Study of Gasohol as Alternative Fuel for Gasoline Substitution: Characteristics and Performances

DOI: https://doi.org/10.14710/ijred.3.3.175-183

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Article Info
Published: 15-10-2014
Section: Original Research Article
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Gasohol is a mixture of premium petrol (gasoline) with alcohol, in this case ethanol. The use of gasohol can reduce fuel consumption without having to modify the existing engine. Therefore, this research is conducted to study the characteristics and performance of gasohol in various mixing ratios, which includes analysis of physical properties and the use of gasohol in the machine. Results show that the addition of technical ethanol at 7.0169%v increases the value of gasohol vapor pressure on the value of 8.6682 psi (7.7 psi for regular gasoline). Gasohol with technical ethanol content above 30%v decreases vapor pressure, promotes phase separation, and causes a sharp drop in temperature from 40%v distillation. In term of corrosivity, gasohol with up to 50%v ethanol content has the same corrosion level with regular gasoline, which is corrosion level 1A. Based on gasohol characteristics test, it is known that gasohol with technical ethanol content below 20%v can be used as a fuel substitute for gasoline. Real-time performance test of gasohol in engines has shown that the addition of ethanol content in gasohol tend to increase the engine power at a certain compression ratio, but it also increases fuel consumption because the heat value of ethanol is lower than gasoline. Machine in gasohol with ethanol content below 20%v can operate smoothly without having to modify the engine. Based on the studies that have been done, gasohol in the range of 10%v ethanol content is well-functioned as a substitute for gasoline fuel and meets fuel specifications required by the General Director of Oil and Gas. The feasibility of using gasohol as an alternative fuel can be studied further.

Keywords

gasoline; gasohol; fuel specifications; performance

  1. Bardi Murachman 
    Laboratory of Petroleum, Gas and Coal, Department of Chemical Engineering, Faculty of Engineering, Gadjah Mada University, Yogyakarta, Indonesia
  2. Dicky Pranantyo 
    Laboratory of Petroleum, Gas and Coal, Department of Chemical Engineering, Faculty of Engineering, Gadjah Mada University, Yogyakarta, Indonesia
  3. Eddie Sandjaya Putra 
    Laboratory of Petroleum, Gas and Coal, Department of Chemical Engineering, Faculty of Engineering, Gadjah Mada University, Yogyakarta, Indonesia
  1. ASTM, 1985, ASTM Standard on Petroleum Products and Lubricants, pp. 19-177, The American Society for Testing Materials, Philadelphia.
  2. Bolt, J.A., 1980, A Survey of Alcohol as a Motor Fuel, SAE PT-80/19.
  3. Hardjono, A., 2001, Teknologi Minyak Bumi, edisi pertama, pp. 39-45, 63-76, Gadjah Mada University Press, Yogyakarta.
  4. Joseph Jr., H., 2004, Ethanol Application as Vehicular Fuel in Brazil, The Conference on Biofuel: Challenges for Asian Future, Bangkok, 30-31 Aug 2004.
  5. Keller, J.L., 1984, Ethanol and Methanol as Fuel, Encyclopedia of Chemical Processing and Design, vol. 20, J. McKetta and W. Cunningham, pp. 11-39, Marcel Dekker, New York.
  6. Kirk and Othmer, 1981, Encyclopedia of Chemical Technology, vol. 8, 3 ed., John Wiley and Sons, Inc., New York.
  7. Kontawa, A., 1987, Minyak Bumi – Pengklasifikasian dan Evaluasi, Bahan Ceramah dan Kursus-kursus, Pusat Pengembangan Teknologi Minyak dan Gas Bumi LEMIGAS, Jakarta.
  8. Lang, G.J. and Palmer, F.H., 1989, Gasoline And Diesel Fuel Additives: The Use of Oxygenates in Motor Gasolines, Critical Reports on Applied Chemistry, vol. 25, K. Owen ed., pp. 133-169, John Wiley & Sons, New York.
  9. Meridian Corporation (Fuel and Transportation Division), 1991, Properties of Alcohol Transportation Fuels – Alcohol Fuels Reference Work #1, Biofuels System Division, Office of Alternative Fuels, U.S. D.O.E., Jul 1991.
  10. Murachman, B., 2000, Pemanfaatan Alkohol sebagai Campuran Bahan Bakar Fraksi Bensin, Jurusan Teknik Kimia Universitas Gadjah Mada, Yogyakarta.
  11. Scheller, W.A. and Mohr, B.J., 1977, Gasoline Does, Too, Mix with Alcohol, Chemtech, Oct 1977, pp. 616-623.
  12. Szwarc, A., 2004, Fuel Ethanol Production and Use: A Technical Overview, The Conference on Biofuel: Challenges for Asian Future, Bangkok, 30-31 Aug 2004.
  13. Thomas, V. and Kwong, A., 2001, Ethanol as a Lead Replacement: Phasing Out Leaded Gasoline in Africa, Energy Policy 2001, 29, pp. 1133-1143.
  14. http://www.chevron.com/products/prodserv/fuels/bulletin/motorgas/downloads/Motor_Fuels_Tch_Rvw_chp4.pdf