KONVERSI ASAM OLEAT MENJADI BIODIESEL MENGGUNAKAN KATALIS HETEROGEN CaO CANGKANG KEPITING TEREMBANKAN ?-Al2O3

  • Y. N. Handayani Program Studi Kimia, Fakultas MIPA, Universitas Udayana, Bali, Indonesia
  • I N. Simpen Program Studi Kimia, Fakultas MIPA, Universitas Udayana, Bali, Indonesia
  • I. M. S. Negara Program Studi Kimia, Fakultas MIPA, Universitas Udayana, Bali, Indonesia

Abstract

Katalis heterogen telah dikembangkan dalam produksi biodiesel. Katalis heterogen CaO dibuat melalui proses kalsinasi dari salah satu sumber CaCO3 yaitu cangkang kepiting. Pembuatan katalis heterogen CaO telah berhasil dilakukan selanjutnya diaktivasi menggunakan larutan KOH dan diembankan ?-Al2O3, secara metode padat-padat. Tujuan penelitian ini adalah mengetahui karakteristik katalis heterogen CaO teraktivasi terembankan ?-Al2O3 (CaO/?-Al2O3) serta mengetahui kinerja katalis tersebut dalam mengkonversi asam oleat menjadi biodiesel. Hasil penelitian menunjukan bahwa katalis dengan karakteristik terbaik ditunjukkan oleh CaO/?-Al2O3 100:7 yang memiliki nilai kebasaan permukaan sebesar 20,9532 mmol g-1 dengan jumlah situs basa 12,6181x1019 atom g-1, dan luas permukaan spesifik sebesar 42,0979 m2/g. Hasil pemanfaatan katalis CaO/?-Al2O3 untuk mengkonversi asam oleat menjadi biodiesel, diperoleh konsentrasi optimum adalah 5%, rasio molar  asam oleat/metanol optimum 1:9, dan waktu reaksi optimum 120 menit mampu mengkonversi asam oleat menjadi biodiesel dengan yield 89,80%.Karakteristik biodiesel hasil konversi memenuhi standar yang ditetapkan SNI 7182-2015, yaitu densitas (40oC) 863 kg/m3, viskositas kinematik (40oC) 4,8 cSt, kadar air 0,03%, dan bilangan iod 35,3562 g I2/100g.


Kata kunci: asam oleat, biodiesel, CaO/?-Al2O3, katalis heterogen.


ABSTRACT


Heterogeneous catalysts are commonly used in biodiesel production. The CaO heterogeneous catalyst can be prepared by calcination process from one source of CaCO3 prepared from crab shell. The preparation of heterogeneous catalyst was successfully carried out by activation with KOH and doped with ?-Al2O3. The purpose of this study is to determine the characteristics of the CaO/?-Al2O3heterogeneous catalyst and the performance of the catalyst for converting oleic acid into biodiesel. The results of this study that the best characteristics of catalyst were shown by CaO/?-Al2O3 100:7, which has a surface basicity was 20,9532 mmol g-1 with active sites 12,6181x1019atom g-1, and specific surface area of ??42.0979 m2/g. The results of using CaO /?-Al2O3 catalyst for converting oleic acid into biodiesel with the optimum concentration was 5%, the optimum oil/methanol molar ratio of 1:9, and the optimum reaction time of 120 minutes for converting oleic acid into biodiesel with the yield of 89.80%. The characteristics of the final biodiesel obtained had met the Indonesian National Standard (SNI 7182-2015) with density (at 40oC), kinematic viscosity (at 40oC), water content, iodine value were 863 kg/m3; 4.8 cSt; 0.039%, and 35.3562 g I2/100g, respectively.


Keywords: CaO/?-Al2O3, oleic acid,biodiesel, heterogeneous catalyst.

