Tinjauan Perkembangan Proses Katalitik Heterogen dan Non-Katalitik untuk Produksi Biodiesel
Abstract
Abstract
Biodiesel is still expected to be an alternative fuel other than petroleum. Therefore, intensive research is being done by researchers in the world to develop biodiesel production process that is more efficient, economical and environmentally friendly. Among them is by developing a catalytic and non-catalytic process. The heterogeneous catalytic process is of particular concern with many promising results and is expected to address the current lack of homogeneous catalytic processes. In Indonesia, many natural catalyst sources have been investigated into potential heterogeneous catalyst. The non-catalytic process also provides a reasonably reliable process expectation of course with its various challenges. Both heterogeneous catalytic processes and non-catalytic processes are believed to be potential processes that can be applied in the near future. The development of the results and the challenges of these two processes, therefore, is reviewed in this work as an innovative biodiesel process technology research opportunity.
Abstrak
Biodiesel masih diharapkan menjadi bahan bakar alternatif selain dari minyak bumi. Oleh karenanya penelitian yang intensif tengah dilakukan para peneliti di dunia untuk mengembangkan proses produksi biodiesel yang lebih efisien, ekonomis dan ramah lingkungan. Diantaranya adalah dengan mengembangkan proses secara katalitik dan non-katalitik. Proses katalitik heterogen menjadi perhatian khusus dengan banyaknya hasil penelitian yang menjanjikan dan diharapkan dapat mengatasi kekurangan proses katalitik homogen saat ini. Di Indonesia berbagai sumber katalis alami telah diteliti untuk dijadikan katalis heterogen. Namun, proses non-katalitik juga memberikan harapan proses yang cukup bisa diandalkan tentu dengan berbagai tantangannya. Baik proses katalitik heterogen maupun proses non-katalitik diyakini sebagai proses potensial yang dapat diterapkan dalam waktu dekat ini. Oleh karena itu, perkembangan hasil dan berbagai tantangan dari kedua proses tersebut diulas dalam tinjauan ini sebagai peluang penelitian teknologi proses biodiesel yang inovatif.
References
Alamsyah, R., E.H. Lubis, S. Heryani. 2010. Produksi biodiesel dari bahan baku minyak jelantah dengan menggunakan abu tandan aren sebagai katalis. Warta IHP/ Journal of Agro-Based Industry 27(1):47-58.
Arata, K. 1996. Preparation of superacids by metal oxides for reactions of butanes and pentanes. Appl Catal A-Gen 146:3-32.
Armalita, R.D., S. Bahri, Yusnimar. 2015. Pembuatan biodiesel dari minyak biji bintaro dengan reaksi transesterifikasi dan katalis lempung. Jom FTEKNIK 2(2):1-6.
Awaluddin, A., Saryono, S. Nelvia, Wahyuni. 2009. Faktor-faktor yang mempengaruhi produksi biodiesel dari minyak sawit mentah menggunakan katalis padat kalsium karbonat yang dipijarkan. Jurnal Natur Indonesia 11(2):129-134.
Benson, T.J., R. Hernandez, W.T. French, E.G. Alley, W.E. Holmes. 2009. Elucidation of the catalytic cracking pathway for unsaturated mono-, di-, and triacylglycerides on solid acid catalysts. JMol Catal
A:Chem 303:117-123.
Bunyakiat, K., S. Makmee, R. Sawangkeaw, S. Ngamprasertsith. 2006. Continuous production of biodiesel via transesterification from vegetable oils in supercritical methanol. Energy Fuels 20:812-817.
Cai, Y., J.A. Nieweg, W.A. Turner, C.K. Wilkinson. 2011. Systems and processes for biodiesel production. Patent No. US 2011/0054200 A1.
Cao, W., H. Han, J. Zhang. 2005. Preparation of biodiesel from soybean oil using supercritical methanol and cosolvent. Fuel 84:347-351.
Corma, A. 1997. Solid acid catalysts. Curr Opin Solid St
M 2:63-75.
Danuthai, T., S. Jongpatiwut, T. Rirksomboon, S. Osuwan, D.E. Resasco. 2009. Conversion of methylesters to hydrocarbons over an H-ZSM5 zeolite catalyst. Appl Catal A-Gen 361:99-105.
Darnoko, D., M. Cheryan. 2000. Kinetics of palm oil transesterification in a batch reactor. Journal Am Oil Chem Soc 77:1263-1267.
Demirbas, A. 2002. Biodiesel from vegetable oils via transesterification in supercritical. Energy Convers Manage 43:2349-2356.
Demirbas, A. 2008. Studies on cottonseed oil biodiesel prepared in non-catalytic SCF conditions. Bioresour Technol 99:1125-1130.
Demirbas, A. 2009a. Political, economic and environmental impacts of biofuels: A review. Appl Energy 86:S108-S117.
Demirbas, A. 2009b. Progress and recent trends in biodiesel fuels. Energy Convers Manage 50:14-34.
Devitria, R, Nurhayati, Anita S. 2013. Sintesis biodiesel dengan katalis heterogen lempung cengar yang diaktivasi dengan NaOH: pengaruh waktu reaksi dan rasio molar minyak:metanol. Jurnal Ind Che Acta 3(2):39-44.
Diasakou, M., A. Louloudi, N. Papayannakos. 1998. Kinetics of the non-catalytic transesterification of soybean oil. Fuel 77:1297-1302.
Dwitama, M.I., M. Nazib, O.C. Sitepu, D.A.P. Suandi, I.N. Simpen. 2016. Konversi minyak biji malapari (Pongamia Pinnata L.) menjadi biodiesel melalui pemanfaatan katalis heterogen abu sekam padi
termodifikasi Li. Jurnal Kimia 10(2):236-244.
Feng, Y., B. He, Y. Cao, J. Li, M. Liu, F. Yan. 2010. Biodiesel production using cation-exchange resin as heterogeneous catalyst. Bioresour Technol 101:1518- 1521.
Firdaus, L.H., A.R. Wicaksono, Widayat. 2013. Pembuatan katalis h-zeolit dengan impregnasi KI/ KIO3 dan uji kinerja katalis untuk produksi biodiesel. Jurnal Teknologi Kimia dan Industri 2(2):148-154.
Forster, P., V. Ramaswamy, P. Artaxo, T. Berntsen, R. Betts. 2007. Climate change 2007-the physical science basis: contribution of working group I to the fourth assessment report of the intergovernmental panel on climate change. Cambridge University
Press, New York (US):388-405.
