Kinetics and Adsorption Equilibrium Study of Free Fatty Acid (FFA) from Crude Palm Oil (CPO) on Anionic Resin
Abstract
Crude Palm Oil (CPO) is obtained from palm fruit extraction. Free Fatty Acid (FFA) level is one of the most important parameters to determine the CPO quality. The standard FFA level in the industry is less than 5%. In the palm oil processing industry, FFA levels in CPO have been minimized through vacuum distillation processes. However, due to the emulsified water in oil and long departure waiting time in port, FFA levels in CPO raise to above 5% resulting in lower quality and selling price. This study has developed a novel approach to mitigate this problem by using anionic resin as an adsorbent to decrease the FFA level. We investigated the kinetics and equilibrium behavior of FFA adsorption in CPO on the anionic resin. The adsorption was conducted in several resin dose (17.5%; 25%; 33.33%; 43%). The kinetic study shows that the FFA adsorption kinetics on anionic resin follows the Pseudo-second-order rate model with the value of k2 vary between 2.1034×10-4 – 1.7375×10-3 and the qe value is in the range of 103.627 - 163.880 (mg/g). The equilibrium study shows that the Freundlich isotherm model is the fittest. The Kf values are obtained between 4.16-15.02, and the n values are in the range of 1.62-2.05. The thermodynamic observation was also involved in this study. The value of and are 28.59 kJ/mol and 91.25 J/mol/K respectively. The results show that the reaction is endothermic, spontaneous, and feasible.
References
Aljeboree, A. M., Alshirifi, A. N., Alkaim, A. F., 2017. “Kinetics and equilibrium study for the adsorption of textile dyes on coconut shell activated carbon”, Arabian J. Chem. 10: S3381-S3393
Ayawei, N., Angaye, S. S., Wankasi, D., Dikio, E. D., 2015. “Synthesis, characterization, and application of mg/al layered double hydroxide for the degradation of congo red in aqueous solution”, Open J. Phys. Chem., 5(3), 56-70.
Ayawei, N., Ebelegi, A. N., Wankasi, D., 2017. “Modelling and interpretation of adsorption isotherms”, J. Chem., 2017, ID 3039817.
BPS-Statistics Indonesia, 2019. “Indonesian oil palm statistics 2018”, www.bps.go.id/
Chung, T. W., Wu, Y. L., Hsu, S. H., 2018. “Removal of free fatty acid from plant oil by the adsorption process”, IOP Conf. Ser.: Mater. Sci. Eng., 362,012019.
Cren, É. C., & Meirelles, A. J. A., 2012. “Oleic acid removal from ethanolic solutions by ion exchange”, Chem. Eng. J, 184, 125–131.
Dardel., 2015. “Ion exchange resin properties”, http://dardel.info/IX/resin_properties.html
Ghosal, P. S. & Gupta, A. K., 2017. “Determination of thermodynamic parameters from Langmuir isotherm constant-revisited”, J. Mol. Liq, 225(2017), 137–146.
Hydari, S., Sharififard, H., Nabavinia, M., Parvizi, M. R., 2012. “Comparative investigation on removal performances of commercial activated carbon, chitosan biosorbent and chitosan/activated carbon composite for cadmium”, Chem. Eng. J., 193-194, 276-282
Ilgen, O., 2014. “Adsorption of oleic acid from sunflower oil on Amberlyst A26 (OH)”, Fuel Process Technol., 11, 69–74.
Jamal, Y., & Boulanger, B. O., 2010. “Separation of oleic acid from soybean oil using mixed-bed resins”, J. Chem. Eng. Data, 55(7), 2405–2409.
Japir, A. A. W., Salimon, J., Deraw, D., Bahadi, M., Yusop, M. R., 2016. “Purification of high free fatty acid crude palm oil using molecular distillation”, Asian J. Chem., 28(11), 2549-2554.
Nugraha, I. M., 2017. “Studi kinetika adsorpsi free fatty acid (ffa) pada crude palm oil (CPO) menggunakan resin anion sebagai solusi peningkatan mutu cpo”, Bachelor Research Report. Universitas Gadjah Mada, Yogyakarta, Indonesia.
Ohimain, E. I. Izah, S. C. Fawari, A.D., 2013. “Quality assessment of crude palm oil produced by semi-mechanized processor in Bayelsa State, Nigeria”, Niger Delta University, Bayelsa State, Nigeria.
Restana, A., 2017. “Studi kesetimbangan adsorpsi free fatty acid (FFA) pada crude palm oil (CPO) menggunakan resin anion sebagai solusi peningkatan mutu CPO”, Bachelor Research Report. Universitas Gadjah Mada, Yogyakarta, Indonesia.
Vernier, K., Vieira, T., Wolf, M., Belfiore, L. A., Tambourgi, E. B., Paulino, A. T., 2018. “Polysaccharide-based hydrogels for the immobilization and controlled release of bovine serum albumin”, Int. J. Biol. Macromol., 120, 522-528
Zhang, M., 2012. “Removal of acetic acid from fuel ethanol using ion-exchange resin”, Energy Fuels, 26, 7299−7307.
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