Quality Improvement of Kesambi-Seed Oil using Free Fatty Acids and Hydrogen Cyanide Adsorption

  • Dwi Ardiana Setyawardhani Chemical Engineering Department, Universitas Sebelas Maret Jl. Ir. Sutami 36 A Surakarta 57126, Indonesia
  • Diah Sri Umpati Chemical Engineering Department, Universitas Sebelas Maret Jl. Ir. Sutami 36 A Surakarta 57126, Indonesia
  • Yudi Eka Fahroni Chemical Engineering Department, Universitas Sebelas Maret Jl. Ir. Sutami 36 A Surakarta 57126, Indonesia
Keywords: Adsorption, Activated Carbon, Degumming, Free Fatty Acid, Kesambi-Seed Oil

Abstract

Kesambi-seed (Schleichera oleosa) is an Indonesian potential feedstock to produce vegetable oil for energy resources and oleochemicals. Crude Kesambi-seed oil (KSO) contains 8.43% free fatty acids (FFA) and 128 ppm hydrogen cyanide (HCN), which exceeds the Indonesian National Standard (SNI) for refined oil. Purification process is needed for crude KSO to be high quality vegetable oil. This study aimed to improve the quality of KSO by reducing the FFA and HCN contents using adsorption. The adsorption equilibrium is also determined to obtain the equilibrium constants. The purification process was developed in 2 steps, i.e., degumming and adsorption. Degumming was developed using 2.5% v/v H3PO4 to separate phospholipids/phosphatides in the crude oil, while adsorption using activated carbon was introduced to reduce the FFA and HCN contents.  Kesambi-seed oil purification using activated carbon adsorption could be used as one-step refining for bleaching and reducing FFA and HCN. More adsorbent is needed to reach the FFA standard for the shorter adsorption time. Adsorption using 10% activated carbon for 24 hours reduced hydrogen cyanide up to 36 mg/kg oil, lightened the oil color, and achieved the highest yield (74.62%). Meanwhile, the activated carbon concentration of 40% w/w  for 96 hours obtained 0.16% FFA. All three parameters have fulfilled the Indonesian National Standard for refined vegetable oil. Furthermore, the Freundlich model best fits equilibrium adsorption of FFA in the KSO.

References

AOAC, 2000. AOAC 17th ed Official Method 915. 03 Hydrocyanic acid in Beans/IS 11535:1986/ISO 2164- 1975 Method of test for determination of glycosidic hydrocyanic acid in pulses.

Ayawei, N., Ebelegi, A. N., and Wankasi, D., 2017. “Modelling and interpretation of adsorption isotherms.” Journal of Chemistry 2017, 1–12.

Baptiste, B. M. J., Daniele, B. K., Charlène, E. M., Canuala, T. T. L., Antoine, E., & Richard, K., 2020. “Adsorption mechanisms of pigments and free fatty acids in the discoloration of shea butter and palm oil by an acid-activated Cameroonian smectite.” Scientific African 9, e00498.

Benjelloun, M., Miyah, Y., Akdemir Evrendilek, G., Zerrouq, F., and Lairini, S., 2021. “Recent advances in adsorption kinetic models: their application to dye types.” Arabian J. Chem. 14(4), 1–24.

Chumsantea, S., Aryusuk, K., Lilitchan, S., Jeyashoke, N., and Krisnangkura, K., 2012. “Reducing oil losses in alkali refining.” J. Am. Oil Chem. Soc. 89(10), 1913–1919.

Clowutimon, W., Kitchaiya, P., & Assawasaengrat, P., 2011. “Adsorption of free fatty acid from crude palm oil on magnesium silicate derived from rice husk.” Engineering Journal 15(3), 16–25.

Gharby, S., 2022. “Refining vegetable oils: chemical and physical refining.” Scientific World Journal 2022, 6627013.

