Alkali Metal-Functionalized Covalent Organic Frameworks for CO2 Adsorption and CO2/N2 Separation
ACS Applied Polymer Materials, Год журнала: 2025, Номер unknown
Опубликована: Янв. 16, 2025
Covalent organic frameworks (COFs) have become potential candidates for gas purification technology, especially in carbon capture and storage applications. By utilizing strategies such as pore structure design functional modification, COFs been developed to exhibit high selectivity superior adsorption capacity the effective separation of CO2 from industrial waste gases. Notably, alkali metals strong interactions with backbone COFs, which can enhance CO2/N2 performance these porous materials. This study details synthesis two-dimensional COF materials modified acidic groups (TpPa-COOH TpPa-SO3H) via mechanical grinding. Alkali Na, Li, K were introduced into through simple ion exchange reactions, thereby creating metal-modified The impact various on was investigated. Among resulting products, lithiated TpPa-COOH showed highest 2.65 mmol/g at 273 1 bar. may be due smaller atomic size Li that offers larger space. Under same conditions, K-modified TpPa-SO3H exhibited 548, surpasses most reported literature. caused by polarization triggered metals. inference further confirmed computational simulations. work provides a facile method modification achieve performance.
Язык: Английский
Процитировано
0Melamine-based hydrogen-bonded organic nanoframework for metal ion adsorption and antibacterial applications
Colloids and Surfaces C Environmental Aspects, Год журнала: 2025, Номер unknown, С. 100059 - 100059
Опубликована: Янв. 1, 2025
Язык: Английский
Процитировано
0Zif-8 Membranes for Highly Efficient Sf6 Recovery
Опубликована: Янв. 1, 2025
Язык: Английский
Процитировано
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