Pre-treatment of Used-Cooking Oil as Feed Stocks of Biodiesel Production by Using Activated Carbon and Clay Minerals

DOI: https://doi.org/10.14710/ijred.3.1.33-35
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Published: 15-02-2014
Section: Original Research Article
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Many low-cost feedstock i.e. used-cooking oil (UCO) for the production of biodiesel fuel (BDF) has contained a large amount of water and high proportion of free fatty acids (FFAs). Therefore, a pre-treatment process to reduce the water content (<0.1 wt.%) and FFAs (<2.0 wt.%) were necessary in order to avoid an undesirable side reactions, such as saponification, which could lead to serious problem of product separation and low fatty acid methyl ester (FAME) yield. . In this study, a pre-treatment process of used cooking oil as a feedstock for the production of BDF by using various adsorbents such as Activated Carbon (AC) and various clay minerals, for example Smectite (S), Bentonite (B), Kaolinite (K), and Powdered Earthenware (PE) were evaluated. The oil obtained from pre-treatment was compared with oil without pre-treatment process. In this study, we reported a basic difference in material ability to the oil, depending on the adsorption condition with respect to the physico-chemical parameters, e.g. refractive index (R), density (ρ), FFAs, and water content (W). The results showed that the water content and FFAs in the oil has decreased when using AC as an adsorbent compared with clay minerals. However, the refractive index of oil has similar with the oil without pre-treatment process as well; meanwhile, the density of oil has increased after the pre-treatment process by using clay minerals.

Keywords

used cooking oil; activated carbon, clay minerals; adsorbent; physico-chemical properties

  1. Rudy Syah Putra 
    Department of Chemistry, Faculty of Mathematics and Natural Sciences , Islamic University of Indonesia, Jl. Kaliurang Km 14.5, Yogyakarta 55584, Indonesia
  2. Tatang Shabur Juliantoa 
    Department of Chemistry, Faculty of Mathematics and Natural Sciences , Islamic University of Indonesia, Jl. Kaliurang Km 14.5, Yogyakarta 55584, Indonesia
  3. Puji Hartono 
    Department of Chemistry, Faculty of Mathematics and Natural Sciences , Islamic University of Indonesia, Jl. Kaliurang Km 14.5, Yogyakarta 55584
  4. Ratih Dyah Puspitasaria 
    Department of Chemistry, Faculty of Mathematics and Natural Sciences , Islamic University of Indonesia, Jl. Kaliurang Km 14.5, Yogyakarta 55584
  5. Angga Kurniawan 
    Department of Chemistry, Faculty of Mathematics and Natural Sciences , Islamic University of Indonesia, Jl. Kaliurang Km 14.5, Yogyakarta 55584
  1. Encinar, J.M., Gonza´ lez, J.F., and Rodrı´guez-Reinares, A., (2005) Biodiesel from used frying oil. variables affecting the yields and characteristics of the biodiesel, Industrial Engineering Chemical Research, 44, pages 5491 – 5499.
  2. Faccini, C.S., Espinosa da Cunha, M., Moraes, M.S.A., Krause, L.C., Manique, M.C., Rodrigues, M.R.A., Benvenutti, E.V., and Caramão, E.B., (2011) Dry washing in biodiesel purification: a comparative study of adsorbents, Journal of Brazilian Chemical Society, Vol. 22, No. 3, pages 558-563.
  3. Freedman, B., Pryde, E.H., Mounts, T.L. (1984) Variables affecting the yields of fatty esters from transesterfied vegetable oils, Journal of the American Oil Chemists Society, 61 (10), page 1638-1643.
  4. Guan, G., and Kusakabe, K. (2009) Synthesis of biodiesel fuel using an electrolysis method, Chemical Engineering Journal, 153, pages 159-163.
  5. Leung D.Y.C., Wu X., and Weung M.K.H. (2010) A review on biodiesel production using catalyzed transesterification, Applied Energy, 87, pages 1083-1095.
  6. Mittelbach, M., (1996) Diesel fuel derived from vegetable oils, VI: Specifications and quality control of biodiesel, Bioresource Technology, 56, pages 7-11.
  7. Indexmundi (2013) Indonesia Palm Oi Domestic Comsumption per Year. http://indexmundi.com/agriculture/ (accessible 6 Januari 2014)