Constructing Ether-Rich and Carboxylate Hydrogen Bonding Sites in Protic Ionic Liquids for Efficient and Simultaneous Membrane Separation of H2S and CO2 from CH4

Green Energy & Environment, Journal Year: 2024, Volume and Issue: unknown

Published: May 1, 2024

Removing H2S and CO2 is of great significance for natural gas purification. With excellent affinity tunable structure, ionic liquids (ILs) have been regarded as nontrivial candidates fabricating polymer-based membranes. Herein, we firstly reported the incorporation protic ILs (PILs) having ether-rich carboxylate sites (ECPILs) into poly(ether-block-amide) (Pebax) matrix efficient separation from CH4. Notably, optimal permeability reaches up to 4310 Barrer (40 ºC, 0.50 bar) in Pebax/ECPIL membranes, along with H2S/CH4 (H2S+CO2)/CH4 selectivity 97.7 112.3, respectively. These values are increased by 1125%, 160.8% 145.9% compared those neat Pebax membrane. Additionally, solubility diffusion coefficients gases were measured, demonstrating that ECPIL can simultaneously strengthen dissolution CO2, thus elevating permselectivity. By using quantum chemical calculations FT-IR spectroscopy, highly reversible multi-site hydrogen bonding interaction between ECPILs was revealed, which responsible fast permeation good selectivity. Furthermore, H2S/CO2/CH4 (3/3/94 mol%) ternary mixed be efficiently stably separated membrane at least 100 h. Overall, this work not only illustrates PILs outstanding materials simultaneous removal but may also provide a novel insight design upgrading.

Language: Английский

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Rational design of deep eutectic solvents with low viscosities and multiple active sites for efficient recognition and selective capture of NH₃

Smart Molecules, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 5, 2025

Abstract Efficient recognition and selective capture of NH 3 is not only beneficial for increasing the productivity synthetic industry but also reducing air pollution. For this purpose, a group deep eutectic solvents (DESs) consisting glycolic acid (GA) phenol (PhOH) with low viscosities multiple active sites was rationally designed in work. Experimental results show that GA + PhOH DESs display extremely fast absorption rates (within 51 s equilibrium) high solubility. At 313.2 K, capacities (1:1) reach 6.75 mol/kg (at 10.7 kPa) 14.72 201.0 kPa). The solubility at pressures were minimally changed after more than 100 days exposure. In addition, remain highly stable 10 consecutive absorption‐desorption cycles. More importantly, can be selectively captured by from /CO 2 /N /H mixtures. 1 H‐NMR, Fourier transform infrared theoretical calculations performed to reveal intrinsic mechanism efficient DESs.

Language: Английский

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Absorption characteristics of ammonia by ImFSA-based low melting mixtures: Experimental study and computational analysis

Journal of Molecular Liquids, Journal Year: 2025, Volume and Issue: 432, P. 127735 - 127735

Published: May 5, 2025

Language: Английский

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Quaternary and its sub-ternary systems of 4-formylbenzoic acid + p-toluic acid + p-phthalic acid + N,N-dimethylformamide: Phase diagrams and DFT studies on adduct of p-phthalic acid with N,N-dimethylformamide

The Journal of Chemical Thermodynamics, Journal Year: 2025, Volume and Issue: unknown, P. 107514 - 107514

Published: May 1, 2025

Language: Английский

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Mesoporous polymer supported Metal-Based deep eutectic solvents for enhanced capture of Low-Content Ammonia

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 493, P. 152562 - 152562

Published: May 26, 2024

Language: Английский

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Ammonia Storage Performance of Thiocyanate-Based Pseudo Ionic Liquids: Experimental Study and Computational Chemistry Analysis

Sustainable Energy & Fuels, Journal Year: 2024, Volume and Issue: 8(17), P. 3933 - 3943

Published: Jan. 1, 2024

A series of novel thiocyanate-based phase-change pseudo ionic liquids (PILs) with excellent renewability have been designed for ammonia absorption and storage.

Language: Английский

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