Freedman, B., R.O. Butterfield, E.H. Pryde. 1986. Transesterification kinetics of soybean oil. Jurnal Am Oil Chem Soc 63:1375-1380.
Fukuda, H., A. Kondo, H. Noda. 2001. Biodiesel fuel production by transesterification of oils. Jurnal Biosci Bioeng 92:405-416.
Furuta, S., H. Matsuhashi, K. Arata. 2004. Biodiesel fuel production with solid superacid catalysis in fixed bed reactor under atmospheric pressure. Catal Commun 5:721-723.
Garcia, C.M., S. Teixeira, L.L. Marciniuk, U. Schuchardt. 2008. Transesterification of soybean oil catalyzed by sulfated zirconia. Bioresour Technol 99:6608-6613.
Georgogianni, K.G., M.G. Kontominas, E. Tegou, D. Avlonitis, V. Gergis. 2007. Biodiesel production: reaction and process parameters of alkali-catalyzed transesterification of waste frying oils. Energy Fuels 21:3023-3027.
Han, H., W. Cao, J. Zhang. 2005. Preparation of biodiesel from soybean oil using supercritical methanol and CO2 as co-solvent. Proces Biochem 40:3148-3151.
Han, M., W. Yi, Q. Wu, Y. Liu, Y. Hong, D. Wang. 2009. Preparation of biodiesel from waste oils catalyzed by a Brønsted acidic ionic liquid. Bioresour Technol 100,2308-2310.
Hawash, S., N. Kamal, F. Zaher, O. Kenawi, G.E.l. Diwani. 2009. Biodiesel fuel from Jatropha oil via noncatalytic supercritical methanol transesterification.Fuel 88:579-582.
He, H., T. Wang, S. Zhu . 2007. Continuous production of biodiesel fuel from vegetable oil using supercritical methanol process. Fuel 86:442-447.
Husin, H., Mahidin, Marwan. 2011. Studi penggunaan katalis abu sabut kelapa, abu tandan sawit dan K2CO3 untuk konversi minyak jarak menjadi biodiesel. Reaktor 13(4):254-261.
Islam, A., Taufiq- Y.H. Yap, C.M. Chu, E.S. Chan, P. Ravindra. 2012. Synthesis and characterization of millimetric gamma alumina spherical particles by oil drop granulation method. Jurnal Porous Mater 19:807-817.
Jain, S., S.M. Sharma. 2010. Biodiesel production from Jatropha curcas oil. Renew Sustain Energy Rev.14:3140-3147.
Joelianingsih, H. Maeda, S. Hagiwara, H. Nabetani, Y. Sagara, H.S. Tatang, A.H. Tambunan, A . Kamarudin. 2008. Biodiesel fuels from palm oil via the noncatalytic transesterification in a bubble column reactor at atmospheric pressure: a kinetic study. Renew
Energy 33(7):1629-1636.
Juliana, I., I.A.G. Widihati, O. Ratnayani. 2016. Karakterisasi katalis batu padas ledgestone teraktivasi asam dan aplikasinya pada pembuatan biodiesel dari minyak jelantah. Jurnal Kimia 10(1):32-42.
Kartika, D., S. Widyaningsih. 2012. Konsentrasi katalis dan suhu optimum pada reaksi esterifikasi menggunakan katalis zeolit alam aktif (zah) dalam pembuatan biodiesel dari minyak jelantah. Jurnal
Natur Indonesia 14(3):219-226.
Kawashima, A., K. Matsubara, K. Honda. 2009. Acceleration of catalytic activity o calcium oxide or biodiesel production. Bioresour Technol 100:696-700.
Kiss, A.K., F. Omota, A.C. Dimian, G. Rothenberg. 2006. Heterogeneous acid catalysts for biodiesel production: current status and future challenges. Top Catal 40:141-150.
Kiss, F.E., M. Jovanovic, G.C. Boškovic´. 2010. Economic and ecological aspects of biodiesel production over homogeneous and heterogeneous catalysts. Fuel Process Technol 91:1316-1320.
Kitakawa, N.S., H. Honda, H. Kuribayashi, T. Toda, T. Fukumura, T. Yonemoto. 2007. Biodiesel production using anionic ion-exchange resin as heterogeneous catalyst. Bioresour Technol 98:416-421.
Knothe, G., J.V. Gerpen, J. Krahl. 2005. The biodiesel handbook. Illinois (US): AOCS Press. hlm 34, 35, 164, 269, 270-274.
Kouzu, M., T. Kasuno, M. Tajika, Y. Sugimoto, S. Yamanaka, J. Hidaka. 2008. Calcium oxide as a solid base catalyst for transesterification of soybean oil and its application to biodiesel production. Fuel 87:2798-2806.
Kouzu, M., S.Y. Yamanaka, J.S. Hidaka, M. Tsunomori. 2009. Heterogeneous catalysis of calcium oxide used for transesterification of soybean oil with refluxing methanol. Applied Catal A: General 355:94-99.
Kumar, A., R. Valoyi, A. Ochieng, M. Onayango. 2002. Acid-Base transesterification of oil with high free fatty acid content. J Biosci Bioeng 67:77-82.
Kusdiana, D., S. Saka. 2001. Kinetics of transesterification in rapeseed oil to biodiesel fuel as treated in supercritical methanol. Fuel 80:693-698.
Kusdiana, D., S. Saka. 2004. Effects of water on biodiesel fuel production by supercritical methanol treatment. Bioresour Technol 91:289-295.
Lam, M.K., K.T. Lee, A.R. Mohamed. 2009. Sulfated tin oxide as solid superacid catalyst for transesterification of waste cooking oil: an optimization study. Appl Catal B 93:134-139.
Lam, M.K., K.T. Lee, A.R. Mohamed. 2010. Homogeneous, heterogeneous and enzymatic catalysis for transesterification of high free fatty acid oil (waste cooking oil) to biodiesel: A review. Biotechnol Adv 28:500-518.
Lee, D.W., Y.M. Park, K.Y. Lee. 2009. Heterogeneous base catalysts for transesterification in biodiesel synthesis. Catal Surv Asia 13:63-67.
Lesbani, A., K.M. Risma, R. Mohadi. 2013. Produksi biodiesel melalui reaksi transesterifikasi minyak jelantah dengan katalis cangkang kerang darah (Anadara granosa) hasil dekomposisi. Indonesian
E-Journal of Applied Chemistry 1(2):1-7.
