Optimisation of lipase-catalysed interesterification reaction for modulating rheological and heat transfer properties of frying oil.

Sukumar, Debnath and Ravi, R. and Lokesh, B. R. (2011) Optimisation of lipase-catalysed interesterification reaction for modulating rheological and heat transfer properties of frying oil. Food Chemistry, 129 (4). pp. 1444-1452.

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Abstract

The present work reports the optimisation of enzyme interesterification reaction of rice bran oil (RBO) and refined, bleached, deodorized, palm olein (RBDPO) blend using immobilized 1,3-specific lipase, to improve the kinematic viscosity and heat transfer coefficient of oil, important for characterising heat transfer during the frying process. Four variables, namely RBO (20–80%) in RBO–RBDPO blend, reaction temperature (25–65 °C), enzyme concentration (1–13%, w/w) and reaction time (1–13 h) were selected and optimised using response surface methodology (RSM) coupled with central composite rotatable design (CCRD). The optimisation results predicted that optimum reaction conditions for preparing enzyme interesterified oil, having minimum kinematic viscosity (2.63 × 10−6 m2 s−1) and maximum heat transfer coefficient (262.0 Wm−2 °C−1) were at 62% RBO, temperature 65 °C, enzyme concentration 10% (w/w) and time 6.4 h. The predicted values were validated experimentally and corroborated with DSC melting profile and triacylglycerol molecular species data. This investigation could help snack food industries to develop suitable oils for frying operations.

Item Type:	Article
Uncontrolled Keywords:	Frying oil; Transesterification; Kinematic viscosity; Heat transfer coefficient; Response surface methodology
Subjects:	600 Technology > 08 Food technology > 14 Physical properties 600 Technology > 08 Food technology > 19 Lipids-oils/fats
Divisions:	Lipid Science and Traditional Foods
Depositing User:	Food Sci. & Technol. Information Services
Date Deposited:	12 Oct 2011 04:51
Last Modified:	13 Oct 2011 14:42
URI:	http://ir.cftri.res.in/id/eprint/10465

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