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Mixed-Matrix Organo-Silica-Hydrotalcite Membrane for CO₂ Separation Part 1: Synthesis and Analytical Description

Bünger, Lucas 1; Garbev, Krassimir ORCID iD icon 1; Ullrich, Angela 1; Stemmermann, Peter ORCID iD icon 1; Stapf, Dieter 1
1 Institut für Technische Chemie (ITC), Karlsruher Institut für Technologie (KIT)

Abstract (englisch):

Hydrotalcite exhibits the capability to adsorb CO2 at elevated temperatures. High surface
area and favorable coating properties are essential to harness its potential for practical applications.
Stable alcohol-based dispersions are needed for thin film applications of mixed membranes containing
hydrotalcite. Currently, producing such dispersions without the need for delamination and
dispersing agents is a challenging task. This work introduces, for the first time, a manufacturing
approach to overcoming the drawbacks mentioned above. It includes a synthesis of hydrotalcite
nanoparticles, followed by agent-free delamination of their layers and final dispersion into alcohol
without dispersing agents. Further, the hydrotalcite-derived sorption agent is dispersed in a matrix
based on organo-silica gels derived from 1,2-bis(triethoxysilyl)ethane (BTESE). The analytical results
indicate that the interconnection between hydrotalcite and BTESE-derived gel occurs via forming a
strong hydrogen bonding system between the interlayer species (OH groups, CO3
2−) of hydrotalcite
and oxygen and silanol active gel centers. These findings lay the foundation for applications involving
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Zugehörige Institution(en) am KIT Institut für Technische Chemie (ITC)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 06.08.2024
Sprache Englisch
Identifikator ISSN: 2077-0375
KITopen-ID: 1000173456
HGF-Programm 38.05.02 (POF IV, LK 01) Metals and Minerals Cycle
Erschienen in Membranes
Verlag MDPI
Band 14
Heft 8
Seiten Art.-Nr.: 170
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Schlagwörter hydrotalcite; BTESE gel; delamination; CO2 separation; mixed-matrix membrane
Nachgewiesen in Dimensions
Web of Science
OpenAlex
Scopus
Globale Ziele für nachhaltige Entwicklung Ziel 13 – Maßnahmen zum Klimaschutz

Verlagsausgabe §
DOI: 10.5445/IR/1000173456
Veröffentlicht am 15.08.2024
Originalveröffentlichung
DOI: 10.3390/membranes14080170
Scopus
Zitationen: 1
Web of Science
Zitationen: 1
Dimensions
Zitationen: 1
Seitenaufrufe: 109
seit 15.08.2024
Downloads: 10
seit 23.08.2024
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