Leung, D.Y.C., Y. Guo. 2006. Transesterification of neat and used frying oil: optimization for biodiesel production. Fuel Process Technol 87:883-890.
Li, Y., X.D. Zang, L. Sun, M. Xu, W.G. Zhou, X.H. Liang. 2010. Solid superacid catalyzed fatty acid methyl esters production from acid oil. Appl Energ 87:2369-2373.
Lin, V.S., Y. Cai, C. Kern, J.I. Dulebohn, J.A. Nieweg. 2009. Solid catalyst system for biodiesel production. Patent No. US 2009/0112007 A1.
Liu, X., H. He, Y. Wang, S. Zhu, X. Piao. 2008. Transesterification of soybean oil to biodiesel using CaO as solid base catalyst. Fuel 87:216-221.
Lou, W.Y., M.H. Zong, Z.Q. Duan. 2008. Efficient production of biodiesel from high free fatty acid-containing waste oils using various carbohydrate derived solid acid catalysts. Bioresour Technol 99:8752-8758.
Lo’pez, D.E., Jr. J.G. Goodwin, D.A. Bruce, E. Lotero. 2005. Transesterification of triacetin with methanol on solid acid and base catalysts. Appl Catal A-Gen 295:97-105.
Lotero, E., Y. Liu, D.E. Lopez, K. Suwannakarn, D.A. Bruce, Jr. J.G. Goodwin. 2005. Synthesis of biodiesel via acid catalysis. Ind Eng Chem Res 44:5353-5363. Ma, F., M.A. Hanna. 1999. Biodiesel production: a review. Bioresour Technol 70:1-15.
Madras, G., C. Kolluru, R. Kumar. 2004. Synthesis of biodiesel in supercritical fluids. Fuel 83:2029-2033.
Maeda, Y., L.T. Thanh, K. Imamura, K. Izutani, K. Okitsu, L.V. Boi, P.N. Lan, N.C. Tuan, Y.E. Yoo, N. Takenaka. 2010. New technology for the production of biodiesel fuel. Green Chem 13:1124-1128.
Marchetti, J.M., 2013. Influence of economical variables on a supercritical biodiesel production process. Energy Convers Manage 75:658-663.
Mardina, P., A. Prayudi, M. Chumaidi. 2013. Pengaruh abu pelepah pisang sebagai katalisator basa padat terhadap angka asam produk biodiesel. Konversi 2(1):14-20.
McNeff, C.V., L.C. McNeff, B. Yan, D.T. Nowlan, M. Rasmussen. 2008. A continuous catalytic system for biodiesel production. Applied Catal A: Gen 343:39-48.
Meher, L.C., D.V. Sagar, S.N. Naik. 2006. Technical aspects of biodiesel production by tranesterification—a review. Renew Sustain Energy Rev 10:248-268.
Padil, S. Wahyuningsih, A. Awaluddin. 2010. Pembuatan biodiesel dari minyak kelapa melalui reaksi metanolisis menggunakan katalis CaCO3 yang dipijarkan. Jurnal Natur Indonesia 13(1): 27-32.
Park, Y.M., D.W. Lee, D.K. Kim, J.S. Lee, K.Y. Lee. 2008. The heterogeneous catalyst system for the continuous conversion of free fatty acids in used vegetable oils for the production of biodiesel. Catal Today 131:238-243.
Park, Y.M., J.Y. Lee, S.H. Chung, I.S. S.Y. Park, D.K. Lee, Kim. 2010. Esterification of used vegetable oils using the heterogeneous WO3/ZrO2 catalyst for production of biodiesel. Bioresour Technol 101:S59-S61.
Permatasari, A., W. Mayangsari, I. Gunardi. 2013. Pembuatan biodiesel dari minyak nyamplung (Calophyllum Inophyllum L) dengan reaksi transesterifikasi menggunakan katalis K2O/HZa berbasis zeolit alam. Jurnal Teknik Pomits 2(2):F290-F295.
Petchmala, A., N. Laosiripojana. 2010. Transesterification of palm oil and esterication of palm fatty acid in near and super-critical methanol With SO4–ZrO2 catalysts. Fuel 89:2387-2392.
Pinnarat, T., P.E. Savage. 2008. Assessment of noncatalytic biodiesel synthesis using supercritical reaction conditions. Ind Eng Chem Res 47:6801-6808.
Puspitaningati, S.R., R. Permatasari, I. Gunardi. 2013. Pembuatan biodiesel dari minyak kelapa sawit dengan menggunakan katalis berpromotor ganda berpenyangga γ-alumina (CaO/KI/γ-Al2O3) dalam reaktor fluidized bed. Jurnal Teknik Pomits
2(2):F193-F197.
Rahmawati, D.A., D. Intaningrum, Istadi. 2013. Pembuatan dan karakterisasi heterogen SO4 2-- ZnO dan SO4 2-/ZnO metode kopresipitasi dan impregnasi untuk produksi biodiesel dari minyak kedelai. Jurnal Teknologi Kimia dan Industri 2(4):243-252.
Rathore, V., G. Madras. 2007. Synthesis of biodiesel from edible and non-edible oils in supercritical alcohols and enzymatic synthesis in supercritical carbon dioxide. Fuel 86:2650-2659.
Ritonga, M.Y., A. Putra. 2015. Pembuatan biodiesel dari RBDPO dengan katalis cangkang kepah. Jurnal Teknik Kimia USU, Article in Press hlm. 1-7.
Saifuddin, N., A. Samiuddin, P. Kumaran. 2015. A Review on Processing Technology for Biodiesel Production. Trends in Applied Sciences Research 10:1-37.
Saputra, L., N. Rakhmah, H.T. Pradita, Sunardi. 2012. Produksi biodiesel dari minyak jelantah dengan cangkang bekocot (Achatina fulica) sebagai katalis heterogen. Prestasi 1(2):118-125.
Schuchardt, U., R. Sercheli, R. Vargas. 1998. Transesterification of vegetable oils: a review. Journal Braz Chem Soc 9:199-210.
Shu, Q., Z. Nawaz, J. Gao, Y. Liao, Q. Zhang, D. Wang. 2010. Synthesis of biodiesel from a model waste oil feedstock using a carbon-based solid acid catalyst. Reaction and separation. Bioresour Technol 101:5374-5384.
