Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 94: Issue 3
CO2 adsorption and dehydration behavior of LiNaX, KNaX, CaNaX and CeNaX zeolites
Authors:
Y. ErtenIzmir Institute of Technology Department of Chemical Engineering Urla, İzmir Turkey

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A. Güneş-YerkesikliIzmir Institute of Technology Department of Chemical Engineering Urla, İzmir Turkey

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A. ÇetinIzmir Institute of Technology Department of Chemical Engineering Urla, İzmir Turkey

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F. Çakιcιoǧlu-ÖzkanIzmir Institute of Technology Department of Chemical Engineering Urla, İzmir Turkey

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Pages:
715–718
Online Publication Date:
18 Dec 2008
Publication Date:
01 Dec 2008
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-008-9117-9
Keywords:
cation exchange; CO2 adsorption; dehydration behavior; NaX zeolite
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Abstract  

In this study, NaX synthetic zeolite was modified by following the conventional cation exchange method at 70°C. 82, 81, 79 and 48% of sodium were exchanged with Li+, K+, Ca2+ and Ce3+, respectively. Thermal analysis data obtained by TG/DSC was used to evaluate the dehydration behavior of the zeolites. The strongest interaction with water and the highest dehydration enthalpy (ΔH) value were found for Li-exchanged form and compared with the other forms. The temperature required for complete dehydration increased with decreasing cation size (cation size: K+>Ce3+>Ca2+>Na+>Li+). CO2 adsorption at 5 and 25°C was also studied and the virial model equation was used to analyze the experimental data to calculate the Henry’s law constant, Ko and isosteric heat of adsorption at zero loading Qst. Ko values decreased with increasing temperature and the highest Qst was obtained for K rich zeolite. It was observed that both dehydration and CO2 adsorption properties are related to cation introduced into zeolite structure.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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