Ultrathin Composite Polymeric Membranes for CO2/N2 Separation with Minimum Thickness and High CO2 Permeance

Benito, Javier González; Sánchez‐Laínez, Javier; Zornoza, Beatriz; Martı́n, Santiago; Carta, Mariolino; Malpass‐Evans, Richard; Téllez, Carlos; McKeown, Neil B.; Coronas, Joaquı́n; Gascón, Ignacio

doi:10.1002/cssc.201701139

Cited by 41 publications

(25 citation statements)

References 15 publications

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“…Comparing these data to previous studies, where different polymers of intrinsic microporosity (PIMs) were deposited onto PTMSP substrates, it can be highlighted that the CO 2 permeance values obtained with 30 C 12 RhMOP monolayers deposited onto PTMSP (195 GPU at 1 bar) are significantly higher than those obtained when stacking the same number of PIM monolayers (134 GPU for PIM‐TMN‐Trip films and 118 GPU for PIM‐EA‐TB(H 2 )). However, CO 2 /N 2 selectivity values are slightly lower for MOP supported films (10.1) than for PIM‐TMN‐Trip (12.1) and PIM‐EA‐TB(H 2 ) (13.8) supported films. This tendency is somehow expected as the higher is the permeability for a membrane, the lower is generally the selectivity.…”

Section: Figurementioning

confidence: 89%

Ultrathin Films of Porous Metal–Organic Polyhedra for Gas Separation

Andrés

Carné‐Sánchez

Sánchez‐Laínez

et al. 2019

Chemistry A European J

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Ultrathin films of a robust RhII‐based porous metal–organic polyhedra (MOP) have been obtained. Homogeneous and compact monolayer films (ca. 2.5 nm thick) were first formed at the air–water interface, deposited onto different substrates and characterized using spectroscopic methods, scanning transmission electron microscopy and atomic force microscopy. As a proof of concept, the gas separation performance of MOP‐supported membranes has also been evaluated. Selective MOP ultrathin films (thickness ca. 60 nm) exhibit remarkable CO2 permeance and CO2/N2 selectivity, demonstrating the great combined potential of MOP and Langmuir‐based techniques in separation technologies.

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Section: Figurementioning

confidence: 89%

Ultrathin Films of Porous Metal–Organic Polyhedra for Gas Separation

Andrés

Carné‐Sánchez

Sánchez‐Laínez

et al. 2019

Chemistry A European J

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“…Bernardo et al [15] developed thin film composite based on PIM-EA(H 2 )-TB and they studied the impact of the residual casting solvent on the separation performance at 25 °C and 1 bar. In addition, Benito et al [19] studied composite membranes based on a ultrathin layer of PIM-EA(H 2 )-TB for CO 2 /N 2 separation at 35 °C and 3 bar.…”

Section: Introductionmentioning

confidence: 99%

Temperature and Pressure Dependence of Gas Permeation in a Microporous Tröger’s Base Polymer

et al. 2018

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Gas transport properties of PIM-EA(H2)-TB, a microporous Tröger’s base polymer, were systematically studied over a range of pressure and temperature. Permeability coefficients of pure CO2, N2, CH4 and H2 were determined for upstream pressures up to 20 bar and temperatures up to 200 °C. PIM-EA(H2)-TB exhibited high permeability coefficients in absence of plasticization phenomena. The permeability coefficient of N2, CH4 and H2 increased with increasing temperature while CO2 permeability decreased with increasing temperature as expected for a glassy polymer. The diffusion and solubility coefficients were also analysed individually and compared with other polymers of intrinsic microporosity. From these results, the activation energies of permeation, diffusion and sorption enthalpies were calculated using an Arrhenius equation.

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“…In the present paper, we study the properties of a blend membrane based on the highly permeable PIM-EA(H 2 )-TB [37,38,39,40] and the highly selective Matrimid ® 5218 (Figure 1). PIM-EA(H 2 )-TB is a member of the new class of PIMs consisting of Tröger’s Base and ethanoanthracene (EA), forming a particularly rigid polymer backbone.…”

Section: Introductionmentioning

confidence: 99%

Highly Permeable Matrimid®/PIM-EA(H2)-TB Blend Membrane for Gas Separation

et al. 2018

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The effect on the gas transport properties of Matrimid®5218 of blending with the polymer of intrinsic microporosity PIM-EA(H2)-TB was studied by pure and mixed gas permeation measurements. Membranes of the two neat polymers and their 50/50 wt % blend were prepared by solution casting from a dilute solution in dichloromethane. The pure gas permeability and diffusion coefficients of H2, He, O2, N2, CO2 and CH4 were determined by the time lag method in a traditional fixed volume gas permeation setup. Mixed gas permeability measurements with a 35/65 vol % CO2/CH4 mixture and a 15/85 vol % CO2/N2 mixture were performed on a novel variable volume setup with on-line mass spectrometric analysis of the permeate composition, with the unique feature that it is also able to determine the mixed gas diffusion coefficients. It was found that the permeability of Matrimid increased approximately 20-fold with the addition of 50 wt % PIM-EA(H2)-TB. Mixed gas permeation measurements showed a slightly stronger pressure dependence for selectivity of separation of the CO2/CH4 mixture as compared to the CO2/N2 mixture, particularly for both the blended membrane and the pure PIM. The mixed gas selectivity was slightly higher than for pure gases, and although N2 and CH4 diffusion coefficients strongly increase in the presence of CO2, their solubility is dramatically reduced as a result of competitive sorption. A full analysis is provided of the difference between the pure and mixed gas transport parameters of PIM-EA(H2)-TB, Matrimid®5218 and their 50:50 wt % blend, including unique mixed gas diffusion coefficients.

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Ultrathin Composite Polymeric Membranes for CO₂/N₂ Separation with Minimum Thickness and High CO₂ Permeance

Cited by 41 publications

References 15 publications

Ultrathin Films of Porous Metal–Organic Polyhedra for Gas Separation

Ultrathin Films of Porous Metal–Organic Polyhedra for Gas Separation

Temperature and Pressure Dependence of Gas Permeation in a Microporous Tröger’s Base Polymer

Highly Permeable Matrimid®/PIM-EA(H2)-TB Blend Membrane for Gas Separation

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