Methyl Ester Production from Rice Bran Oil and Methanol with Calcium Carbonate Catalysts Using Esterification Method
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Rice bran oil is a type of oil with high nutritional value from rice bran. However, the free fatty acid content in it can increase by more than 60% with sufficient storage time. Free fatty acids contained in rice bran have the potential to be produced into biodiesel (methyl ester). This research aimed to determine the effect of methanol volume and esterification process time on biodiesel yield and to compare methyl ester yield to standard biodiesel. This research was conducted in two stages, namely rice bran oil extraction and esterification. In the extraction stage, rice bran was extracted with n-hexane for 3 hours at an operating temperature of 65oC. The esterification process was carried out by mixing rice bran oil, methanol with a certain volume (100, 125, 150, 175, 200 mL), and calcium carbonate catalyst as much as 1% of the amount of methanol. Esterification was carried out with time variations of 1; 1.5; 2; 2.5 and 3 hours. The results in the form of rice bran oil were analyzed for the value of the biodiesel yield. The result of rice bran oil was analyzed for initial free fatty acid value. Pure biodiesel product in the form of methyl ester was obtained through separation with glycerol as a by-product. The optimum methyl ester yield was 81.70% at 175 ml methanol volume for 3 hours. The methyl ester results are in accordance with SNI biodiesel for density and kinematic viscosity values.
Putrawan, I.D.G.A., Shobih., Soerawidjaja, T.H., 2006. Stabilisasi Dedak Padi Sebagai Sumber Minyak Pangan. Seminar Nasional Teknik Kimia Indonesia. Palembang.
Goffman, F.D., Pinson, S., Bergman, C., 2003. Genetic diversity for lipid content and fatty acid profile in rice bran. Journal of the American Oil Chemists' Society. 80: 485-490.
Ozgul, S., Turkey, S. 1993. In-situ esterification of rice brand oil with methanol and ethanol. Journal of the American Oil Chemists' Society. 70(2): 143-147.
Ma, F., Hanna, M.A. 1999. Biodiesel production: a review. Journal Series 12109. Bioresourse Technology. 70(1): 1-15.
SBP Board of Consultant and Engineers. 1998. SBP Handbook of Oil Seds, Oils, Fats and Derivatives. New Delhi: Everest Press, Okhla.
Mc Caskill, D.R., Zhang, F., 1999. Use of rice bran oil in foods. Food Technology. 53(2): 50– 54
Pamuji, Lanang, Maulana, Y.H., 2004. Pembuatan Bahan Bakar Biodiesel dari Minyak Goreng Kelapa Sawit dengan Proses Catalytic Cracking dan Katalis Zeolit. Research report. Chemical Engineering Department. Universitas Diponegoro Semarang.
Gerpen, J.V., 2005. Biodiesel processing and production. Fuel Processing Technology. 86: 1097-1107.
Badan Standardisasi Nasional. 2015. SNI 7182-2015: Biodiesel. Jakarta.
Lopresto, C.G., Naccarato, S., Albo, L., DePaola, M.G., Chakraborty, S., Curcio, S. and Calabrò, V. 2015. Enzymatic transesterification of waste vegetable oil to produce biodiesel. Ecotoxicology and Environmental Safety. 121: 229–235.
Zhang, Y., Dub, M.A., McLean, D.D., Kates, M. 2003. Biodiesel production from waste cooking oil: 1. Process design and technological assessment. Bioresource Technology. 89(1): 1–16.
Abdullah, A., Jaya, J.D., Rodiansono, R. 2010. Optimasi jumlah KOH dan NaOH pada pembuatan biodiesel dari minyak kelapa sawit menggunakan kopelarut. Jurnal Berkala Ilmiah Sains dan Terapan Kimia. 4(1): 79-89.
Anonim. 2007. ASTM D6751-07b: Specification for biodiesel (B100).
Prihanto, A., Pramudono, B., Santosa, 2013. H. Peningkatan yield biodisel dari minyak biji nyamplung melalui transesterifikasi dua tahap. Jurnal Momentum. 9(2): 46-53.
Aznurya, M., Zikria, A., Junaidia, R., Lupikawaty, M., Oktariyensia, C. 2022. Pengaruh Metanol dalam Produksi Biodiesel dari Tamanu Oil Menggunakan Katalis Lipase. Jurnal Selulosa. 12(1): 33-40.
Daryono, E.D., Rahman, F.F.A., Zukhriyah. 2022. Penggunaan metanol sisa reaksi sebagai reaktan pada proses transesterifikasi minyak kelapa sawit menjadi biodiesel. Jurnal Teknologi. 14(2): 155-162.
Dharsono, W., Oktari, Y. S. and Purbasari, A. 2013. Proses pembuatan biodiesel dari dedak dan metanol dengan esterifikasi insitu, Jurnal Teknologi Kimia dan Industri. 2(2): 33-39.
Taslim, Parinduri, S.Z.D.M., Ningsih, P.R.W. 2017. Pembuatan biodiesel dari minyak dedak padi dengan reaksi transesterifikasi menggunakan katalis heterogen zeolit alam yang dimodifikasi dengan KOH. Jurnal Teknik Kimia USU. 6(1): 12-18.
Sulistianingsih, Wahyuningtyas, D. 2019. Optimasi pembuatan biodiesel dari minyak jelantah dengan katalisator kalsium oksida (CaO) dengan proses metanolisis (variabel suhu reaksi). Jurnal Inovasi Proses. 4(2): 81-87.
Suleman, N., Abas, Paputungan, M. 2019. Esterifikasi dan transesterifikasi stearin sawit untuk pembuatan biodiesel. Jurnal Teknik, 17(1): 66–77.
Ristianingsih, Y., Hidayah, N., Sari, F.W. 2015. Pembuatan biodiesel dari crude palm oil (CPO) sebagai bahan bakar alternatif melalui proses transesterifikasi langsung. Jurnal Teknologi Agro-Industri. 2(1): 38–46.
Rezeika, S. H., Ulfin, I., Ni’mah, Y.L. 2018. Sintesis biodiesel dari minyak jelantah menggunakan katalis NaOH dengan variasi waktu reaksi transesterifikasi dan uji performanya dengan mesin diesel. Akta Kimia Indonesia. 3(2): 175–189.
