Citation
Chen C.W., . and Chong C.L., . (2001) Isothermal crystallization study of refined palm oil. [Proceedings Paper]
Abstract
The induction time for the crystallization of refined bleached and deodorized palm oil from melt under isothermal condition was studied by viscometry. At temperatures below 295 K the crystallization of palm oil was observed to occur in a two stage process while at temperatures higher than 295 K only a single-stage crystallization process was observed. This two-stage process is confirned by X-ray diffraction where the crystal forms were observed to be a mixture of alpha beta2 for the crystals obtained below 295 K and beta1 for the crystals above 295 K. The results obtained were in good agreement with the discontinuity observed in the induction time versus temperature curve. Nucleation activation free energy and the activation energy for crystal growth were calculated according to the Fisher-Turnbull equation and the Arrhenius equation respectively for the various polymorphic forms. Viscometry was observed to be a sensitive method that could be used for the induction time study of palm oil crystallization especially for low temperatures where the oil could be viscous.
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Abstract
The induction time for the crystallization of refined bleached and deodorized palm oil from melt under isothermal condition was studied by viscometry. At temperatures below 295 K the crystallization of palm oil was observed to occur in a two stage process while at temperatures higher than 295 K only a single-stage crystallization process was observed. This two-stage process is confirned by X-ray diffraction where the crystal forms were observed to be a mixture of alpha beta2 for the crystals obtained below 295 K and beta1 for the crystals above 295 K. The results obtained were in good agreement with the discontinuity observed in the induction time versus temperature curve. Nucleation activation free energy and the activation energy for crystal growth were calculated according to the Fisher-Turnbull equation and the Arrhenius equation respectively for the various polymorphic forms. Viscometry was observed to be a sensitive method that could be used for the induction time study of palm oil crystallization especially for low temperatures where the oil could be viscous.
Additional Metadata
| Item Type: | Proceedings Paper |
|---|---|
| Additional Information: | Available at Perpustakaan Sultan Abdul Samad Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia. TP684 P3N277 2000 Call Number |
| AGROVOC Term: | ELAEIS GUINEENSIS |
| AGROVOC Term: | PALM OILS |
| AGROVOC Term: | CRYSTALLIZATION |
| AGROVOC Term: | PURIFICATION |
| AGROVOC Term: | USES |
| AGROVOC Term: | MALAYSIA |
| Geographical Term: | MALAYSIA |
| Depositing User: | Ms. Norfaezah Khomsan |
| Last Modified: | 24 Apr 2025 05:27 |
| URI: | http://webagris.upm.edu.my/id/eprint/16053 |
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