Influence of polyglycerol ester additive on palm oil fractionation in relation to the crystal size distribution

Yeoh C. B., . and Elina Hishamuddin, . and Lim W. H., . and Saw M. H., . and Siti Hazirah Mohamad Fauzi, . Influence of polyglycerol ester additive on palm oil fractionation in relation to the crystal size distribution. pp. 303-312. ISSN 1511-2780

The effect of polyglycerol ester (PGEmix-8) additive on palm oil fractionation was studied at isothermal temperature of 24C. Sampling was conducted at 20 min intervals to determine the solid fat content (SFC) of the slurries and the yield and compositions of the olein and stearin fractions. The peak of crystal size distribution was reduced from 100 m to an average of 70 m when 0.1 (w/w) to 0.5 (w/w) of PGEmix-8 were added in palm oil. The peak value was further reduced to 35 m when 0.7 (w/w) additive was used. In spite of this the SFC of the slurries remained unchanged during the isothermal crystallisation. These results show that PGEmix-8 had influenced the crystal size distribution without affecting the volume of the crystals formed. The fractionation results showed that olein yield increased about 3 to 6 but the triacylglycerol composition of the oleins were comparable with the control. An increase of saturation and a reduction of monounsaturation content in the stearin fractions were observed with increasing PGEmix-8 addition. These results implied that the increase in olein yield was due to less olein entrainment as a result of the more homogeneous and smaller crystals of the palm oil slurries.

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Abstract

The effect of polyglycerol ester (PGEmix-8) additive on palm oil fractionation was studied at isothermal temperature of 24C. Sampling was conducted at 20 min intervals to determine the solid fat content (SFC) of the slurries and the yield and compositions of the olein and stearin fractions. The peak of crystal size distribution was reduced from 100 m to an average of 70 m when 0.1 (w/w) to 0.5 (w/w) of PGEmix-8 were added in palm oil. The peak value was further reduced to 35 m when 0.7 (w/w) additive was used. In spite of this the SFC of the slurries remained unchanged during the isothermal crystallisation. These results show that PGEmix-8 had influenced the crystal size distribution without affecting the volume of the crystals formed. The fractionation results showed that olein yield increased about 3 to 6 but the triacylglycerol composition of the oleins were comparable with the control. An increase of saturation and a reduction of monounsaturation content in the stearin fractions were observed with increasing PGEmix-8 addition. These results implied that the increase in olein yield was due to less olein entrainment as a result of the more homogeneous and smaller crystals of the palm oil slurries.

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Item Type:	Article
AGROVOC Term:	Palm oils
AGROVOC Term:	Fractionation
AGROVOC Term:	Esters
AGROVOC Term:	Additives
AGROVOC Term:	Crystallization
AGROVOC Term:	Olein
AGROVOC Term:	Analysis of variance
AGROVOC Term:	Fatty acids
AGROVOC Term:	Triacylglycerols
AGROVOC Term:	Stearin
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:54
URI:	http://webagris.upm.edu.my/id/eprint/9167

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