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Confinement phenomenon on CO2 absorption working capacity in ionic liquids immobilized into porous solid supports
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science.ORCID iD: 0000-0002-0200-9960
China Petroleum Chemicals Kunshan Company.
State Key Laboratory of Materials-Oriented and Chemical Engineering, Nanjing Tech University.
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2017 (English)In: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827Article in journal (Refereed) Epub ahead of print
Abstract [en]

In this work, the CO2 absorption working capacity and solubility in the ionic liquids immobilized into porous solid materials (substrates) was studied both experimentally and theoretically. The CO2 absorption working capacity in the immobilized ionic liquids was measured experimentally. It was found that the CO2 absorption working capacity and solubility increased up to 10 times compared to that in the bulk ionic liquids when the film thickness is nearly 2.5 nm in the [HMIm][NTf2] immobilized into the P25. Meanwhile, a new model was proposed to describe the Gibbs free energy of CO2 in the immobilized ionic liquids, and both macro- and micro-analyses of the CO2 solubility in the confined ionic liquids were conducted. The theoretical investigations reveal that the substrate has a crucial effect on the gas solubility in the ionic liquid immobilized into the substrates, and the model performance was approved with the consideration of substrate effect.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2017.
National Category
Energy Engineering
Research subject
Energy Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-65423DOI: 10.1021/acs.langmuir.7b02204PubMedID: 28844135OAI: oai:DiVA.org:ltu-65423DiVA: diva2:1137196
Available from: 2017-08-30 Created: 2017-08-30 Last updated: 2017-09-21

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