NaOH-MODIFIED ACTIVATED CARBON FROM CORNCOBS AS A HETEROGENEOUS CATALYST: SYNTHESIS AND APPLICATION IN ULTRASOUND-ENHANCED TRANSESTERIFICATION OF USED COOKING OIL
DOI:
https://doi.org/10.21580/wjc.v8i2.28915Keywords:
biodiesel, Corncobs, activated carbon, Catalyst, Used Cooking OilAbstract
Biodiesel is an alternative fuel composed of fatty acid methyl esters that can be synthesized from renewable sources and offers lower combustion emissions compared to fossil fuels. In this study, biodiesel was produced via a transesterification reaction using a basic heterogeneous catalyst derived from corncob carbon, which was activated and surface-modified with NaOH to create active catalytic sites. XRD and FTIR analyses confirmed the presence of Na₂CO₃ and Na₂O, while SEM-EDX revealed a porous surface morphology with uniformly distributed sodium. Used cooking oil (UCO) served as the triglyceride source after undergoing degumming, neutralization, and adsorption processes to reduce free fatty acid (FFA) content. The transesterification reaction was conducted in an ultrasonic water bath using the reflux method at 60°C with an oil-to-methanol molar ratio of 1:12. The optimum reaction conditions were achieved using 0.5 wt% catalyst and a reaction time of 120 minutes, yielding 73.15% biodiesel. The quality of the biodiesel produced under optimum conditions was evaluated based on density, viscosity, acid value, and calorific value, which were 857 kg/m³, 3.8743 cSt, 0.2504 mg KOH/g, and 11,168 cal/g, respectively. These values comply with the quality requirements specified in SNI 04-7182-2015. GC-MS analysis confirmed that the major components of the biodiesel were methyl oleate and methyl palmitate. The utilization of corncob waste as a sustainable catalyst support, combined with alkali modification and ultrasonic enhancement, offers improved catalytic efficiency under mild operating conditions. This eco-friendly catalyst demonstrates strong potential for green catalytic processes in renewable energy development.
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Al-Swaidan, H. M., & Ahmad, A. (2011). Synthesis and Characterization of Activated Carbon from Saudi Arabian Dates Tree’s Fronds Wastes. International Conference on Chemical, Biological and Environmental Engineering (IPCBEE), 20. https://www.researchgate.net/publication/284662306_Synthesis_and_characterization_of_activated_carbon_from_Saudi_Arabian_dates_tree’s_fronds_wastes
Ansori, A., & Mahfud, M. (2021). Ultrasound Assisted Interesterification for Biodiesel Production from Palm Oil and Methyl Acetate: Optimization Using RSM. Journal of Physics: Conference Series, 1747(1). https://doi.org/10.1088/1742-6596/1747/1/012044
Chana, K., Chen, B. H., & Na-Ranong, D. (2025). Biodiesel Produced from Transesterification of Palm Oil Using NaOH-treated Activated Carbon and Pyrolytic Char of Used Tires as Catalysts. Process Safety and Environmental Protection, 195, 1–13. https://doi.org/10.1016/j.psep.2025.01.004
Elgharbawy, A. S., Osman, A. I., El Demerdash, A. G. M., Sadik, W. A., Kasaby, M. A., & Ali, S. E. (2024). Enhancing Biodiesel Production Efficiency with Industrial Waste-Derived Catalysts: Techno-Economic Analysis of Microwave and Ultrasonic Transesterification Methods. Energy Conversion and Management, 321, 1–12. https://doi.org/10.1016/j.enconman.2024.118945
Gharby, S. (2022). Refining Vegetable Oils: Chemical and Physical Refining. The Scientific World Journal, 2022(1), 1. https://doi.org/10.1155/2022/6627013
Helwani, Z., Negara, W. S., Zahrina, I., Amraini, S. Z., Idroes, G. M., Muslem, & Idroes, R. (2021). The Effect of KOH Concentration and Calcination Temperature on The Cement Clinker Catalyst Activity in The Transesterification of Off-Grade Palm Oil into Biodiesel. IOP Conference Series: Materials Science and Engineering, 1087(1), 012061. https://doi.org/10.1088/1757-899X/1087/1/012061
Hendi, E. S., Rusdi, R., Alam, B. N., & Nurbaeti, S. (2021). Purification of Used Cooking Oil by Alkali Neutralization and Bleaching of Bayah Natural Zeolite. Jurnal Bahan Alam Terbarukan, 10(1), 36–42. https://doi.org/10.15294/JBAT.V10I1.28636
Hisbullah, H. (2022). Characterization of Physically and Chemically Activated Carbon Derived from Palm Kernel. International Journal of GEOMATE, 23(97), 203–210. https://doi.org/10.21660/2022.97.7554
