Optimization of oil extraction with agitation from Jatropha curcas L. seed kernels using petroleum ether as solvent

Date

4-2010

Degree

Bachelor of Science in Chemical Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Monet Concepcion C. Maguyon

Committee Member

Rex B. Demafelis, Jovita L. Movillon

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Abstract

The maximum extractable oil content of Jatropha seeds using petroleum ether as solvent was approximately equal to 50.64% (wt/wt, db). It was found that decreasing the kernel-to-solvent ratio increases the percent oil recovery while agitation time has no significant effect on percent oil recovery. The optimum agitation time and kernel-to-solvent ratio for OPTIMUM A generated using the Design Expert® 8.0.1 software were found to be 2.13 hours and 0.05, respectively with an oil recovery of 86.37% with a corresponding extraction cost per gram of oil extracted of Php28.55/g. For OPTIMUM B, the optimum agitation time and kernel-to-solvent ratio were found to be 0.50 hours and 0.06, respectively with an oil recovery of 82.86% with a corresponding extraction cost per gram of oil extracted of Php 22.77/g. The Jatropha oil extracted at optimum combination of agitation time and kernel-to-solvent ratio (0.50 hours and 0.06) was analyzed for physical- and chemical properties and found to have an acid value of 29.52 mg KOH/g, iodine value of 97.58 g I2 / 100 g oil, saponification number of 192.67 mg KOH/g, and specific gravity of 0.8989. The consistency of these values with existing literature implied that the oil should undergo refining to make it a good feedstock for biodiesel production.

Language

English

Location

UPLB College of Engineering and Agro-Industrial Technology

Document Type

Thesis

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