Publication type: Article in scientific journal
Type of review: Peer review (publication)
Title: Toward carbon dioxide capture from the atmosphere : lowering the regeneration temperature of polyethylenimine-based adsorbents by ionic liquid
Authors: Weisshar, Florian
Gau, Alina
Hack, Jannis
Maeda, Nobutaka
Meier, Daniel Matthias
et. al: No
DOI: 10.1021/acs.energyfuels.1c00392
Published in: Energy & Fuels
Volume(Issue): 35
Issue: 10
Page(s): 9059
Pages to: 9062
Issue Date: 30-Apr-2021
Publisher / Ed. Institution: American Chemical Society
ISSN: 0887-0624
Language: English
Subjects: CO2; Capture; Material; Atmosphere
Subject (DDC): 660: Chemical engineering
Abstract: Industrial applications of solid adsorbents for direct capture of CO2 from the atmosphere require lowering the regeneration temperature (typically 80–100 °C) to save the energy and operation cost. The addition of ionic liquid (IL) to silica functionalized with polyethylenimine (PEI) was found to lower the temperature of CO2 desorption. Modulation excitation infrared spectroscopy evidenced that the presence of IL weakens the C–N bond in carbamate/carbamic acid species formed by reaction of amine groups of PEI and gaseous CO2 and, thus, facilitates the CO2 desorption at a low temperature. The newly developed PEI–IL composite adsorbent enabled a complete regeneration at 50 °C.
Fulltext version: Published version
License (according to publishing contract): Licence according to publishing contract
Departement: School of Engineering
Organisational Unit: Institute of Materials and Process Engineering (IMPE)
Appears in collections:Publikationen School of Engineering

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