Starch gelatinisation in Couette-Taylor flow apparatus

Robert Hubacz , Monika Buczyńska

Abstract

In this paper starch gelatinisation in Couette-Taylor flow (CTF) apparatus (equipped with a water heat jacket) has been investigated. CTF (characterised by the presence of Taylor vortices) provides good environment for gelatinisation, e.g. effective mixing, fast heat transfer, positive influence on starch rheological properties. During experiments starch gelatinisation degree and starch swelling has been studied. It was accompanied by temperature measurements performed along the apparatus. Additionally, starch gelatinisation was investigated by computer simulation. A complete starch gelatinisation was obtained for the shortest investigated residence time in the apparatus when the temperature in the heat jacket was above 85 °C. Nevertheless, it seems that it is still possible to reduce a residence time value, as well as, the value of T hj , but it may require some acceleration of rotor rotation. The swelling degree of gelatinised starch increased with growing values of residence time, rotor rotation and process temperature. Heat transferred could be affected by the structure of the Taylor vortex flow. No significant destruction of starch granules was observed during the treatment in Couette-Taylor flow apparatus. A quite satisfactory agreement between computer simulation and experiments results was achieved.
Author Robert Hubacz ZKTP
Robert Hubacz,,
- Department of Process Kinetics and Thermodynamics
, Monika Buczyńska
Monika Buczyńska,,
-
Journal seriesChemical and Process Engineering-Inzynieria Chemiczna I Procesowa, ISSN 0208-6425
Issue year2011
Vol32
No4
Pages267-279
Publication size in sheets0.6
Keywords in Polishsymulacja komputerowa, żelowanie skrobi, przepływ Couette-Taylor
Keywords in Englishstarch gelatinisation, Couette-Taylor flow, computer simulation
DOIDOI:10.2478/v10176-011-0021-7
URL http://dx.doi.org/10.2478/v10176-011-0021-7
Languageen angielski
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Score (nominal)15
Publication indicators WoS Impact Factor: 2011 = 0.378 (2) - 2011=0.219 (5)
Citation count*2 (2015-03-03)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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