Reversed CO2/C2H2 separation via combined adsorption kinetics and diffusion differences in MOF-polymer mixed matrix membrane

Journal of Membrane Science, Journal Year: 2025, Volume and Issue: unknown, P. 123827 - 123827

Published: Feb. 1, 2025

Language: Английский

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Effective Physical Methods for Aflatoxin B1 Removal in Food: A Comprehensive Review

Food Control, Journal Year: 2025, Volume and Issue: unknown, P. 111215 - 111215

Published: Feb. 1, 2025

Language: Английский

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Active Sites Decorated Nonpolar Pore‐Based MOF for One‐step Acquisition of C₂H₄ and Recovery of C₃H₆

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(43)

Published: Sept. 8, 2023

Herein, a 2-fold interpenetrated metal-organic framework (MOF) Zn-BPZ-TATB with accessible N/O active sites in nonpolar pore surfaces was reported for one-step C2 H4 purification from H6 or C3 mixtures as well recovery of /C3 /C2 mixtures. The MOF exhibits the favorable and uptakes (>100 cm3 g-1 at 298 K under 100 kPa) selective adsorption over . - -selective feature were investigated detailedly by experimental tests sorption kinetic studyies. Molecular modelling revealed multiple interactions between molecules methyl groups triazine rings pores. not only can directly generate 323.4 L kg-1 15.4 high-purity (≥99.9 %) mixtures, but also provide large (≥99.5 capacity 60.1 More importantly, productivities 38.2 12.7 be simultaneously obtained through single adsorption/desorption cycle.

Language: Английский

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Ultrastable Carboxyl‐Functionalized Pore‐Space‐Partitioned Metal‐Organic Frameworks for Gas Separation

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(41)

Published: Aug. 15, 2024

Isoreticular chemistry, which enables property optimization by changing compositions without topology, is a powerful synthetic strategy. One of the biggest challenges facing isoreticular chemistry to extend it ligands with strongly coordinating substituent groups such as unbound -COOH, because competitive interactions between and metal ions can derail chemistry. It even more challenging have an series carboxyl-functionalized MOFs capable encompassing chemically disparate ions. Here, simultaneous introduction carboxyl functionalization pore space partition, family materials developed in diverse from homometallic Cr3+ Ni2+ heterometallic Co2+/V3+, Ni2+/V3+, Co2+/In3+, Co2+/Ni2+. Cr-MOFs remain highly crystalline boiling water. Unprecedentedly, one Cr-MOF withstand treatment cycle 10m NaOH 12m HCl, allowing reversible inter-conversion -COOH acid form -COO- base form. These exhibit excellent sorption properties high uptake capacity for CO2 (100.2 cm3 g-1) hydrocarbon gases (e.g., 142.1 g-1 C2H2, 110.5 C2H4) at 1 bar 298K, benzene/cyclohexane selectivity (up ≈40), promising separation performance gas mixtures C2H2/CO2 C2H2/C2H4.

Language: Английский

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Controlling Guest Diffusion by Local Dynamic Motion in Soft Porous Crystals to Separate Water Isotopologues and Similar Gases

Accounts of Chemical Research, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 29, 2024

ConspectusThe precise and effective separation of similar mixtures is one the fundamental issues essential tasks in chemical research. In field gas/vapor separation, size difference among molecular pairs/isomers light hydrocarbons aromatic compounds generally 0.3-0.5 Å, boiling-point 6-15 K. These are necessary industrial raw materials have great demands. Still, their mainly relies on energy-intensive distillation technology. On other hand, remarkably substances such as oxygen/argon isotopologues usually exhibit differences only 0-0.07 Å 1-3 Although can be realized, efficiency considerably low. Therefore, effectively separating crucial chemistry industry, but it remains a significant challenge. Porous coordination polymers (PCPs) or metal-organic frameworks (MOFs) emerging platforms for designing adsorbents mixtures. However, reported PCPs did not work well substances. The framework structures mainstream remain unchanged (rigid) significantly change (globally flexible) upon adsorption. rigid globally flexible find controlling pore aperture subangstrom precision challenging, prerequisite distinguishing Thus, novel mechanisms design principles urgently needed to realize PCPs-based adsorptive mixtures.To confront obstacles mixtures, our group started contributing this 2017. We employed locally platform, whose local motions side substituent groups potentially regulate apertures control diffusion PCPs. Specifically, we encoded dynamic flipping into diffusion-regulatory gate functionality. ligands were designed by integrating carboxylic with nonplanar fused-ring moieties, latter moieties exhibiting motion around equilibrium positions small energy increases. Such lead opening blocking PCP channels, thus termed crystals (FDCs). FDCs feature distinctive temperature-responsive adsorption behaviors due competition thermodynamics kinetics under regulation, enabling differentiation each gate-admission temperature much higher than component. Even when sizes same water isotopologue separate amplifying diffusion-rate differences. Finally, combining thermodynamic kinetic factors, achieve temperature-switched recognition CO

