Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/9071
Title: Investigation of kinetics of supercritical drying of alginate alcogel particles
Authors: Şahin, İbrahim
Uzunlar, Erdal
Erkey, Can
Keywords: Aerogel
Supercritical drying
Kinetics
Mass transfer
Modeling
Calcium alginate
Mathematical model
Issue Date: 2019
Publisher: Elsevier Ltd.
Abstract: Spherical calcium alginate gel particles were synthesized by dripping method. The effects of temperature, pressure, particle size and CO2 flow rate on kinetics of supercritical drying of alginate gel particles in a packed bed were investigated. Increase in CO2 flow rate, increase in temperature and decrease in particle size increased the drying rate and decreased the drying time. A mathematical model based on (i) the diffusion of the solvent inside the pores of gel particles, (ii) external mass transfer of the solvent from the surface of the gel particles into the flowing fluid stream, and (iii) convection and axial dispersion of the solvent in the flowing fluid stream was developed. A correlation for predicting external mass transfer coefficients for supercritical drying of alcogel particles was developed by fitting the model to experimental data. A good agreement between the experimental data and model results was achieved using the developed correlation.
URI: https://doi.org/10.1016/j.supflu.2018.12.019
https://hdl.handle.net/11147/9071
ISSN: 0896-8446
1872-8162
Appears in Collections:Chemical Engineering / Kimya Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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