Small-scale Deodorization of Coconut Oil under Atmospheric Pressure using a Steam Generator
Author : Manoto, Russel D.
Major Adviser : Lozada, Ernesto P.
Committee Members : Acda, Reynaldo I.; Arquiza, Apollo C.
Year : 1993
Month : March
Type : Thesis
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A small-scale batch system of 10 liters oil capacity was designed and fabricated for the deodorization of coconut oil under atmospheric pressure using a steam generator and was used to evaluate its feasibility. Two operating conditions were used. In the first operating condition, the temperature of coconut oil was 100 °C and steam pressure was 24.7 psia while in the second, the coconut oil temperature was 102 °C and steam pressure was 34.7 psia.
Deodorization of coconut oil under the first and second operating conditions required four hours to increase the average olfactory rating of coconut oil to 9.11 and 9.31 respectively, which are both characterized with race of odor but not recognizable. The steam-oil ratio was 3 kg : 1 liter and 2.6 kg : 1 liter for the first and second operating conditions respectively.
Mathematical expressions for the preliminary kinetics of deodorization of coconut oil under the first and second operating condition were derived. For operating condition 1, R = [(0.374*F*t)/Vo] + 8.0 and for operating condition 2, R = [(0.488*Ft)/Vo] + 8.0., where: R = olfactory rating; F = steam flow rate (kg/hr); t = deodorization time (hr); Vo = volume of coconut oil to be deodorized (liter). These mathematical expressions need further study and verification.
Free fatty acid content of crude oil was reduced from 0.369 to 0.348 % and from 0.297 to 0.282 % after four hours of deodorization under the first and second operating condition respectively. The clarity of coconut oil increased from 98.0 to 98.5% transmittance after deodorization under the second Moisture increased from 0.24% to 0.34% and from 0.20% to 0.28% after deodorization under the first and second operating conditions respectively.
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