Silitonga, A.S., A.E. Atabani, T.M.I. Mahlia, H.H. Masjuki, I.A. Badruddin, S. Mekhilef. 2011. A review on prospect of Jatropha curcas for biodiesel in Indonesia. Renew Sust Energ Rev 15:3733-3756.
Silva, C., T.A. Weschenfelder, S. Rovani, F.C. Corazza, M.L. Corazza, C. Dariva, J.V. Oliveira . 2007.
Continuous production of fatty acid ethyl esters from soybean oil in compressed ethanol. Ind Eng Chem Res 46:5304-5309.
Sinta, T., D. Tarigan, C. Saleh. 2016. Optimasi suhu reaksi transesterifikasi pada minyak jerami padi (Oryza sativa L.) menjadi biodiesel dengan menggunakan katalis CaO dari kulit telur ayam. Jurnal Kimia Mulawarman 14(1):19-23.
Sitinjak, J.F.M., Z. Helwani, E. Saputra. 2016. Penggunaan Na2O/fly ash sebagai katalis pada tahap transesterifikasi minyak sawit off-grade menjadi biodiesel. Jom FTEKNIK 3(1):1-8.
Sitorus, S., A. Murtiasih. 2015. Pemanfaatan abu sabut kelapa sebagai katalis basa dalam pembuatan biodiesel dari minyak biji jarak pagar (Jatropha curcas. L). Jurnal Riset Teknologi Indonesia 9(1):50-55.
Sivasamy, A., K.Y. Cheah, P. Fornasiero, F. Kemausuor, S. Zinoviev, S. Miertus. 2009. Catalytic applications in the production of biodiesel from vegetable oils. Chem Sus Chem 2:278-300.
Song, E.S., J.W. Lim, H.S. Lee, Y.W. Lee. 2008. Transesterification of RBD palm oil using supercritical methanol. Jurnal Supercrit Fluids 44:356-363.
Song, C., Y. Qi, T. Deng, X. Hou, Z. Qin. 2010. Kinetic model for the esterification of oleic acid catalyzed by zinc acetate in subcritical methanol. Renew Energy 35: 625-628.
Sriatun, Taslimah, L. Suyati. 2015. Pemanfaatan katalis silika alumina dari bagasse pada pembuatan biodiesel dari minyak goreng sisa pakai. Jurnal Teknologi Industri Pertanian 25(1):35-42.
Supriadi, A., K. Oktaviani, A.W. Kencono, B.E. Prasetyo, T.N. Kurniasih, F.K. Sunaryo, C.B. Kurniadi, Y. Alwendra, R. Aprillia, I. Setiadi, Q. Rabbani, D. Anggreani. 2016. Data inventory emisi GRK sektor energi. Jakarta Pusat (ID): Pusdatin ESDM. ISBN:978-
602-0836-22-5.
Susila, I.W. 2009. Pengembangan proses produksi biodiesel biji karet metode non-katalis superheated methanol pada tekanan atmosfir. Jurnal Teknik Mesin 11(2):115-124.
Syamsuddin, Y., H. Husin. 2010. Pembuatan katalis padat
ZrO2/Al2O3 untuk produksi biodiesel dari minyak jarak.
Jurnal Rekayasa Kimia dan Lingkungan 7(3):112-117.
Tanabe, K., T. Yamaguchi. 1994. Acid-base bifunctional catalysis by ZrO2 and its mixed oxides. Catal Today 20:185-197.
Taufiq-Yap, Y.H., H.V. Lee, M.Z. Hussein, R. Yunus. 2011. Calcium-based mixed oxide catalysts for methanolysis of Jatropha curcas oil to biodiesel. Biomass Bioenergy 35:827-834.
Tesser, R., L. Casale, D. Verde, M.D. Serio, E. Santacesaria. 2010. Kinetics and modeling of fatty acids esterification on acid exchange resins. Chemical Engineering Journal 157:539-550.
Thanh, L.T., K. Okitsu, Y. Sadanaga, N. Takenaka, Y. Maeda, H. Bandow. 2010. Ultrasound-assisted production of biodiesel fuel from vegetable oils in a small scale circulation process. Bioresour Technol
101:639-645.
Thanh, L.T., K. Okitsu, L.V. Boi, Y. Maeda. 2012. Catalytic technologies for biodiesel fuel production and utilization of glycerol: a review. Catalysts 2:191-222.
Utami, I., R. Solikhah, I. Istadi. 2012. Sintesa katalis super asam SO4 2-/ ZnO untuk produksi biodiesel dari minyak kelapa sawit. Jurnal Teknologi Kimia dan Industri 1(1):69-78.
Varma, M.N., G. Madras. 2007. Synthesis of biodiesel from castor oil and linseed oil in supercritical fluids. Ind Eng Chem Res 46:1-6.
Venkateswarulu, T.C., C.V. Ravi Teja, K.V. Prabhaker, D.J.
Babu, A.R. Reddy, M. Indira, A. Venkatanarayana.
2014. A review on methods of transesterification of oils and fats in biodiesel formation. Int Journal Chemtech Res 6(4):2568-2576.
Vieitez, I., C. Da. Silva, G.R. Borges, F.C. Corazza, J.V. Oliveira, M.A. Grompone, I. Jachmanian. 2008. Continuous production of soybean biodiesel in supercritical ethanol-water mixtures. Energy Fuels
22:2805-2809.
Wendi, V. Cuaca, Taslim. 2015. Pengaruh suhu reaksi dan jumlah katalis pada pembuatan biodiesel dari limbah lemak sapi dengan menggunakan katalis heterogen CaO dari kulit telur ayam. Jurnal Teknik Kimia USU, Article in Press hlm. 1-7.
Wicakso, D.R. 2011. Sintesis biodiesel dari crude palm oil dengan katalis alumina hasil recovery limbah padat lumpur PDAM Intan Banjar. Info Teknik 12(1):21-30.
Widyastuti, C.R., D. Hartanto. 2015. Katalis heterogen dari abu vulkanik untuk pembuatan biodiesel dari minyak mikroalga Chlorella Sp. Jurnal Sain Teknologi 13(1):1-8.
Yamazaki, R.,S. Iwamoto, H. Nabetani, K. Osakada, O. Miyawaki, Y. Sagara. 2007. Noncatalytic alcoholysis of oils for biodiesel fuel production by a semi-batch process. Japan Journal of Food Engineering 8(1):11-19.
Yan, S., C. DiMaggio, S. Mohan, M. Kim, S.O. Salley, K.S. Ng. 2010. Advancements in heterogeneous catalysis for biodiesel synthesis. Topics Catal 53:721-736.
