Adsorption and separation of CO2 on KFI zeolites effect of cation type and Si/Al ratio on equilibrium and kinetic properties

Adsorption and separation of CO2 on KFI zeolites : effect of cation type and Si/Al ratio on equilibrium and kinetic properties

Selective separation of CO2 is becoming one of the key technologies in the (petro-) chemical industry. This study focuses on the adsorption and separation of CO2 from CH4 on a new low-silica (LS) type of the eight-membered ring KFI zeolite. A series of alkali (Li, Na, K) and alkaline-earth (Mg, Ca,...

Ausführliche Beschreibung

Bibliographische Detailangaben
Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1992. - 29(2013), 16 vom: 23. Apr., Seite 4998-5012
1. Verfasser: Remy, Tom (VerfasserIn)
Weitere Verfasser: Peter, Sunil A, Van Tendeloo, Leen, Van der Perre, Stijn, Lorgouilloux, Yannick, Kirschhock, Christine E A, Martens, Johan A, Xiong, Yanliang, Baron, Gino V, Denayer, Joeri F M
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2013
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article
Beschreibung
Zusammenfassung:Selective separation of CO2 is becoming one of the key technologies in the (petro-) chemical industry. This study focuses on the adsorption and separation of CO2 from CH4 on a new low-silica (LS) type of the eight-membered ring KFI zeolite. A series of alkali (Li, Na, K) and alkaline-earth (Mg, Ca, Sr) exchanged samples of the new LS KFI were synthesized and characterized. LS Li-KFI showed the largest pore volume, whereas LS Na-KFI and LS K-KFI were inaccessible for Argon at 87 K. Adsorption of CO2 at 303 K demonstrated the dominant quadrupolar interaction on alkali-exchanged LS KFI samples. LS Li-KFI showed the largest capacities upon high pressure isotherm measurements of CO2 (4.8 mmol/g), CH4 (2.6 mmol/g), and N2 (2.2 mmol/g) up to 40 bar at 303 K. The performance of the new LS KFI was compared to a KFI sample (ZK-5) with a higher Si/Al ratio. Isotherm measurements and dynamic breakthrough experiments demonstrated that ZK-5 samples show larger working capacities for CO2/CH4 separations at low pressure. Li-ZK-5 and Na-ZK-5 show the highest capacities and high selectivities (similar to benchmark 13X)
Beschreibung:Date Completed 01.11.2013
Date Revised 30.04.2014
published: Print-Electronic
ErratumIn: Langmuir. 2014 Mar 18;30(10):2968 Martens, Johan A [added]; Xiong, Yanliang [added]
Citation Status PubMed-not-MEDLINE
ISSN:1520-5827
DOI:10.1021/la400352r