Arang Kulit Biji Kakao (Theobroma cacao L) sebagai Adsorben untuk Menurunkan Kadar Asam Lemak Bebas pada Pembuatan Biodiesel dari Minyak Jelantah
Keywords:Biodiesel, Cocoa Bean Husk, Free Fatty Acid, Used Cooking Oil
Indonesia as one of the largest producing and exporting countries of crude palm oil (CPO). However, Indonesia still has not utilized the potential of the waste that generated by using CPO as cooking oil, namely used cooking oil. The high content of free fatty acids (FFA) in used cooking oil will cause the saponification reaction and interfere the processing into biodiesel. Cocoa bean shell charcoal (Theobroma cacao L) has a K2CO3 content similar to its commercial product, and contains some traces of silicates and sulfates so that it can increase the efficiency of reducing free fatty acids. In this study, tests were carried out to reduce FFA levels in used cooking oil using charcoal from cocoa bean husks activated with HCl, varying the concentrations of 6, 8 and 10 Molar, as well as the temperature treatment during the process of mixing used cooking oil with activated charcoal adsorbent, which was 75 , 100, and 150°C. The best FFA reduction results were found in the A3T2 reactor which reached 80%, where the best HCl concentration was 10 Molar and the temperature of the mixing process with the adsorbent was 100°C and produced a biodiesel yield of 75%. The quality of the biodiesel produced complies with SNI 7182-2015 standards, 867 kg/m3 of density, 0.5 mg KOH/g of acid number, 1.52 cSt of kinematic viscosity, 48.081 MJ/kg of calorivic value and 143.99%- mass of methyl ester content.
Badan Pusat Statistik - Indonesia, "Statistik Kelapa Sawit Indonesia 2020," Badan Pusat Statistik, Jakarta, 2021.
Badan Pengelola Dana Perkebunan Kelapa Sawit, "Annual Report," BPDP, Jakarta, 2021.
Badan Pengelola Dana Perkebunan Kelapa Sawit, "bpdp.or.id," Badan Pengelola Dana Perkebunan Kelapa Sawit, 22 March 2022. [Online]. Available: https://www.bpdp.or.id/neraca-massa-pengolahan-minyak-sawit. [Accessed 8 April 2023].
Badan Pengelola Dana Perkebunan Kelapa Sawit, "bpbd.or.id," Badan Pengelola Dana Perkebunan Kelapa Sawit, 22 March 2022. [Online]. Available: https://www.bpdp.or.id/proses-pengolahan-cpo-menjadi-minyak-goreng-di-industri-refinery. [Accessed 8 April 2023].
G. Knothe, J. V. Gerpen and J. Krahl, The handbook of Biodiesel, Illinois: AOCS Press, 2005.
S. Nurdin, N. A. Rosnan, N. S. Ghazali, J. Gimbun, A. H. Nour and S. F. Haron, "Economical Biodiesel Fuel Synthesis from Castor Oil using Mussel Shell-Base Catalyst (MS-BC)," Energy Procedia, vol. 79, pp. 576-583, 2015.
Badan Pusat Statistik, "Produksi Tanaman Perkebunan Menurut Komoditas dan Kabupaten/Kota (Ton), 2020-2021," [Online]. Available: https://jatim.bps.go.id/indicator/54/563/1/produksi-tanaman-perkebunan-menurut-komoditas-dan-kabupaten-kota.html. [Accessed 8 April 2023].
S. N. Wulan, "Kemungkinan Pemanfaatan Limbah Kulit Buah Kakao (Theobroma Cacao, L) Sebagai Sumber Zat Pewarna (Β-Karoten)," Jurnal Teknologi Pertanian, vol. 2, pp. 22-29, 2001.
D. Rachmat, "Pemanfaatan Kulit Biji Kakao (Theobroma Cacao L.) Sebagai Arang Aktif Dan Katalis Pada Proses Produksi Biodiesel Dari Minyak Jelantah," Scemantic Scholar, 2017.
Badan Standardisasi Nasional, "SNI 7182-2015 Biodiesel," BSNI, Jakarta, 2015.
American Oil Chemists Society, "AOCS Official Method Ca 5a-40 Reapproved 1997 'Free Fatty Acid'," AOCS, Urbana, 1997.
American Society for Testing and Materials, "ASTM D1298-99 (Reapproved 2005) Standard Test Method for Density, Relative Density (Spesific Gravity), or API Gravity of Crude Petroleum and Liquid Petroleum Products by Hydrometer Method," ASTM, West Chonshohocken, 2005.
American Society for Testing and Materials, "ASTM D974-14 Standard Method for Acid and Base Number by Color-Indicator Titration," ASTM, West Conshohocken, 2014.
S. Ketaren, Pengantar Teknologi Minyak dan Lemak Pangan, Jakarta: UI Press, 1986.
S. Wibowo, W. Syafi and G. Pari, "Karakterisasi Permukaan Arang Aktif Tempurung Biji Nyamplung," Makara, Teknologi, vol. 15, pp. 17-24, 2011.
M. Al-Ghouri, M. Khraisheh, M. Ahmad and S. Allen, "Thermodynamic behaviour and the effect of temperature on the removal of dyes from aqueous solution using modified diatomite: A kinetic study," Journal of Colloid and Interface Science, vol. 287, no. 1, pp. 6-13, 2005.
O. S. Ayanda, O. S. Fatoki, F. A. Adekola, E. Suana and B. J. Ximba, "Comparative Performance Evaluation Of Activated Carbon And Fly Ash / Activated Carbon Composite For Triphenyltin Chloride Removal By Adsorption," International Journal of Nano Corrosion Science and Engineering, vol. 1, no. 1, pp. 1-12, 2014.
L. H. Rahayu and S. Purnavita, "Pengaruh Suhu Dan Waktu Adsorpsi Terhadap Sifat Kimia-Fisika Minyak Goreng Bekas Hasil Pemurnian Menggunakan Adsorben Ampas Pati Aren Dan Bentonit," Momentum, vol. 10, no. 2, pp. 35-41, 2014.
S. A. Sari, "Effect of Dragon Fruit Juice Addition on Changes in Peroxide Numbers and Acid Numbers of Used Cooking Oil," Indonesian Journal of Chemical Science and Technology (IJCST-UNIMED), vol. 02, pp. 136-141, 2019.
R. Prihandana and R. Hendroko, Energi Hijau, Pilihan Bijak menuju Negeri Mandiri Energi, Jakarta: Penebar Swadaya, 2008.
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