Enzyme-assisted extraction and Carica papaya latex-catalyzed transesterification of Jatropha curcas L. oil biodiesel production

Date

5-2007

Degree

Bachelor of Science in Chemistry

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Veronica P. Migo

Abstract

The never ending oil price hike and growing environmental concerns with regards the use of these fuels have triggered the search for alternative sources of energy, biodiesel is one. Biodiesel is produced from the transesterification of oil. The seed from the Jutropha curcas plant contains extractable oil and it can be used to produce biodiesel. The oil was extracted enzymatically using the enzymes xylanase, cellulose. amylase and lipase. Extraction was done individually with these enzymes as well as combinations of the four enzymes. Individually the highest oil yield of 44.1% was obtained for the enzyme xylanase (X), then 42.1% for cellulose (C), 32.4% for amylase (A) and 28.9% for lipase (L). These enzymes were used consecutively in the order XACL and this resulted in a higher oil yield of 74.4%. The solvent extraction process resulted in a 76.6% oil yield. The multiple use of enzymes for oil extraction can be comparable to the hexane process. to The oil extracted was then transesterified with Carica papaya latex. This resulted in a percent conversion of 80.0% while the base-catalyzed process resulted in an 84.5% conversion. The use of latex can be comparable to the use of K01-1 in terms of percent conversion.

Language

Filipino

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993. 5 2007 C42 A68

Document Type

Thesis

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