Source: Kimberlee Anne Melu


The Biofuel Act of 2006 mandates the blending of biodiesel in all diesel fuel sold across the country. Having an increase demand on using the biofuels, the country needs more alternative sources. The seed of Terminalia catappa, one of the most abundant trees in the Philippines contains 51.2 percent oil (called catappa oil).

Talisay or catappa oil was extracted using the solvent method, a mixture of hexane and isopropanol wih 3:2 ratios. The dried seeds were ground to fine consistence 60mL of hexane along with 40mL isopropanol was mixed in a beaker and allowed to soak for 5-10 minutes. Catappa oil was collected through decantation.


The collected catappa oil was made into biodiesel through transesterification. Biodiesel is made to make sodium methoxide. The sodium methoxide is then mixed with talisay oil and allowed to settle. Glycerin forms at the bottom, while methyl esters (biodiesel) float to the top.

The talisai biodiesel was added to commercial diesel at 5:95 ratios. The extended diesels were subjected to flammability test, emission test, and mileage test. It was found out that there is no significant difference between 5% extended talisay biodiesel to that of 100% pure commercial diesel.

It was therefore conclude that talisay seed oil was suitable in the production of biodiesel.