Harland, Harland and -, Ir. Herry Purnama, M.T., Ph.D. (2019) Optimasi Kualitas Produksi Biodiesel Dari Mikroalga Nannochloropsis Oculata Dan Tetraselmis Chuii Secara Sonikasi Dengan Katalis Potasium Karbonat. Skripsi thesis, Universitas Muhammadiyah Surakarta.
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Abstract
The way out of the energy crisis is to divert national energy needs with the use of new and renewable energy (NRE). Biodiesel is the expected NRE. Algae which has the potential to be used as raw material for making biodiesel is microalgae because it is easier in its cultivation. The microalgae used in this study were Nannochloropsis oculata and Tetraselmis chuii. Microalgae which have been harvested in the form of pasta are extracted to obtain the oil then processed into biodiesel with an ultrasonic device. The transesterification reaction run at 65oC with a 1.00% K2CO3 catalyst. The variables used were the ratio of oil:methanol (1:5; 1:10; 1:15) and reaction time (1 and 3 hours). The biodiesel produced was then tested for acid numbers, density, viscosity, and content of methyl esters by GC-MS test. The amount of N. oculata and T. chuii from cultivation results was 591.75 grams and 460.11 grams. Yield of oil extracted from N. oculata and T. chuii was 46.47% and 39.31%. Biodiesel yield from N. oculata between 72.19% - 74.33% with the highest yield for N. oculata samples treated with oil:methanol (1:10) ratio and 1 hour reaction time (N3 sample) while in T. chuii between 69% - 72.95% with the highest gain for T. chuii samples treated with oil:methanol (1:10) ratio and 1 hour reaction time (T3 sample). In general, biodiesel samples meet SNI Biodiesel in density, viscosity and acid number. The methyl ester content of the GC-MS test in the best biodiesel samples was N. oculata samples treated with oil:methanol (1:5) ratio and 1 hour reaction time (N1 sample) at 68.4% with methyl palmitate content at 38.07% and T. chuii samples treated with oil:methanol (1:15) ratio and 3 hour reaction time (T6 sample) at 79.49% with methyl palmitate content at 49.07%.
| Item Type: | Karya ilmiah (Skripsi) |
|---|---|
| Uncontrolled Keywords: | Biodiesel, Kultivasi, Katalis K2CO3, N. oculata, T. chuii, Ultrasonik |
| Subjects: | T Technology > TP Chemical technology |
| Divisions: | Fakultas Teknik > Teknik Kimia |
| Depositing User: | HARLAND |
| Date Deposited: | 29 Apr 2019 08:35 |
| Last Modified: | 29 Apr 2019 08:35 |
| URI: | http://eprints.ums.ac.id/id/eprint/72334 |
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