Encapsulated Amino Acid-Based Ionic Liquid for CO2 Separation Membranes

Liliana P. Silva; Eyad Qasem; Lakshmeesha Upadhyaya; Rebecca Esposito; Radosław Górecki; João A.P. Coutinho; Pedro J. Carvalho; Suzana P. Nunes

doi:10.1021/acssuschemeng.3c05135

Encapsulated Amino Acid-Based Ionic Liquid for CO₂ Separation Membranes

Liliana P. Silva, Eyad Qasem, Lakshmeesha Upadhyaya, Rebecca Esposito, Radosław Górecki, João A.P. Coutinho, Pedro J. Carvalho^*, Suzana P. Nunes^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

Membrane technology has been valuable for the transition to a fully sustainable economy. We demonstrate the application of amino-acid-based ionic liquids integrated into polymeric membranes for the preferential transport of carbon dioxide (CO₂). This material has a high absorption capacity for CO₂, increasing its solubility in the membrane and, consequently, permeability. The amino-acid-based ionic liquid is encapsulated in porous carbon capsules to avoid leaching out during the membrane operation. The selective layer polymer matrix was constituted by Pebax1657. The addition of 1 wt % of encapsulated amino-acid-base ionic liquid led to a more than 2-fold permeability enhancement while maintaining the ideal selectivity for CO₂ over other light gases. The permeability was even higher when tested with humid mixed gases without compromising the selectivity.

Original language	English (US)
Pages (from-to)	300-309
Number of pages	10
Journal	ACS Sustainable Chemistry and Engineering
Volume	12
Issue number	1
DOIs	https://doi.org/10.1021/acssuschemeng.3c05135
State	Published - Jan 8 2024

Keywords

amino-acid-based ionic liquids
carbon capsules
carbon dioxide separation
composite membranes
Pebax1657

ASJC Scopus subject areas

General Chemistry
Environmental Chemistry
General Chemical Engineering
Renewable Energy, Sustainability and the Environment

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1021/acssuschemeng.3c05135

Cite this

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title = "Encapsulated Amino Acid-Based Ionic Liquid for CO2 Separation Membranes",

abstract = "Membrane technology has been valuable for the transition to a fully sustainable economy. We demonstrate the application of amino-acid-based ionic liquids integrated into polymeric membranes for the preferential transport of carbon dioxide (CO2). This material has a high absorption capacity for CO2, increasing its solubility in the membrane and, consequently, permeability. The amino-acid-based ionic liquid is encapsulated in porous carbon capsules to avoid leaching out during the membrane operation. The selective layer polymer matrix was constituted by Pebax1657. The addition of 1 wt % of encapsulated amino-acid-base ionic liquid led to a more than 2-fold permeability enhancement while maintaining the ideal selectivity for CO2 over other light gases. The permeability was even higher when tested with humid mixed gases without compromising the selectivity.",

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AU - Silva, Liliana P.

AU - Qasem, Eyad

AU - Upadhyaya, Lakshmeesha

AU - Esposito, Rebecca

AU - Górecki, Radosław

AU - Coutinho, João A.P.

AU - Carvalho, Pedro J.

AU - Nunes, Suzana P.

PY - 2024/1/8

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AB - Membrane technology has been valuable for the transition to a fully sustainable economy. We demonstrate the application of amino-acid-based ionic liquids integrated into polymeric membranes for the preferential transport of carbon dioxide (CO2). This material has a high absorption capacity for CO2, increasing its solubility in the membrane and, consequently, permeability. The amino-acid-based ionic liquid is encapsulated in porous carbon capsules to avoid leaching out during the membrane operation. The selective layer polymer matrix was constituted by Pebax1657. The addition of 1 wt % of encapsulated amino-acid-base ionic liquid led to a more than 2-fold permeability enhancement while maintaining the ideal selectivity for CO2 over other light gases. The permeability was even higher when tested with humid mixed gases without compromising the selectivity.

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KW - carbon dioxide separation

KW - composite membranes

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