Garuda - Garba Rujukan Digital

Muhammad Zakir

Department of Chemistry, Hasanuddin University

Author-ID : 2734373

Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering

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Articles

Pengaruh Penambahan Ion Mg2+ Terhadap Kandungan Lipid Fitoplankton Chlorella vulgaris Sebagai Bahan Baku Pembuatan Biodiesel dengan Metode Ultrasonik Alfani M Datu; Indah Raya; Muhammad Zakir
Marina Chimica Acta Vol. 14 No. 2 (2013): Volume 14 No. 2 (2013)
Publisher : Hasanuddin University

An investigation on the effect of Mg2+ on its lipid content from phytoplankton Chlorella vulgaris as a raw material for producing biodiesel by ultrasonic method has been carried out. The results showed that Mg2+ is good as a nutrient for phytoplankton. The optimum concentration was 0.4 ppm. Total of dry biomass was 32.7902 grams. Lipid was extracted by ultrasonic method using ethanol 95% as solvent. Biodiesels were syntesized in two steps namely esterification by methanol solvent and H2SO4 as catalyst, folowed by transesterification by using methanol solvent with KOH as a catalyst. Total of biodiesel made was 11.5727 grams and the yield was 35.29%. The result of biodiesel characterised in term of physical and chemical characteristics including: density, viscosity, free fatty acid, saponification value, and iodine value, respectively. Result of the analysis showed that biodiesel characteristics have fulfilled standard the American Society for Testing and Materials (ASTM D6751), except value of density and Free Fatty Acid.

Produksi Biodiesel dari Lipid Fitoplankton Nannochloropsis sp. Melalui Metode Ultrasonik Raymond Kwangdinata; Indah Raya; Muhammad Zakir
Marina Chimica Acta Vol. 14 No. 2 (2013): Volume 14 No. 2 (2013)
Publisher : Hasanuddin University

A research on production of biodiesel from lipid of phytoplankton Nannochloropsis sp. through ultrasonic extraction method has been done. In this research, we carried out a series of phytoplankton culture to determine the optimum time of growth and biodiesel synthesis process from phytoplankton lipids. Process of biodiesel synthesis consists of two steps, i.e isolation of phytoplankton lipids and biodiesel synthesis from that lipids. Oil isolation process was carried out by ultrasonic extraction method using ethanol 96 % while biodiesel synthesis was carried out by transesterification reaction using methanol and KOH catalyst under sonication. Percentage rendement of weight per biomass Nannochloropsis sp. is 48,33 %. Characterization of biodiesel was carried out in terms of physical properties: density, viscosity, and chemical properties: FFA content, saponification value, and iodine value. The result showed that analysis characterization biodiesel phytoplankton Nannochloropsis sp. that biodiesel from that species phytoplankton generally fullfilled the American Society for Testing and Materials (ASTM D6751) standard, except density value was 0,8151 g.cm-3, viscosity value was 1,15 cSt, and FFA content was 0,5381 %, to be used as fuel.

Optimalisasi Proses Sintesis Dan Karakterisasi Biodiesel Dari Minyak Alga Merah (Eucheuma cottonii) Dengan Katalis Kalium Hidroksida (KOH) Muhammad Zakir; Indah Raya; Asbia Asbia
Jurnal Akta Kimia Indonesia (Indonesia Chimica Acta) Volume 3 No 1 - June 2010
Publisher : Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/ica.v3i1.5973

Research on the optimalization of synthesis process of biodiesel as an alternative fuel from red algae oil (Eucheuma cottonii) with potasium hidroksida (KOH) had been done. Red algae (E. cottonii) oil was used as raw material in the Biodiesel synthesis. Red algae oil was gained through extraction process with soxhletation method using n-heksane as solvent. Biodiesel (methyl ester) had been synthesized from red algae oil by transesterification process used methanol as solvent and KOH as catalyst. The process had been done at 40, 50, 60, and 70 oC with reaction time 2, 3, 4, and 5 hours. The total fatty acids and free fatty acids of the product were used in the calculation of conversion value. The optimum temperature and reaction time giving the greatest number of biodiesel conversion is 60 0C for 4-5 hours with conversion 24,1077%. The biodiesel of highest conversion was characterized physically and chemically. The Result showed that viscosity, density, water value, and iodine number were 4,432 cSt, 0,8383 g/mL, 0,013, and 10,66 mg/mek, respectively. Biodiesel from red algae oil that was not effective to be used as alternative fuel because of its product is very low.Keywords: Biodiesel fuel, Eucheuma cottonii, transesterification, KOH

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