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References

Astuti, N. K. D., Simpen, I N., dan Suarsa, I W. 2019. Transesterifikasi Minyak Biji Karet (Hevea brasilliensis) Menggunakan Katalis Heterogen Cangkang Kepiting Limbah Seafood Termodifikasi K2O. Jurnal Kimia. 13 (1): 1-8
Borges, M. E., and Diaz, L. 2012. Recent Devolepments on Heterogeneous Catalysts for Biodiesel Production by Oil Esterification and Transesterification Reaction: A Review. Renewable and Sustainable Energy Reviews. 16: 2839-2849
Climent, M. J., Corma, A., and Iborra, S. 2012. Homogeneous and Heterogeneous Catalysts for Multicomponent Reactions. RSC Advances. 2 (1): 16–58
Helwani, Z., Yoesepha, W., Saputra, E. 2016. Produksi Biodiesel dari Minyak Sawit Off Grade Menggunakan Katalis Na2O/Fe3O4 Pada Tahap Transesterifikasi. Jurnal Online Mahasiswa Fakultas Teknik Universitas Riau. 3 (2): 1-8
Irawati, U., Sunardi, and Suraida. 2013. Synthesis and Characterization Gamma Alumina (γ-Al2O3) From Kaolin of Tatakan, South Kalimantan Based on Temperature Variation of Calcination. A Review. Molecule. 8 (1): 31-42
Kesic, Z., Lukic, I., Zdujic, M., Mojovic, L. and Skala, D. 2016. Calcium Oxide Based Catalysts for Biodiesel Production: A Review. Chem Ing Chem Eng Q. 22 (4): 391-408
Kusmiyati and Sugiharto, A. 2010. Production of Biodiesel from Oleic Acid and Methanol by Reactive Distillation. Bulletin of Chemical Reaction Engineering & Catalysis. 5(1): 1-6
Liu C., L., Pengmei, Yuan Z., F., Yan, W., and Luo. 2009. The Nanometer Magnetic Solid Base Catalyst for Production of Biodiese. Journal Renewable Energy. 35 (7): 1531-1536
Math, M. C., Kumar, S. P., and Chetty, S. V. 2010. Technologies for Biodiesel-Review. Jurnal Eksergi. 10 (2): 15-26
Pan, Y., Shen, X., Yao, L., Bentalib, A., and Peng, Z. 2018. Active Sites in Heterogeneous Catalytic Reaction on Metal and Metal Oxide. Theory and Practice. Journal Catalysts. 8: 478
Renuka, N. K., Shijina, A. V.and Praveen, A. K. 2012. Mesoporous γ-Alumina Nanoparticles: Synthesis, Characterization and Dye Removal Efficiency. Material Letters. 9: 673-635
Roschat, W., Siritanon, T., Yoosuk, B., Sudyoadsuk, T., and Promarak, V. 2017. Rubber Seed Oil as Potential Non-edible Feedstock for Biodiesel Production Using Heterogeneous Catalyst in Thailand. Renewable Energy. 101: 937-944
Santos, E. M., Teixeira, A. P. C., da-Silva, F. G., Cibaka, T.E., M.H., Araujo, M.H., Oliveira, W.X.C., Medeiros, F., Brasil, A.N., de Oliveira, L.S., and Lago, R.M. 2015. New Heterogeneous Catalyst for the Esterification of Fatty Acid Produced by Surface Aromatization/Sulfonation of Oilseed Cake. Fuel. 150: 408–414
Santoso, H., Kristiano, I., dan Setyadi, A., 2013. Pembuatan Biodiesel Menggunakan Katalis Basa Heterogen Berbahan Dasar Kulit Telur. Journal Unpar. 1 (3): 1-29
Simpen, I N., Negara. I M. S. and Jayanto, S.D. 2020. Optimizing Reaction Conditions of Biodiesel Production from Waste Cooking Oil Using Green Solid Catalyst. Journal of Engineering Technologies and Management Research. 7 (08): 65-71
Wei, Z., Xu, C., and Li, B., 2009. Application of Waste Eggshell as Low-Cost Solid Catalyst for Biodiesel Production. Bioresour Technol. 100, 2883-2884.
Published
2022-07-31
How to Cite
HANDAYANI, Y. N.; SIMPEN, I N.; NEGARA, I. M. S.. KONVERSI ASAM OLEAT MENJADI BIODIESEL MENGGUNAKAN KATALIS HETEROGEN CaO CANGKANG KEPITING TEREMBANKAN ?-Al2O3. Jurnal Kimia (Journal of Chemistry), [S.l.], p. 237-243, july 2022. ISSN 2599-2740. Available at: <https://ojs.unud.ac.id/index.php/jchem/article/view/72946>. Date accessed: 05 oct. 2022. doi: https://doi.org/10.24843/JCHEM.2022.v16.i02.p15.
Section
Articles