Sintesis Biodiesel dari Minyak Mikroalga Nannochloropsis Sp. Melalui Transesterifikasi Menggunakan Katalis Basa

Riza Habibi  -  Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University, Indonesia
*Enny Fachriyah scopus  -  Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University, Indonesia
Dewi Kusrini scopus  -  Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University, Indonesia
Published: 1 Apr 2010.
Open Access Copyright 2010 Jurnal Kimia Sains dan Aplikasi
License URL: http://creativecommons.org/licenses/by-sa/4.0/

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Abstract
Telah dilakukan penelitian tentang sintesis biodiesel dari minyak mikroalga Nannochloropsis sp. melalui transesterifikasi menggunakan katalis basa. Isolasi minyak mikroalga dilakukan dengan metode ekstraksi soxhlet menggunakan pelarut n-heksan, diperoleh ekstrak minyak dalam fraksi lipid sebanyak 23,793 gram dengan rendemen 5,28 %. Sintesis biodiesel/metil ester asam lemak melalui transesterifikasi dengan variasi katalis KOH dan K2CO3. Metil ester yang terbentuk dianalisis menggunakan 1H NMR. Puncak proton metoksi dari metil ester tampak pada δ ± 3,7 ppm. Luas puncaknya menunjukkan kelimpahan proton metoksi dari metil ester pada penggunaan katalis K2CO3 lebih besar dari penggunaan KOH. Hasil analisis GC-MS menunjukkan komposisi asam lemak penyusun minyak mikroalga adalah asam miristat, palmitoleat, palmitat, linolelaidat, elaidat, dan stearat. Biodiesel B5 mikroalga (blending 5% biodiesel dan 95% solar murni) mempunyai sifat viskositas kinematik 40°C sebesar 4,71 mm2.s-1 dan density 15°C sebesar 862 kg.cm-3. Hasil analisis ini menunjukkan bahwa sifat viskositas kinematik dan density biodiesel B5 mikroalga memenuhi syarat dalam batasan standar Dirjen Migas.
Keywords
Biodiesel; Nannochloropsis sp.; Transesterifikasi; Katalis Basa

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  1. John Sheehan, Terri Dunahay, John Benemann, Paul Roessler, A look back at the US Department of Energy’s aquatic species program: biodiesel from algae, National Renewable Energy Laboratory, 328, (1998)
  2. Diana .J. Bowles, Micro- and macro-algae: utility for industrial applications : outputs from the EPOBIO project, CPL Press, 2007.
  3. D. A. Feinberg, Fuel options from microalgae with representative chemical compositions, in, Solar Energy Research Inst., Golden, CO (USA), 1984.
  4. Yusuf Chisti, Biodiesel from microalgae, Biotechnology Advances, 25, 3, (2007) 294-306 http://dx.doi.org/10.1016/j.biotechadv.2007.02.001
  5. Fangrui Ma, Milford A. Hanna, Biodiesel production: a review1Journal Series #12109, Agricultural Research Division, Institute of Agriculture and Natural Resources, University of Nebraska–Lincoln.1, Bioresource Technology, 70, 1, (1999) 1-15 http://dx.doi.org/10.1016/S0960-8524(99)00025-5
  6. Ulf Schuchardt, Ricardo Sercheli, Rogério Matheus Vargas, Transesterification of vegetable oils: a review, Journal of the Brazilian Chemical Society, 9, 3, (1998) 199-210
  7. Han Xu, Xiaoling Miao, Qingyu Wu, High quality biodiesel production from a microalga Chlorella protothecoides by heterotrophic growth in fermenters, Journal of Biotechnology, 126, 4, (2006) 499-507 http://dx.doi.org/10.1016/j.jbiotec.2006.05.002
  8. ASTM, Annual Book of ASTM Standards 2006 - Section Five - Petroleum Products, Lubricants, and Fossil Fuels - Volume 05.05 (Test Methods for Rating Motor, Diesel, and Aviation Fuels; Catalysts; Manufactured Carbon and Graphite Products), ASTM International, 2006.
  9. D. Darnoko, Munir Cheryan, Kinetics of palm oil transesterification in a batch reactor, Journal of the American Oil Chemists' Society, 77, 12, (2000) 1263-1267 http://dx.doi.org/10.1007/s11746-000-0198-y
  10. John A Kinast, Production of biodiesels from multiple feedstocks and properties of biodiesels and biodiesel/diesel blends, National Renewable Energy Laboratory USA, 2003.
  11. Anjana Srivastava, Ram Prasad, Triglycerides-based diesel fuels, Renewable and Sustainable Energy Reviews, 4, 2, (2000) 111-133 http://dx.doi.org/10.1016/S1364-0321(99)00013-1
  12. Mustafa E. Tat, Jon H. Van Gerpen, The kinematic viscosity of biodiesel and its blends with diesel fuel, Journal of the American Oil Chemists' Society, 76, 12, (1999) 1511-1513 http://dx.doi.org/10.1007/s11746-999-0194-0