Yanti, P.H., A. Awaluddin, P. Sartika. 2011. Pembuatan biodiesel menggunakan kalsium asetat yang dikalsinasi. Jurnal Bioteknologi II(2):113-120.
Yono, D., T. Usman, N. Wahyuni. 2015. Sintesis katalis
bifungsional heterogen dari tawas dan abu tandan kosong kelapa sawit (TKKS) untuk pembuatan biodiesel. JKK 4(4):1-6.
Yujaroen, D., M. Goto, M. Sasaki, A. Shotipruk. 2009.
Esterification of palm fatty acid distillate (pfad) in supercritical methanol: effect of hydrolysis on reaction reactivity. Fuel 88:2011-2016.
Zuhra, H. Husin, F. Hasfita, W. Rinaldi. 2015. Preparasi katalis abu kulit kerang untuk transesterifikasi minyak nyamplung menjadi biodiesel. Agritech 35(1):69-77.
Arata, K. 1996. Preparation of superacids by metal oxides for reactions of butanes and pentanes. Appl Catal A-Gen 146:3-32.
Armalita, R.D., S. Bahri, Yusnimar. 2015. Pembuatan biodiesel dari minyak biji bintaro dengan reaksi transesterifikasi dan katalis lempung. Jom FTEKNIK 2(2):1-6.
Awaluddin, A., Saryono, S. Nelvia, Wahyuni. 2009. Faktor-faktor yang mempengaruhi produksi biodiesel dari minyak sawit mentah menggunakan katalis padat kalsium karbonat yang dipijarkan. Jurnal Natur Indonesia 11(2):129-134.
Benson, T.J., R. Hernandez, W.T. French, E.G. Alley, W.E. Holmes. 2009. Elucidation of the catalytic cracking pathway for unsaturated mono-, di-, and triacylglycerides on solid acid catalysts. JMol Catal
A:Chem 303:117-123.
Bunyakiat, K., S. Makmee, R. Sawangkeaw, S. Ngamprasertsith. 2006. Continuous production of biodiesel via transesterification from vegetable oils in supercritical methanol. Energy Fuels 20:812-817.
Cai, Y., J.A. Nieweg, W.A. Turner, C.K. Wilkinson. 2011. Systems and processes for biodiesel production. Patent No. US 2011/0054200 A1.
Cao, W., H. Han, J. Zhang. 2005. Preparation of biodiesel from soybean oil using supercritical methanol and cosolvent. Fuel 84:347-351.
Corma, A. 1997. Solid acid catalysts. Curr Opin Solid St
M 2:63-75.
Danuthai, T., S. Jongpatiwut, T. Rirksomboon, S. Osuwan, D.E. Resasco. 2009. Conversion of methylesters to hydrocarbons over an H-ZSM5 zeolite catalyst. Appl Catal A-Gen 361:99-105.
Darnoko, D., M. Cheryan. 2000. Kinetics of palm oil transesterification in a batch reactor. Journal Am Oil Chem Soc 77:1263-1267.
Demirbas, A. 2002. Biodiesel from vegetable oils via transesterification in supercritical. Energy Convers Manage 43:2349-2356.
Demirbas, A. 2008. Studies on cottonseed oil biodiesel prepared in non-catalytic SCF conditions. Bioresour Technol 99:1125-1130.
Demirbas, A. 2009a. Political, economic and environmental impacts of biofuels: A review. Appl Energy 86:S108-S117.
Demirbas, A. 2009b. Progress and recent trends in biodiesel fuels. Energy Convers Manage 50:14-34.
Devitria, R, Nurhayati, Anita S. 2013. Sintesis biodiesel dengan katalis heterogen lempung cengar yang diaktivasi dengan NaOH: pengaruh waktu reaksi dan rasio molar minyak:metanol. Jurnal Ind Che Acta 3(2):39-44.
Diasakou, M., A. Louloudi, N. Papayannakos. 1998. Kinetics of the non-catalytic transesterification of soybean oil. Fuel 77:1297-1302.
Dwitama, M.I., M. Nazib, O.C. Sitepu, D.A.P. Suandi, I.N. Simpen. 2016. Konversi minyak biji malapari (Pongamia Pinnata L.) menjadi biodiesel melalui pemanfaatan katalis heterogen abu sekam padi
termodifikasi Li. Jurnal Kimia 10(2):236-244.
Feng, Y., B. He, Y. Cao, J. Li, M. Liu, F. Yan. 2010. Biodiesel production using cation-exchange resin as heterogeneous catalyst. Bioresour Technol 101:1518- 1521.
Firdaus, L.H., A.R. Wicaksono, Widayat. 2013. Pembuatan katalis h-zeolit dengan impregnasi KI/ KIO3 dan uji kinerja katalis untuk produksi biodiesel. Jurnal Teknologi Kimia dan Industri 2(2):148-154.
Forster, P., V. Ramaswamy, P. Artaxo, T. Berntsen, R. Betts. 2007. Climate change 2007-the physical science basis: contribution of working group I to the fourth assessment report of the intergovernmental panel on climate change. Cambridge University
Press, New York (US):388-405.
Freedman, B., R.O. Butterfield, E.H. Pryde. 1986. Transesterification kinetics of soybean oil. Jurnal Am Oil Chem Soc 63:1375-1380.
Fukuda, H., A. Kondo, H. Noda. 2001. Biodiesel fuel production by transesterification of oils. Jurnal Biosci Bioeng 92:405-416.
Furuta, S., H. Matsuhashi, K. Arata. 2004. Biodiesel fuel production with solid superacid catalysis in fixed bed reactor under atmospheric pressure. Catal Commun 5:721-723.
Garcia, C.M., S. Teixeira, L.L. Marciniuk, U. Schuchardt. 2008. Transesterification of soybean oil catalyzed by sulfated zirconia. Bioresour Technol 99:6608-6613.
Georgogianni, K.G., M.G. Kontominas, E. Tegou, D. Avlonitis, V. Gergis. 2007. Biodiesel production: reaction and process parameters of alkali-catalyzed transesterification of waste frying oils. Energy Fuels 21:3023-3027.
Han, H., W. Cao, J. Zhang. 2005. Preparation of biodiesel from soybean oil using supercritical methanol and CO2 as co-solvent. Proces Biochem 40:3148-3151.
