ESTERIFICATION OF FATTY ACID FROM PALM OIL WASTE (SLUDGE OIL) BY USING ALUM CATALYST

https://doi.org/10.22146/ijc.21522

Thamrin Usman(1*), Lucy Ariany(2), Winda Rahmalia(3), Romi Advant(4)

(1) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Tanjungpura University, Jl. Ahmad Yani Pontianak, Kalimantan Barat 79124
(2) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Tanjungpura University, Jl. Ahmad Yani Pontianak, Kalimantan Barat 79124
(3) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Tanjungpura University, Jl. Ahmad Yani Pontianak, Kalimantan Barat 79124
(4) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Tanjungpura University, Jl. Ahmad Yani Pontianak, Kalimantan Barat 79124
(*) Corresponding Author

Abstract


Esterification of fatty acids from palm oil waste (sludge oil) as biodiesel liquid base has been done by using alum [Al2(SO4)3.14H2O] catalyst. Some reaction variables like reaction time, catalyst quantity, and molar ratio of sample-reactant was applied for optimal reaction. Yield of 94.66% was obtained at reaction condition 65 °C, 5 h, sample-reactant ratio 1:20, and catalyst quantity 3% (w/w). GC-MS analysis request showed that composition of methyl esters biodiesel are methyl caproic (0.67%), methyl lauric (0.21%), methyl miristic (1.96%), methyl palmitic (49.52%), methyl oleic (41.51%), and methyl stearic (6.13%). Physical properties of synthesized product (viscosity, refraction index and density) are similar with those of commercial product.

 

Keywords: alum, biodiesel, esterification, sludge oil


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DOI: https://doi.org/10.22146/ijc.21522

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Indonesian Journal of Chemisty (ISSN 1411-9420 / 2460-1578) - Chemistry Department, Universitas Gadjah Mada, Indonesia.

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