Language: Английский

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Pillar-Layered strategy to design and synthesis of two MOFs with excellent C2H2 capture and C2H2/CO2 separation capability

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 483, P. 149126 - 149126

Published: Feb. 1, 2024

Language: Английский

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Boosting Acetylene Packing Density within an Isoreticular Metal–Organic Framework for Efficient C₂H₂/CO₂ Separation

Chem & Bio Engineering, Journal Year: 2024, Volume and Issue: 1(3), P. 245 - 251

Published: Feb. 1, 2024

Porous solid adsorbents for C2H2/CO2 separation are generally confronted with poor stability, high cost, or regeneration energy, which largely inhibit their industrial implementation. A desired adsorbent material practical implementation should exhibit a good balance between low scale-up production feasibility, and performance. An effective strategy is herein explored based on reticular chemistry through embedding methyl groups in prototype microporous metal-organic framework (MOF) featuring cost stability to effectively separate an mixture. The anchored the pore surfaces could strongly boost C2H2 packing density specifically enhance performance, as distinctly established by single-component gas sorption isotherms. CAU-10-CH3 exhibits excellent of 486 g L-1 adsorption differences CO2 uptake (147%), outperforming benchmark CAU-10-H (392 53%). highly selective over was achieved lower enthalpy (25.18 kJ mol-1) compared that unfunctionalized CAU-10-H. In addition, dynamic column breakthrough experiments further confirm CAU-10-CH3's efficient performance accomplishes scale-up, separation, establishing its promise This approach facilitate development advanced MOF address challenging processes. Thus, this study paves route implementations materials field.

Language: Английский

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Reverse Separation of Carbon Dioxide and Acetylene in Two Isostructural Copper Pyridine‐Carboxylate Frameworks

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(30)

Published: May 13, 2024

Separating acetylene from carbon dioxide is important but highly challenging due to their similar molecular shapes and physical properties. Adsorptive separation of can directly produce pure hardly realized because relatively polarizable binds more strongly. Here, we reverse the CO

Language: Английский

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A pillar-layered MOF bearing N/O sites for one-step purification of C2H4 from the mixtures with C2H6 or C3H6

Separation and Purification Technology, Journal Year: 2025, Volume and Issue: unknown, P. 132141 - 132141

Published: Feb. 1, 2025

Language: Английский

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Benchmarking selective capture of trace CO2 from C2H2 using an amine-functionalized adsorbent

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: March 16, 2025

Purifying C2H2 by removing trace CO2 is critically needed yet challenged their analogous physical properties. Herein, we report a commercial resin adsorbent HP20 (Diaion® HP-20 Resin) loaded with polyethyleneimine (PEI@HP20) which selectively captures and excludes C2H2. PEI@HP20 possesses high adsorption capacity (4.35 mmol/g) at 100 kPa 298 K record CO2/C2H2 uptake ratio compared all reported CO2-selective adsorbents. The ideal adsorbed solution theory selectivity reaches 1.33×107. pilot-scale pressure-temperature swing on 2 kg further validated that it can obtain >99.99% purity from CO2/C2H2(1/99, v/v) mixtures yield of 344.7 g per cycle. combination multinuclear solid-state Nuclear Magnetic Resonance, Fourier Transform infrared spectroscopy density functional calculations reveal the performance relies dual chemisorption/physisorption mechanism. This work highlights promising method to develop green, low cost, efficiency, readily scalable adsorbent. but challenging due authors production for selective capture traces exclusion

Language: Английский

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