Seagas: Evaluating the Biodiesel Potential of Local Seaweed Species Kappaphycus Alvarezii and Eucheuma sp

Ylaiza Fayne C. Delos Reyes, Cleford Jay D. Bacan, Kerby Boy Sultan, Trixie Mia P. Rebuta, Aaliyah Martine J. Estember, Allyza Pearl Baroy, Queen Margarette Ayaron, Eshymyl Frya Retes and Gee William G. Apura
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Ylaiza Fayne C. Delos Reyes: Cor Jesu College Inc., Philippines
Cleford Jay D. Bacan: Cor Jesu College Inc., Philippines
Kerby Boy Sultan: Cor Jesu College Inc., Philippines
Trixie Mia P. Rebuta: Cor Jesu College Inc., Philippines
Aaliyah Martine J. Estember: Cor Jesu College Inc., Philippines
Allyza Pearl Baroy: Cor Jesu College Inc., Philippines
Queen Margarette Ayaron: Cor Jesu College Inc., Philippines
Eshymyl Frya Retes: Cor Jesu College Inc., Philippines
Gee William G. Apura: Cor Jesu College Inc., Philippines

International Journal of Research and Scientific Innovation, 2025, vol. 12, issue 4, 320-341

Abstract: The study evaluated the biodiesel quality of two local seaweed species, Kappaphycus alvarezii and Eucheuma sp., in terms of density, viscosity, flash point, and combustion efficiency. Biodiesel samples were produced and tested under an alternative laboratory setup, with measurements taken across three replicates. K. alvarezii biodiesel exhibited a density of 0.88 g/cm³, viscosity of 4.80 cSt, flash point of 131°C, and combustion efficiency of 98.40%, while Eucheuma sp. biodiesel showed a density of 0.88 g/cm³, viscosity of 5.02 cSt, flash point of 0.88°C, and combustion efficiency of 98.00%. Comparisons with commercial diesel, which had a density of 0.85 g/cm³, viscosity of 3.50 cSt, flash point of 60°C, and combustion efficiency of 99.00%, revealed statistically significant differences in all parameters (p

Date: 2025
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