首页|Palm-based fat crystallized at different temperatures with and without high-intensity ultrasound in batch and in a scraped surface heat exchanger
Palm-based fat crystallized at different temperatures with and without high-intensity ultrasound in batch and in a scraped surface heat exchanger
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NSTL
Elsevier
The objective of this study was to compare the sonocrystallization process of a palm-based fat in batch to a continuous set-up using a scraped surface heat exchanger (SSHE). The sample was crystallized at 32, 30, 28, and 26 degrees C (T-c). High-intensity ultrasound (HIU, 20 kHz, 12.7 mm horn, 50% amplitude, 57W) was applied using lOs pulses. After crystallization, samples were stored (48 h/25 degrees C) and analyzed for crystal microstructure, melting behavior, oil binding capacity (OBC), hardness, and viscoelastic properties. HIU improved all physical properties of the material when crystallized in batch at all T-c; however, SSHE at 26 degrees C was the only condition improved by HIU. G' and hardness were the highest in sonicated SSHE samples crystallized at 26 degrees C (141 kPa, 4.5N) and these values were higher than the ones obtained in batch. OBC was also improved in sonicated SSHE samples (77%) but in lower magnitude compared to the OBC obtained in batch (82%). Crystal size was not affected by HIU in the SSHE, but a reduction in crystal size was observed due to HIU in batch for all Te. Similar behavior was observed for T-p, however, T-on and Delta H were not affected by HIU.
NSTL
Elsevier
