| Autor: |
Tom, Remy, Sunil A, Peter, Leen, Van Tendeloo, Stijn, Van der Perre, Yannick, Lorgouilloux, Christine E A, Kirschhock, Johan A, Martens, Yanliang, Xiong, Gino V, Baron, Joeri F M, Denayer |
| Rok vydání: |
2013 |
| Předmět: |
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| Zdroj: |
Langmuir : the ACS journal of surfaces and colloids. 29(16) |
| ISSN: |
1520-5827 |
| Popis: |
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). |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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