NADILA, NINI (2016) SINTESIS MIKROALGA CHLORELLA VULGARIS MENJADI BIODIESEL MELALUI PROSES ESTERIFIKASI DAN TRANSESTERIFIKASI (STUDI METODE EKSTRAKSI LIPID DAN PENGARUH KONSENTRASI KATALIS KOH). Other thesis, POLITEKNIK NEGERI SRIWIJAYA.
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Abstract
Increasing energy needs cause diminishing energy resources. This encourages the search for renewable energy sources to anticipate scarcity. One of the new energy source is microalgae. Microalgae have a high variation of species and have great potential to be developed as chemical products. Microalga has been developed as a potential sources of biodiesel to replace petroleum fuels derived from fossils. . One of the species of microalgae which is Chlorella Vulgaris is known for containing high lipid content from 28 to 32%. Biodiesel (fatty ascid methyl ester, FAME) made from vegetable oil ( lipid, usually in the form of triacylglycerol, TG) is one of renewable energy as an alternative for petroleum diesel fuel. The steps of the research for making biodiesel including extraction of microalgae oil, esterification and transesterification. This study aims to examine the best method of microalga lipid extraction and to determine KOH concentration on the transesterification. The purpose of this study was to find an extraction method that could gain rendemen of lipid Chorella Vulgaris. Chorella Vulgaris was extracted by macceration and soxhletation methid using n-heksane as solvent. Operation conditions used was 20 gr dry microalgae, temperature proccess ± 65 oC, H2SO4 to oil weight ratio of 2%, and the variables that analysed was the effect of KOH as catalyst (1%, 1.5%, 2% and 2.5% from amount of oil and methanol) in the transesterification step. extraction results include the maximum rendemen of the lipid algae is 44,81 % with soxhletation. The result showed that increasing KOH concentration (1-2%), enhanced the biodiesel conversion (%). The highest conversion of biodiesel was achieved by using 2% KOH (w/w) with 24,81% biodiesel conversion. Characteriszation of all methyl ester product that are variation of KOH catalyst concentration fulfill standart of biodiesel standar SNI. 04-7182-2006, like flash point (152 – 168oC) and acid’s value (0,7293 – 0,8432 mg KOH/ gram). The result of GCMS showed oleat methyl ester is the most dominant lipid.
| Item Type: | Thesis (Other) |
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| Uncontrolled Keywords: | Biodiesel, Chlorella Vulgaris, KOH |
| Subjects: | T Technology > TP Chemical technology |
| Divisions: | Chemical Engineering > Undergraduate Theses |
| Depositing User: | Mrs Trisni Handayani |
| Date Deposited: | 28 Feb 2017 02:41 |
| Last Modified: | 28 Feb 2017 02:41 |
| URI: | http://eprints.polsri.ac.id/id/eprint/3316 |
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