Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 108: Issue 2
Solidification and melting of cetane confined in the nanopores of silica gel
Authors:
E. Illeková Institute of Physics, Slovak Academy of Sciences, Dúbravská 9, 845 11, Bratislava, Slovakia

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M. Miklošovičová Institute of Physics, Slovak Academy of Sciences, Dúbravská 9, 845 11, Bratislava, Slovakia

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O. Šauša Institute of Physics, Slovak Academy of Sciences, Dúbravská 9, 845 11, Bratislava, Slovakia

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D. Berek Polymer Institute, Slovak Academy of Sciences, Dúbravská 9, 845 41, Bratislava, Slovakia

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Pages:
497–503
Online Publication Date:
20 Dec 2011
Publication Date:
01 May 2012
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-011-2113-5
Keywords:
Kinetics; DSC; Confined systems; Nanopores; Cetane; Melting; Solidification
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Abstract

Synthetic silica gels with six different effective diameters of nano-pores (3–30 nm) were loaded with n-hexadecane (cetane) after the elimination of adsorbed water. Kinetics of the solidification and melting of cetane was studied by differential scanning calorimetry (DSC) above the room temperature. Two thermodynamically different states of cetane were found in the samples: the free (bulk)-cetane state and the confined-cetane state. As suspected, the third state of cetane can be amorphous. This has been indicated by the small total transformation heat. The complex crystallization effect of cetane has been found to obey the nucleation-and-growth kinetics and also to depend on the dimensions of confining pores of silica gel. The melting of cetane seems to vary only with the average diameter of silica gel pores, which satisfies the Gibbs–Thompson relation. The presented results validate the applicability of the DSC technique for the porometry. The cetane-medium calibration curve for the silica gel nano-thermoporometry has been determined.

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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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