Hoo, D. Y., Low, Z. L., Low, D. Y. S., Tang, S. Y., Manickam, S., Tan, K. W., & Ban, Z. H. (2022). Ultrasonic Cavitation: An Effective Cleaner and Greener Intensification Technology in the Extraction and Surface Modification of Nanocellulose. Ultrasonics Sonochemistry, 90, 1–21. https://doi.org/10.1016/j.ultsonch.2022.106176
Kongto, P., Palamanit, A., Ninduangdee, P., Singh, Y., Chanakaewsomboon, I., Hayat, A., & Wae-hayee, M. (2022). Intensive Exploration of the Fuel Characteristics of Biomass and Biochar from Oil Palm Trunk and Oil Palm Fronds for Supporting Increasing Demand of Solid Biofuels in Thailand. Energy Reports, 8, 5640–5652. https://doi.org/10.1016/J.EGYR.2022.04.033
Larimi, A., Harvey, A. P., Phan, A. N., Beshtar, M., Wilson, K., & Lee, A. F. (2024). Aspects of Reaction Engineering for Biodiesel Production. In Catalysts (Vol. 14, Issue 10). Multidisciplinary Digital Publishing Institute (MDPI). https://doi.org/10.3390/catal14100701
Mandari, V., & Devarai, S. K. (2022). Biodiesel Production Using Homogeneous, Heterogeneous, and Enzyme Catalysts via Transesterification and Esterification Reactions: a Critical Review. Bioenergy Research, 15(2), 935–961. https://doi.org/10.1007/s12155-021-10333-w
Monika, Banga, S., & Pathak, V. V. (2023). Biodiesel Production from Waste Cooking Oil: A Comprehensive Review on the Application of Heterogenous Catalysts. Energy Nexus, 10, 1–20. https://doi.org/10.1016/j.nexus.2023.100209
Naseef, H. H., & Tulaimat, R. H. (2025). Transesterification and Esterification for Biodiesel Production: A Comprehensive Review of Catalysts and Palm Oil Feedstocks. Energy Conversion and Management: X, 26, 100931. https://doi.org/10.1016/J.ECMX.2025.100931
Nguyen, H. C., Nguyen, M. L., Su, C. H., Ong, H. C., Juan, H. Y., & Wu, S. J. (2021). Bio-derived catalysts: A Current Trend of Catalysts Used in Biodiesel Production. Catalysts, 11(7), 1–28. https://doi.org/10.3390/catal11070812
Nyepetsi, M., Oyetunji, O. A., & Mbaiwa, F. (2024). Molecular Dynamics Study of the Thermodynamic Properties of Triglyceride/methanol Mixtures in the Presence of Cosolvent. Journal of Molecular Liquids, 399, 1–15. https://doi.org/10.1016/J.MOLLIQ.2024.124431
Rahman, A., Oktaufik, M. A. M., Sasongko, T. W., Guntoro, I., Soedjati, D., Abbas, N., Rahman, A., Ulfah, F., Widiarto, A., Siswanto, Dharmawan, Trihadi, S. E. Y., Kusrestuwardani, Prihatin, A. L., Hadi, A., Indrijarso, S., Rahardjo, P., Barkah, A., Febijanto, I., & Sasongko, N. A. (2025). Current Scenario and Potential of Waste Cooking Oil as a Feedstock for Biodiesel Production in Indonesia: Life Cycle Sustainability Assessment (LCSA) Review. Case Studies in Chemical and Environmental Engineering, 11, 101067. https://doi.org/10.1016/J.CSCEE.2024.101067
Siang, A. O. L., Leman, A. M., Feriyanto, D., Abdulmalik, S. S., & Zakaria, S. (2024). Sustainable Biodiesel Production from Waste Cooking Oil and Crude Palm Oil Using a Custom Mini Pilot Plant. International Journal of Innovation in Mechanical Engineering and Advanced Materials, 6(1), 7–20. https://doi.org/10.22441/ijimeam.v6i1.23734
Suminar, D. R., Pribadi, C. Z., Fitriana, Q. R., Andrijanto, E., Permana, M. D., Eddy, D. R., & Rahayu, I. (2024). Corncob Waste Derived Carbon with Sulfonic Acid Group: An Efficient Heterogeneous Catalyst for Production of Ethyl Levulinate as Biodiesel Additives. Heliyon, 10(18), 1–10. https://doi.org/10.1016/j.heliyon.2024.e37687
Tamilselvan, P., Sassykova, L., Prabhahar, M., Bhaskar, K., Kannayiram, G., Subramanian, S., & Prakash, S. (2020). Influence of Saturated Fatty Acid Material Composition in Biodiesel on its Performance in Internal Combustion Engines. Materials Today: Proceedings, 33(1), 1181–1186. https://doi.org/10.1016/j.matpr.2020.07.626
Wang, S., Nam, H., Gebreegziabher, T. B., & Nam, H. (2020). Adsorption of acetic acid and hydrogen sulfide using NaOH impregnated activated carbon for indoor air purification. Engineering Reports, 2(1). https://doi.org/10.1002/eng2.12083
Wirawan, S. S., Solikhah, M. D., Setiapraja, H., & Sugiyono, A. (2024). Biodiesel Implementation in Indonesia: Experiences and Future Perspectives. Renewable and Sustainable Energy Reviews, 189, 113911. https://doi.org/10.1016/J.RSER.2023.113911
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