Dataset Information

Hybrid Ionic Liquid Capsules for Rapid CO₂ Capture.

ABSTRACT: The CO₂ absorption by ionic liquids (ILs) were enhanced by the use of hybrid capsules composed of a core of IL and shell of polyurea and alkylated graphene oxide (GO). These composite structures were synthesized using a Pickering emulsion as a template and capsules of two different ILs were prepared. The contribution of the encapsulated IL on the CO₂ absorption of the capsules is consistent with agitated neat IL, but with improved kinetics of absorption across different pressures. This novel materials design allows for CO₂ to be absorbed significantly faster compared to bulk IL and provides insight into improved carbon capture technologies.

SUBMITTER: Huang Q

PROVIDER: S-EPMC7837423 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature

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Hybrid Ionic Liquid Capsules for Rapid CO2 Capture.

Huang Qianwen Q Luo Qinmo Q Wang Yifei Y Pentzer Emily E Gurkan Burcu B

Industrial & engineering chemistry research 20190524 24

The CO2 absorption by ionic liquids (ILs) were enhanced by the use of hybrid capsules composed of a core of IL and shell of polyurea and alkylated graphene oxide (GO). These composite structures were synthesized using a Pickering emulsion as a template and capsules of two different ILs were prepared. The contribution of the encapsulated IL on the CO2 absorption of the capsules is consistent with agitated neat IL, but with improved kinetics of absorption across different pre ...[more]

PMID: 33505108

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Project description:Global warming is arguably the biggest scientific challenge of the twenty-first century and its environmental consequences are already noticeable. To mitigate the emissions of greenhouse gases, particularly of CO2, there is an urgent need to design materials with improved adsorbent properties. Five different magnetic ionic liquids were impregnated into the metal-organic framework ZIF-8. The composites were produced by a direct-contact method, and their performance as sorbents for gas separation applications was studied. The impact of the ionic liquid anion on the sorption capacity and ideal CO2/CH4 and CO2/N2 selectivities were studied, focusing on understanding the influence of metal atom and ligand on the adsorbent properties. Reproducible methodology, along with rigorous characterization, were established to assess the impact of the ionic liquid on the performance of the composite materials. Results show that the ionic liquid was well-impregnated, and the ZIF-8 structure was maintained after ionic liquid impregnation. The produced composites were of microporous nature and were thermally stable. CO2, CH4, and N2 adsorption-desorption isotherms were obtained at 303 K and between 0 and 16 bar. The adsorption-desorption data of the composites were compared with that obtained for original ZIF-8. The general trend in composites is that the increased gas uptake per available pore volume compensates the pore volume loss. Adsorption data per unit mass showed that composites have reversible sorption, but inferior gas uptake at all pressure ranges. This is due to the observed total pore volume loss by the ionic liquid pore occupation/blockage. In most cases, composites showed superior selectivity performance at all pressure range. In particular, the composite [C4MIM]2[MnCl4]@ZIF-8 shows a different low-pressure selectivity trend from the original MOF, with a 33% increase in the CO2/N2 selectivity at 1 bar and 19% increase in the CO2/CH4 selectivity at 10 bar. This material shows potential for use in a post-combustion CO2 capture application that can contribute to greenhouse gas mitigation.

Dataset Information

Hybrid Ionic Liquid Capsules for Rapid CO₂ Capture.

Publications

Hybrid Ionic Liquid Capsules for Rapid CO<sub>2</sub> Capture.

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