Han, M., W. Yi, Q. Wu, Y. Liu, Y. Hong, D. Wang. 2009. Preparation of biodiesel from waste oils catalyzed by a Brønsted acidic ionic liquid. Bioresour Technol 100,2308-2310.
Hawash, S., N. Kamal, F. Zaher, O. Kenawi, G.E.l. Diwani. 2009. Biodiesel fuel from Jatropha oil via noncatalytic supercritical methanol transesterification.Fuel 88:579-582.
He, H., T. Wang, S. Zhu . 2007. Continuous production of biodiesel fuel from vegetable oil using supercritical methanol process. Fuel 86:442-447.
Husin, H., Mahidin, Marwan. 2011. Studi penggunaan katalis abu sabut kelapa, abu tandan sawit dan K2CO3 untuk konversi minyak jarak menjadi biodiesel. Reaktor 13(4):254-261.
Islam, A., Taufiq- Y.H. Yap, C.M. Chu, E.S. Chan, P. Ravindra. 2012. Synthesis and characterization of millimetric gamma alumina spherical particles by oil drop granulation method. Jurnal Porous Mater 19:807-817.
Jain, S., S.M. Sharma. 2010. Biodiesel production from Jatropha curcas oil. Renew Sustain Energy Rev.14:3140-3147.
Joelianingsih, H. Maeda, S. Hagiwara, H. Nabetani, Y. Sagara, H.S. Tatang, A.H. Tambunan, A . Kamarudin. 2008. Biodiesel fuels from palm oil via the noncatalytic transesterification in a bubble column reactor at atmospheric pressure: a kinetic study. Renew
Energy 33(7):1629-1636.
Juliana, I., I.A.G. Widihati, O. Ratnayani. 2016. Karakterisasi katalis batu padas ledgestone teraktivasi asam dan aplikasinya pada pembuatan biodiesel dari minyak jelantah. Jurnal Kimia 10(1):32-42.
Kartika, D., S. Widyaningsih. 2012. Konsentrasi katalis dan suhu optimum pada reaksi esterifikasi menggunakan katalis zeolit alam aktif (zah) dalam pembuatan biodiesel dari minyak jelantah. Jurnal
Natur Indonesia 14(3):219-226.
Kawashima, A., K. Matsubara, K. Honda. 2009. Acceleration of catalytic activity o calcium oxide or biodiesel production. Bioresour Technol 100:696-700.
Kiss, A.K., F. Omota, A.C. Dimian, G. Rothenberg. 2006. Heterogeneous acid catalysts for biodiesel production: current status and future challenges. Top Catal 40:141-150.
Kiss, F.E., M. Jovanovic, G.C. Boškovic´. 2010. Economic and ecological aspects of biodiesel production over homogeneous and heterogeneous catalysts. Fuel Process Technol 91:1316-1320.
Kitakawa, N.S., H. Honda, H. Kuribayashi, T. Toda, T. Fukumura, T. Yonemoto. 2007. Biodiesel production using anionic ion-exchange resin as heterogeneous catalyst. Bioresour Technol 98:416-421.
Knothe, G., J.V. Gerpen, J. Krahl. 2005. The biodiesel handbook. Illinois (US): AOCS Press. hlm 34, 35, 164, 269, 270-274.
Kouzu, M., T. Kasuno, M. Tajika, Y. Sugimoto, S. Yamanaka, J. Hidaka. 2008. Calcium oxide as a solid base catalyst for transesterification of soybean oil and its application to biodiesel production. Fuel 87:2798-2806.
Kouzu, M., S.Y. Yamanaka, J.S. Hidaka, M. Tsunomori. 2009. Heterogeneous catalysis of calcium oxide used for transesterification of soybean oil with refluxing methanol. Applied Catal A: General 355:94-99.
Kumar, A., R. Valoyi, A. Ochieng, M. Onayango. 2002. Acid-Base transesterification of oil with high free fatty acid content. J Biosci Bioeng 67:77-82.
Kusdiana, D., S. Saka. 2001. Kinetics of transesterification in rapeseed oil to biodiesel fuel as treated in supercritical methanol. Fuel 80:693-698.
Kusdiana, D., S. Saka. 2004. Effects of water on biodiesel fuel production by supercritical methanol treatment. Bioresour Technol 91:289-295.
Lam, M.K., K.T. Lee, A.R. Mohamed. 2009. Sulfated tin oxide as solid superacid catalyst for transesterification of waste cooking oil: an optimization study. Appl Catal B 93:134-139.
Lam, M.K., K.T. Lee, A.R. Mohamed. 2010. Homogeneous, heterogeneous and enzymatic catalysis for transesterification of high free fatty acid oil (waste cooking oil) to biodiesel: A review. Biotechnol Adv 28:500-518.
Lee, D.W., Y.M. Park, K.Y. Lee. 2009. Heterogeneous base catalysts for transesterification in biodiesel synthesis. Catal Surv Asia 13:63-67.
Lesbani, A., K.M. Risma, R. Mohadi. 2013. Produksi biodiesel melalui reaksi transesterifikasi minyak jelantah dengan katalis cangkang kerang darah (Anadara granosa) hasil dekomposisi. Indonesian
E-Journal of Applied Chemistry 1(2):1-7.
Leung, D.Y.C., Y. Guo. 2006. Transesterification of neat and used frying oil: optimization for biodiesel production. Fuel Process Technol 87:883-890.
Li, Y., X.D. Zang, L. Sun, M. Xu, W.G. Zhou, X.H. Liang. 2010. Solid superacid catalyzed fatty acid methyl esters production from acid oil. Appl Energ 87:2369-2373.
Lin, V.S., Y. Cai, C. Kern, J.I. Dulebohn, J.A. Nieweg. 2009. Solid catalyst system for biodiesel production. Patent No. US 2009/0112007 A1.
Liu, X., H. He, Y. Wang, S. Zhu, X. Piao. 2008. Transesterification of soybean oil to biodiesel using CaO as solid base catalyst. Fuel 87:216-221.
Lou, W.Y., M.H. Zong, Z.Q. Duan. 2008. Efficient production of biodiesel from high free fatty acid-containing waste oils using various carbohydrate derived solid acid catalysts. Bioresour Technol 99:8752-8758.
Lo’pez, D.E., Jr. J.G. Goodwin, D.A. Bruce, E. Lotero. 2005. Transesterification of triacetin with methanol on solid acid and base catalysts. Appl Catal A-Gen 295:97-105.
