Study on spray drying for the production of high value particles

Boris Golman, Wittaya Julklang

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The drying mechanism of high-value particles of hydroxyapatite in an industrial spray dryer was investigated numerically using the developed models and compared with the drying mechanism of silica droplets of the same final size. Similar mechanisms were observed for the drying of slurry droplets of both materials, but the rate of heat and mass transfer between air and droplets was lower, and the heat transfer resistance and heat accumulation in the dry crust was larger in the case of drying of hydroxyapatite droplets. The hydroxyapatite droplets were dried in a longer axial distance in the dryer, and the air temperature decreased and humidity increased more slowly during drying of hydroxyapatite droplets than in the case of silica. The temperature difference between the outer droplet surface and evaporation interface was significantly larger in the hydroxyapatite droplets than that in the silica due to the difference in thermal properties of solid materials. Less water vapour was accumulated in the dry crust of hydroxyapatite than in the crust layer of silica of the same thickness..

Original languageEnglish
Pages (from-to)997-1002
Number of pages6
JournalChemical Engineering Transactions
Volume39
Issue numberSpecial Issue
DOIs
Publication statusPublished - 2014
Externally publishedYes

Fingerprint

Spray drying
Durapatite
Hydroxyapatite
Drying
Silicon Dioxide
Silica
Heat transfer
Driers (materials)
Steam
Air
Water vapor
Atmospheric humidity
Evaporation
Thermodynamic properties
Mass transfer
Temperature

ASJC Scopus subject areas

  • Chemical Engineering(all)

Cite this

Study on spray drying for the production of high value particles. / Golman, Boris; Julklang, Wittaya.

In: Chemical Engineering Transactions, Vol. 39, No. Special Issue, 2014, p. 997-1002.

Research output: Contribution to journalArticle

Golman, Boris ; Julklang, Wittaya. / Study on spray drying for the production of high value particles. In: Chemical Engineering Transactions. 2014 ; Vol. 39, No. Special Issue. pp. 997-1002.
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