Optimization of solvent extraction with agitation of oil from Jatropha curcas L. seed kernels using ethanol for biodiesel production

Date

2011

Degree

Bachelor of Science in Chemical Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Butch G. Bataller

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Abstract

Using ethanol as solvent, crude oil was extracted from Jatropha curcas L. seed kernels with agitation. Factors like agitation time and kernel-to-solvent ratio were studied and optimized using the Central Composite Design (CCD) of the Response Surface Methodology (RSM). The optimum conditions were also tested in a confirmatory experiment. The experiment used two approaches. The first was using one response (oil recovery) and the other using two responses (oil recovery and extraction cost per gram of recovered oil). For the first approach, the optimum conditions were 16.25 hours and 0.03 g/mL with an oil recovery of 98.42% and extraction cost of Php 34.62 per gram of oil (OPTIMUM A). For the second approach, the optimum conditions were 2.47 hours and 0.04 g/mL with an oil recovery of 97.90% and extraction cost of Php 6.59 per gram of oil (OPTIMUM B). OPTIMUM B was selected, by statistical analysis, since it had a lower extraction cost than OPTIMUM A. Also, agitation was compared with soaking using the conditions of OPTIMUM B (58.43% oil recovery). By statistical analysis, it was concluded that agitation is better than soaking since agitation gave high oil recovery in a small span of time. Using OPTIMUM B, the oil extracted was characterized. The results were compared with the literature values and showed a slight deviation only for acid value. Iodine value, saponification value and specific gravity coincide with the literature values. Through refinement, the oil extracted can be a good feedstock for large-scale biodiesel production.

Language

English

LC Subject

Extraction, Jatropha, Biodiesel

Location

UPLB College of Engineering and Agro-Industrial Technology (CEAT)

Call Number

LG 993.5 2011 E62 J37

Document Type

Thesis

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