Lotero, E., Y. Liu, D.E. Lopez, K. Suwannakarn, D.A. Bruce, Jr. J.G. Goodwin. 2005. Synthesis of biodiesel via acid catalysis. Ind Eng Chem Res 44:5353-5363. Ma, F., M.A. Hanna. 1999. Biodiesel production: a review. Bioresour Technol 70:1-15.
Madras, G., C. Kolluru, R. Kumar. 2004. Synthesis of biodiesel in supercritical fluids. Fuel 83:2029-2033.
Maeda, Y., L.T. Thanh, K. Imamura, K. Izutani, K. Okitsu, L.V. Boi, P.N. Lan, N.C. Tuan, Y.E. Yoo, N. Takenaka. 2010. New technology for the production of biodiesel fuel. Green Chem 13:1124-1128.
Marchetti, J.M., 2013. Influence of economical variables on a supercritical biodiesel production process. Energy Convers Manage 75:658-663.
Mardina, P., A. Prayudi, M. Chumaidi. 2013. Pengaruh abu pelepah pisang sebagai katalisator basa padat terhadap angka asam produk biodiesel. Konversi 2(1):14-20.
McNeff, C.V., L.C. McNeff, B. Yan, D.T. Nowlan, M. Rasmussen. 2008. A continuous catalytic system for biodiesel production. Applied Catal A: Gen 343:39-48.
Meher, L.C., D.V. Sagar, S.N. Naik. 2006. Technical aspects of biodiesel production by tranesterification—a review. Renew Sustain Energy Rev 10:248-268.
Padil, S. Wahyuningsih, A. Awaluddin. 2010. Pembuatan biodiesel dari minyak kelapa melalui reaksi metanolisis menggunakan katalis CaCO3 yang dipijarkan. Jurnal Natur Indonesia 13(1): 27-32.
Park, Y.M., D.W. Lee, D.K. Kim, J.S. Lee, K.Y. Lee. 2008. The heterogeneous catalyst system for the continuous conversion of free fatty acids in used vegetable oils for the production of biodiesel. Catal Today 131:238-243.
Park, Y.M., J.Y. Lee, S.H. Chung, I.S. S.Y. Park, D.K. Lee, Kim. 2010. Esterification of used vegetable oils using the heterogeneous WO3/ZrO2 catalyst for production of biodiesel. Bioresour Technol 101:S59-S61.
Permatasari, A., W. Mayangsari, I. Gunardi. 2013. Pembuatan biodiesel dari minyak nyamplung (Calophyllum Inophyllum L) dengan reaksi transesterifikasi menggunakan katalis K2O/HZa berbasis zeolit alam. Jurnal Teknik Pomits 2(2):F290-F295.
Petchmala, A., N. Laosiripojana. 2010. Transesterification of palm oil and esterication of palm fatty acid in near and super-critical methanol With SO4–ZrO2 catalysts. Fuel 89:2387-2392.
Pinnarat, T., P.E. Savage. 2008. Assessment of noncatalytic biodiesel synthesis using supercritical reaction conditions. Ind Eng Chem Res 47:6801-6808.
Puspitaningati, S.R., R. Permatasari, I. Gunardi. 2013. Pembuatan biodiesel dari minyak kelapa sawit dengan menggunakan katalis berpromotor ganda berpenyangga γ-alumina (CaO/KI/γ-Al2O3) dalam reaktor fluidized bed. Jurnal Teknik Pomits
2(2):F193-F197.
Rahmawati, D.A., D. Intaningrum, Istadi. 2013. Pembuatan dan karakterisasi heterogen SO4 2-- ZnO dan SO4 2-/ZnO metode kopresipitasi dan impregnasi untuk produksi biodiesel dari minyak kedelai. Jurnal Teknologi Kimia dan Industri 2(4):243-252.
Rathore, V., G. Madras. 2007. Synthesis of biodiesel from edible and non-edible oils in supercritical alcohols and enzymatic synthesis in supercritical carbon dioxide. Fuel 86:2650-2659.
Ritonga, M.Y., A. Putra. 2015. Pembuatan biodiesel dari RBDPO dengan katalis cangkang kepah. Jurnal Teknik Kimia USU, Article in Press hlm. 1-7.
Saifuddin, N., A. Samiuddin, P. Kumaran. 2015. A Review on Processing Technology for Biodiesel Production. Trends in Applied Sciences Research 10:1-37.
Saputra, L., N. Rakhmah, H.T. Pradita, Sunardi. 2012. Produksi biodiesel dari minyak jelantah dengan cangkang bekocot (Achatina fulica) sebagai katalis heterogen. Prestasi 1(2):118-125.
Schuchardt, U., R. Sercheli, R. Vargas. 1998. Transesterification of vegetable oils: a review. Journal Braz Chem Soc 9:199-210.
Shu, Q., Z. Nawaz, J. Gao, Y. Liao, Q. Zhang, D. Wang. 2010. Synthesis of biodiesel from a model waste oil feedstock using a carbon-based solid acid catalyst. Reaction and separation. Bioresour Technol 101:5374-5384.
Silitonga, A.S., A.E. Atabani, T.M.I. Mahlia, H.H. Masjuki, I.A. Badruddin, S. Mekhilef. 2011. A review on prospect of Jatropha curcas for biodiesel in Indonesia. Renew Sust Energ Rev 15:3733-3756.
Silva, C., T.A. Weschenfelder, S. Rovani, F.C. Corazza, M.L. Corazza, C. Dariva, J.V. Oliveira . 2007.
Continuous production of fatty acid ethyl esters from soybean oil in compressed ethanol. Ind Eng Chem Res 46:5304-5309.
Sinta, T., D. Tarigan, C. Saleh. 2016. Optimasi suhu reaksi transesterifikasi pada minyak jerami padi (Oryza sativa L.) menjadi biodiesel dengan menggunakan katalis CaO dari kulit telur ayam. Jurnal Kimia Mulawarman 14(1):19-23.
Sitinjak, J.F.M., Z. Helwani, E. Saputra. 2016. Penggunaan Na2O/fly ash sebagai katalis pada tahap transesterifikasi minyak sawit off-grade menjadi biodiesel. Jom FTEKNIK 3(1):1-8.
Sitorus, S., A. Murtiasih. 2015. Pemanfaatan abu sabut kelapa sebagai katalis basa dalam pembuatan biodiesel dari minyak biji jarak pagar (Jatropha curcas. L). Jurnal Riset Teknologi Indonesia 9(1):50-55.
