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Chitosan-based aerogels as reversible CO2 adsorbents

Niemeyer, Philipp David and Ganesan, Kathirvel and Milow, Barbara and Ratke, Lorenz (2017) Chitosan-based aerogels as reversible CO2 adsorbents. 5th International Conference on Multifunctional, Hybrid and Nanomaterials, 06. -10. März 2016, Lissabon, Portugal.

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Polysaccharide aerogels exhibit outstanding properties for many applications including gas filters. Due to relatively high surface areas, mesoporosity and the presence of amine groups, chitosan-based aerogels can be used as potential CO2 adsorbents in environmental control systems (ECS). For this application, the chitosan backbone was chemically modified by grafting different molecules onto the amine groups which was carried out either in the gel state or in the gas phase. Within this presentation we will report on chitosan-based gel bead production by the JetCutter, a mechanical cutting machine with high throughput. The sizes of beads were varied between 0.5 and 2 mm in order to produce filter material. Sodium hydroxide solution was used as regeneration bath. After several washings with water and ethanol, supercritical CO2 drying was applied for aerogel production. The CO2 adsorption capacity was characterized at low CO2 partial pressures by dynamic breakthrough measurements using CO2/N2 mixtures. Desorption of CO2 from chitosan aerogel beads was investigated under nitrogen gas flow at moderate temperatures. The moisture adsorption capacity was measured using humidified nitrogen gas flow. Nitrogen sorption measurements were performed for the evaluation of specific surface area and pore size distribution. Scanning electron microscopy images showed an interconnected nanofibrillar structure of the aerogel beads. FTIR measurements confirmed the successful chemical modification of the chitosan backbone. Chitosan-based aerogel materials can be potential candidates for CO2 filters in ECS as the chemical modification can enhance the CO2 adsorption and the regeneration can be achieved at reasonable temperatures. Acknowledgements: This project has received funding from the European Union´s Horizon 2020 research and innovation program under grant agreement No 685648

Item URL in elib:https://elib.dlr.de/111550/
Document Type:Conference or Workshop Item (Poster)
Title:Chitosan-based aerogels as reversible CO2 adsorbents
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Niemeyer, Philipp DavidPhilipp.Niemeyer (at) dlr.dehttps://orcid.org/0000-0002-4386-2589
Ganesan, Kathirvelk.ganesan (at) dlr.deUNSPECIFIED
Milow, Barbarabarbara.milow (at) dlr.deUNSPECIFIED
Ratke, Lorenzlorenz.ratke (at) dlr.dehttps://orcid.org/0000-0003-2487-4717
Date:March 2017
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Chitosan Aerogel CO2 Adsorption Reversible
Event Title:5th International Conference on Multifunctional, Hybrid and Nanomaterials
Event Location:Lissabon, Portugal
Event Type:international Conference
Event Dates:06. -10. März 2016
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Terrestrial Vehicles (old)
DLR - Research area:Transport
DLR - Program:V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):V - NGC Fahrzeugstruktur (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Aerogele
Deposited By: Niemeyer, Philipp David
Deposited On:18 Aug 2017 13:00
Last Modified:27 Nov 2017 13:06

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