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All Journal Jurnal Sains dan Teknologi Reaksi
Andryan Suhagamal
Politeknik Negeri Lhokseumawe
Chemical Engineering, Chemistry & Bioengineering Chemistry Education Engineering Materials Science & Nanotechnology

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CHARACTERISTICS OF CALCIUM OXIDE (CaO) FROM RICE HUSKS (ORYZA SATIVA) AS A CATALYST FOR BIODIESEL SYNTHESIS USING PALM OIL Andryan Suhagamal; N Nahar; E Elwina
Jurnal Sains dan Teknologi Reaksi Vol 23, No 01 (2025): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v23i01.10974

Abstract

This study aims to analyze the characteristics of calcium oxide (CaO) produced from rice husks (Oryza sativa) through combustion, as well as to test its effectiveness as a heterogeneous catalyst in biodiesel synthesis using palm oil. The variables studied included rice husk particle size (mesh 60/80 to 140/160) and catalyst weight (5–25 grams). The transesterification process was carried out at 60°C for 3 hours with a methanol to oil ratio of 60:150 mL. Catalyst characterization was performed using FTIR, while biodiesel was analyzed based on biodiesel yield, viscosity, density, and flash point in accordance with SNI 7182:2015. The results showed that particle size and catalyst weight significantly affected catalyst performance and biodiesel quality. A mesh size of 100/120 with a catalyst weight of 15 grams produced the highest yield of 86.9%, with a viscosity of 3.92 mPa·s, a density of 0.860 g/cm³, and a flash point of 111°C. All biodiesel physical property test results met SNI standards. Therefore, CaO from rice husks proved to be effective and environmentally friendly as an alternative catalyst in biodiesel production.Keywords: Biodiesel, Calcium Oxide, Rice Husk, Transesterification, Heterogeneous Catalyst
Co-Authors E Elwina N Nahar