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Glycerol as an Anti-Knock Additive and Secondary Fuel as a Substitute for Gasoline-Based Fuels for the IC Engine

Author

Listed:
  • Stanislaw Szwaja

    (Department of Thermal Machinery, Faculty of Mechanical Engineering and Computer Science, Czestochowa University of Technology, Dabrowskiego 69, 42-200 Czestochowa, Poland)

  • Michal Gruca

    (Department of Thermal Machinery, Faculty of Mechanical Engineering and Computer Science, Czestochowa University of Technology, Dabrowskiego 69, 42-200 Czestochowa, Poland)

  • Michal Pyrc

    (Department of Thermal Machinery, Faculty of Mechanical Engineering and Computer Science, Czestochowa University of Technology, Dabrowskiego 69, 42-200 Czestochowa, Poland)

  • Romualdas Juknelevičius

    (Faculty of Mechanics, Vilnius Gediminas Technical University, Plytinės g. 25, LT-10105 Vilnius, Lithuania)

Abstract

The article discusses the possibility of using glycerol as an additive to the engine fuel in order to reduce the tendency of combustion knock, and thus to increase the octane number of a given fuel. Experimental tests were carried out on the UIT-85 research engine with a variable compression ratio from eight to eleven to test the intensity of the knock. The completely renewable fuel—the blend of glycerol with butanol in the ratio of 25 and 75%, respectively—was tested. A comparative analysis of the knock intensity was conducted with gasoline 95 and N -butanol tested as reference fuels. The developed method for knock analysis using the proposed knock indicator was also presented. The experimental results proved the proposed blend of N -butanol and glycerol reduces the knock intensity by more than 50% in the spark-ignition engine at a compression ratio of 10, maintaining engine performance at a similar level as it was for a gasoline-fueled engine. The results confirmed the thesis on the reduction of knock intensity when adding glycerol to N -butanol.

Suggested Citation

  • Stanislaw Szwaja & Michal Gruca & Michal Pyrc & Romualdas Juknelevičius, 2023. "Glycerol as an Anti-Knock Additive and Secondary Fuel as a Substitute for Gasoline-Based Fuels for the IC Engine," Energies, MDPI, vol. 16(13), pages 1-15, June.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:13:p:4940-:d:1179158
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    References listed on IDEAS

    as
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    3. Feng, Dengquan & Wei, Haiqiao & Pan, Mingzhang & Zhou, Lei & Hua, Jianxiong, 2018. "Combustion performance of dual-injection using n-butanol direct-injection and gasoline port fuel-injection in a SI engine," Energy, Elsevier, vol. 160(C), pages 573-581.
    4. Michal Gruca & Michal Pyrc & Magdalena Szwaja & Stanislaw Szwaja, 2020. "Effective Combustion of Glycerol in a Compression Ignition Engine Equipped with Double Direct Fuel Injection," Energies, MDPI, vol. 13(23), pages 1-14, December.
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