Crystallization under supercritical conditions in aerogels

Publikationstyp
Journal Article
Publikationsdatum
2007-08-17
Sprache
English
Author
Gorle, Babu Suresh Kumar 
Smirnova, Irina orcid-logo
Drǎgan, Michaela 
Drǎgan, Simon 
Arlt, Wolfgang 
TORE-URI
http://hdl.handle.net/11420/12676
Enthalten in
The journal of supercritical fluids 
Volume
44
Issue
1
Start Page
78
End Page
84
Citation
Journal of Supercritical Fluids 44 (1): 78-84 (2008-01-01)
Publisher DOI
10.1016/j.supflu.2007.08.004
Scopus ID
2-s2.0-37349124635
Publisher
Elsevier Science
In this work crystallization of organic compounds in silica aerogels is studied. The effect of density and surface properties of silica aerogels on crystallization of a model substance, naphthalene, from supercritical CO2 is investigated. It is shown that the surface properties of aerogels play a significant role in affecting the crystallization process. Loadings up to 55 wt% could be achieved for hydrophilic aerogels whereas hydrophobic aerogels could be loaded with ca. 40 wt% of naphthalene. Naphthalene crystals in the range of 500 nm-2 mm were obtained inside the aerogel matrix depending on the crystallization conditions. The potential of this process as "adsorptive crystallization" is discussed.
Schlagworte
Adsorptive crystallization
Aerogels
Supercritical carbon dioxide
DDC Class
540: Chemie