Ifa, L., Wiyani, L., Nurdjannah, N., Ghalib, A. M. T., Ramadhaniar, S., and Kusuma, H. S., 2021. “Analysis of bentonite performance on the quality of refined crude palm oil’s color, free fatty acid and carotene: the effect of bentonite concentration and contact time.“ Heliyon 7(6), e07230

Ma, Y., Shi, L., Liu, Y., & Lu, Q., 2017. “Effects of neutralization, decoloration, and deodorization on polycyclic aromatic hydrocarbons during laboratory-scale oil refining process.” Journal of Chemistry 2017, 7824761

Mhadmhan, S., Yoosuk, B., Chareonteraboon, B., Janetaisong, P., Pitakjakpipop, P., Henpraserttae, S., and Udomsap, P., 2023. “Elimination of free fatty acid from palm oil by adsorption process using a strong base anion exchange resin.” Sep. Purif. Technol. 310, 123211.

Oshima, H., Ueno, E., Saito, I., and Matsumoto, H., 2003. “Quantitative determination of cyanide in foods spectrophotometry using picric acid test strips.” Japanese Journal of Food Chemistry 1(2), 96–100.

Putranti, M. L. T. A., Wirawan, S. K., & Bendiyasa, I. M., 2018. “Adsorption of free fatty acid (FFA) in low-grade cooking oil used activated natural zeolite as adsorbent.” IOP Conf. Ser.: Mater. Sci. Eng. 299, 012085

Putri, F. D., Pratama, A. S., Sauzsa, F. El, and Setyawardhani, D. A., 2022. “Pemurnian minyak biji Kesambi (Schleichera oleosa) sebagai bahan baku pembuatan minyak goreng.” Equilibrium Journal of Chemical Engineering 5(2), 75–81

Rahayu, S., Supriyatin, and Bintari, A., 2018. “Activated carbon-based bio-adsorbent for reducing free fatty acid number of cooking oil.” AIP Conf. Proc. 2019, 050004

Rengga, W. D. P., Seubsai, A., Roddecha, S., Yudistira, A., and Wiharto, A. D., 2021. “Isotherm adsorption of free fatty acid in waste cooking oil used activated carbon of banana peel as bio-adsorbent.” J. Phys.: Conf. Ser. 1918, 032008

Setyawardhani, D. A., Sulistyo, H., Sediawan, W. B., and Fahrurrozi, M., 2015. “Separating poly-unsaturated fatty acids from vegetable oil using urea complexation: The crystallisation temperature effects.” Journal of Engineering Science and Technology, 10, 41–49.

Setyawardhani, D. A., Sulistyo, H., Sediawan, W. B., and Fahrurrozi, M., 2018. “Adsorption of saturated fatty acid in urea complexation: Kinetics and equilibrium studies.” AIP Conf. Proc. 1931, 030013

Setyawardhani, D. A., Sulistyo, H., Sediawan, W. B., and Fahrurrozi, M., 2019. “Kinetic and equilibrium studies of stearic acid adsorption in urea complexation.” AIP Conf. Proc. 2097, 030011

Simatupang, D. F., Tarigan, J., and Mansyur., 2020. “The effect of active carbon adsorbents from some wastes in reducing free fatty acids and acid number to improve VCO quality.” IOP Conf. Ser.: Mater. Sci. Eng. 885, 012011

Standar Nasional Indonesia, 2013. SNI 3741:2013. Syarat Mutu Minyak Goreng.

Tamara, Y. M., Hidayat, W. N., Azizah, A. N., and Setyawardhani, D. A., 2020. “Kesambi oil extraction using the solvent extraction method.” AIP Conf. Proc. 2217, 030031

Wirawan, S. K., Timotius, D., Nugraha, I. M., Restana, A., Anggara, A. L., and Hidayatullah, S., 2022. “Kinetics and adsorption equilibrium study of free fatty acid (FFA) from crude palm oil (cpo) on anionic resin.” ASEAN Journal of Chemical Engineering, 22(1), 33–41.

Published
2024-04-30
How to Cite
Setyawardhani, D. A., Umpati, D. S., & Fahroni, Y. E. (2024). Quality Improvement of Kesambi-Seed Oil using Free Fatty Acids and Hydrogen Cyanide Adsorption. ASEAN Journal of Chemical Engineering, 24(1), 53-64. https://doi.org/10.22146/ajche.12057
Section
Articles