Sivasamy, A., K.Y. Cheah, P. Fornasiero, F. Kemausuor, S. Zinoviev, S. Miertus. 2009. Catalytic applications in the production of biodiesel from vegetable oils. Chem Sus Chem 2:278-300.
Song, E.S., J.W. Lim, H.S. Lee, Y.W. Lee. 2008. Transesterification of RBD palm oil using supercritical methanol. Jurnal Supercrit Fluids 44:356-363.
Song, C., Y. Qi, T. Deng, X. Hou, Z. Qin. 2010. Kinetic model for the esterification of oleic acid catalyzed by zinc acetate in subcritical methanol. Renew Energy 35: 625-628.
Sriatun, Taslimah, L. Suyati. 2015. Pemanfaatan katalis silika alumina dari bagasse pada pembuatan biodiesel dari minyak goreng sisa pakai. Jurnal Teknologi Industri Pertanian 25(1):35-42.
Supriadi, A., K. Oktaviani, A.W. Kencono, B.E. Prasetyo, T.N. Kurniasih, F.K. Sunaryo, C.B. Kurniadi, Y. Alwendra, R. Aprillia, I. Setiadi, Q. Rabbani, D. Anggreani. 2016. Data inventory emisi GRK sektor energi. Jakarta Pusat (ID): Pusdatin ESDM. ISBN:978-
602-0836-22-5.
Susila, I.W. 2009. Pengembangan proses produksi biodiesel biji karet metode non-katalis superheated methanol pada tekanan atmosfir. Jurnal Teknik Mesin 11(2):115-124.
Syamsuddin, Y., H. Husin. 2010. Pembuatan katalis padat
ZrO2/Al2O3 untuk produksi biodiesel dari minyak jarak.
Jurnal Rekayasa Kimia dan Lingkungan 7(3):112-117.
Tanabe, K., T. Yamaguchi. 1994. Acid-base bifunctional catalysis by ZrO2 and its mixed oxides. Catal Today 20:185-197.
Taufiq-Yap, Y.H., H.V. Lee, M.Z. Hussein, R. Yunus. 2011. Calcium-based mixed oxide catalysts for methanolysis of Jatropha curcas oil to biodiesel. Biomass Bioenergy 35:827-834.
Tesser, R., L. Casale, D. Verde, M.D. Serio, E. Santacesaria. 2010. Kinetics and modeling of fatty acids esterification on acid exchange resins. Chemical Engineering Journal 157:539-550.
Thanh, L.T., K. Okitsu, Y. Sadanaga, N. Takenaka, Y. Maeda, H. Bandow. 2010. Ultrasound-assisted production of biodiesel fuel from vegetable oils in a small scale circulation process. Bioresour Technol
101:639-645.
Thanh, L.T., K. Okitsu, L.V. Boi, Y. Maeda. 2012. Catalytic technologies for biodiesel fuel production and utilization of glycerol: a review. Catalysts 2:191-222.
Utami, I., R. Solikhah, I. Istadi. 2012. Sintesa katalis super asam SO4 2-/ ZnO untuk produksi biodiesel dari minyak kelapa sawit. Jurnal Teknologi Kimia dan Industri 1(1):69-78.
Varma, M.N., G. Madras. 2007. Synthesis of biodiesel from castor oil and linseed oil in supercritical fluids. Ind Eng Chem Res 46:1-6.
Venkateswarulu, T.C., C.V. Ravi Teja, K.V. Prabhaker, D.J.
Babu, A.R. Reddy, M. Indira, A. Venkatanarayana.
2014. A review on methods of transesterification of oils and fats in biodiesel formation. Int Journal Chemtech Res 6(4):2568-2576.
Vieitez, I., C. Da. Silva, G.R. Borges, F.C. Corazza, J.V. Oliveira, M.A. Grompone, I. Jachmanian. 2008. Continuous production of soybean biodiesel in supercritical ethanol-water mixtures. Energy Fuels
22:2805-2809.
Wendi, V. Cuaca, Taslim. 2015. Pengaruh suhu reaksi dan jumlah katalis pada pembuatan biodiesel dari limbah lemak sapi dengan menggunakan katalis heterogen CaO dari kulit telur ayam. Jurnal Teknik Kimia USU, Article in Press hlm. 1-7.
Wicakso, D.R. 2011. Sintesis biodiesel dari crude palm oil dengan katalis alumina hasil recovery limbah padat lumpur PDAM Intan Banjar. Info Teknik 12(1):21-30.
Widyastuti, C.R., D. Hartanto. 2015. Katalis heterogen dari abu vulkanik untuk pembuatan biodiesel dari minyak mikroalga Chlorella Sp. Jurnal Sain Teknologi 13(1):1-8.
Yamazaki, R.,S. Iwamoto, H. Nabetani, K. Osakada, O. Miyawaki, Y. Sagara. 2007. Noncatalytic alcoholysis of oils for biodiesel fuel production by a semi-batch process. Japan Journal of Food Engineering 8(1):11-19.
Yan, S., C. DiMaggio, S. Mohan, M. Kim, S.O. Salley, K.S. Ng. 2010. Advancements in heterogeneous catalysis for biodiesel synthesis. Topics Catal 53:721-736.
Yanti, P.H., A. Awaluddin, P. Sartika. 2011. Pembuatan biodiesel menggunakan kalsium asetat yang dikalsinasi. Jurnal Bioteknologi II(2):113-120.
Yono, D., T. Usman, N. Wahyuni. 2015. Sintesis katalis
bifungsional heterogen dari tawas dan abu tandan kosong kelapa sawit (TKKS) untuk pembuatan biodiesel. JKK 4(4):1-6.
Yujaroen, D., M. Goto, M. Sasaki, A. Shotipruk. 2009.
Esterification of palm fatty acid distillate (pfad) in supercritical methanol: effect of hydrolysis on reaction reactivity. Fuel 88:2011-2016.
Zuhra, H. Husin, F. Hasfita, W. Rinaldi. 2015. Preparasi katalis abu kulit kerang untuk transesterifikasi minyak nyamplung menjadi biodiesel. Agritech 35(1):69-77.
Authors
WahyudinW., TambunanA. H., PurwantiN., JoelianingsihJ., & NabetaniH. (2018). Tinjauan Perkembangan Proses Katalitik Heterogen dan Non-Katalitik untuk Produksi Biodiesel. Jurnal Keteknikan Pertanian, 6(2), 123-130. https://doi.org/10.19028/jtep.06.2.123-130
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