Simultaneous Extraction and In-Situ Transesterification of Chlorella vulgaris Using Microwave-Assisted Method for Biodiesel Production
Penulis/Author
RANDY ADHIPUTRA (1); Maisari Utami (2); Dr. Eko Agus Suyono, S.Si., M.App.Sc. (3); Prof. Dr.Eng. Ir. Arief Budiman, M.S., IPU. (4); Poedji Loekitowati Hariani (5); Dra. Ani Setyopratiwi, M.Si. (6); Prof. Dr. rer. nat. Karna Wijaya, M.Eng. (7)
Tanggal/Date
18 2021
Kata Kunci/Keyword
Abstrak/Abstract
This research aims to study the simultaneous extraction and transesterification of Chlorella vulgaris (C. vulgaris) using microwave irradiation with methanol as solvent and potassium hydroxide (KOH) as catalyst. The microwave-assisted insitu transesterification of C. vulgaris is assessed at various ratios of biomass-to-methanol, reaction times, and catalyst concentrations during the centrifugation and evaporation process. Gas chromatography-mass spectrometry (GC-MS) analysis is performed to confirm fatty acid methyl ester (FAME) composition. Biodiesel preparation is carried out by simultaneous extraction and transesterification of microalgae from C. vulgaris. The product is then characterized using Fourier transform
infrared spectroscopy (FTIR) and proton nuclear magnetic resonance ( 1 H-NMR); microalgae are observed using scanning electron microscopy (SEM). The highest amount of FAME is obtained at a biomass-to-methanol ratio of 1:12, reaction time of 40 min, and catalyst concentration of 2 wt%. Biodiesel shows conversion to about 77.64% of methyl ester (methyl myristate, methyl palmitoleate, methyl linoleate, methyl oleate, methyl arachidonate, and methyl 5,8,11,14,17-eicosapentanoate).
