Determination of the effect of the effect of antioxidant derived from the methanolic extraction of mangosteen leaves (Garcinia mangostana) on the oxidation stability of Jatropha curcas L. biodiesel

Date

3-2010

Degree

Bachelor of Science in Chemistry

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Jovita L. Movillon

Committee Member

Ramer P. Bautista, Rex B. Demafelis

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Abstract

The potential of antioxidants derived from mangosteen leaves extracts is evaluated in this study. The amount of polyphenol compounds, which is said to exhibit the antioxidant property in leaves, was determined at various soaking time using the Folin-Ciocalteau Assay. The total polyphenol content computed after the Folin-Ciocalteau Assay are 463.97, 520.12, 497.09 and 527.99, reported in milligrams gallic acid equivalent per 100 grams of dried leaves, for six, twelve, eighteen and twenty four hours of soaking time respectively. The effect of varying loading rates on the oil stability index of Jatropha methyl ester and Jatropha ethyl ester was also determined with the optimum loading rate of 3472 ppm which corresponds to 21.31 hours and 12.57 hours of induction period for the Jatropha methyl ester biodiesel and Jatropha ethyl ester biodiesel respectively. The induction period for Jatropha methyl ester biodiesel is higher than that of Jatropha ethyl ester biodiesel because the later is a longer chain alkyl ester. For Baynox, the longest induction period achieved was 6.17 hours using 2083 ppm of loading rate. By the analysis of the results from the rancimat method and the cost of production of antioxidant derived from mangosteen leaves in contrast to Baynox, it can be inferred that the antioxidant derived from mangosteen leaves is more efficient and economical compared to Baynox.

Language

English

Location

UPLB College of Engineering and Agro-Industrial Technology

Document Type

Thesis

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