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.
keywords
GAS-TRANSPORT PROPERTIES; CARBON-DIOXIDE CAPTURE; COMPOSITE MEMBRANES; HOLLOW FIBERS; PERFORMANCE; POLYMERS; TECHNOLOGIES; DIFFUSION; HYDROGEN; RECYCLE
subject category
Chemistry; Science & Technology - Other Topics; Engineering
authors
Silva, LP; Qasem, E; Upadhyaya, L; Esposito, R; Górecki, R; Coutinho, JAP; Carvalho, PJ; Nunes, SP
our authors
Liliana Patrocínio da Silva
Collaborator
Pedro J. Carvalho
Assistant Professoracknowledgements
The work has been supported by King Abdullah University of Science and Technology (KAUST). TOC and Cover art were created by Heno Hwang, a scientific illustrator at KAUST.