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An optical investigation of Fischer-Tropsch diesel and Oxymethylene dimethyl ether impact on combustion process for CI engines

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  • Pastor, José V.
  • García, Antonio
  • Micó, Carlos
  • Lewiski, Felipe

Abstract

Synthetic fuels (E-fuels) have shown to be an interesting alternative to replace the fossil diesel fuel due to its CO2 reduction potential as well as for their capability to diminish the soot production and therefore for improving the soot-NOX trade-off in Compression Ignition engines. Thus, the main objective of this paper was to better understand the combustion process and the in-cylinder soot formation of two of the most popular E-fuels currently: Fischer-Tropsch (FT) diesel and Oxymethylene dimethyl ether (OMEX). To achieve this aim, a single cylinder optical CI engine with a commercial piston geometry was used. Thee optical techniques (Natural Luminosity–NL, OH* chemiluminescence and 2-color pyrometry) were applied to analyze the combustion evolution and quantify the soot formation at different loads (1.5, 4.5 and 7.5 bar IMEP). OMEX presented the largest injection duration due to the low LHV. For the NL analysis, OMEX showed the lowest light intensity for the three loads tested, indicating a very low soot production. Despite of the low NL intensity, it presented the highest OH* chemiluminescence signal, indicating a higher presence of near-stoichiometric zones due to the high amount of oxygen. Regarding FT diesel, it showed a combustion behavior similar to the commercial diesel. NL, OH* and 2-color technique analysis indicated that for the three conditions tested, FT diesel presented lower soot production and a faster soot oxidation than commercial diesel.

Suggested Citation

  • Pastor, José V. & García, Antonio & Micó, Carlos & Lewiski, Felipe, 2020. "An optical investigation of Fischer-Tropsch diesel and Oxymethylene dimethyl ether impact on combustion process for CI engines," Applied Energy, Elsevier, vol. 260(C).
    • Handle: RePEc:eee:appene:v:260:y:2020:i:c:s0306261919319257
    DOI: 10.1016/j.apenergy.2019.114238
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    References listed on IDEAS

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    Cited by:

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    2. Pastor, Jose V. & García-Oliver, Jose M. & Micó, Carlos & Tejada, Francisco J., 2023. "Characterization of the oxymethylene ether fuels flame structure for ECN Spray A and Spray D nozzles," Applied Energy, Elsevier, vol. 332(C).
    3. Florian Zacherl & Christoph Wopper & Peter Schwanzer & Hans-Peter Rabl, 2022. "Potential of the Synthetic Fuel Oxymethylene Ether (OME) for the Usage in a Single-Cylinder Non-Road Diesel Engine: Thermodynamics and Emissions," Energies, MDPI, vol. 15(21), pages 1-26, October.
    4. Pastor, José V. & García, Antonio & Micó, Carlos & Lewiski, Felipe & Vassallo, Alberto & Pesce, Francesco Concetto, 2021. "Effect of a novel piston geometry on the combustion process of a light-duty compression ignition engine: An optical analysis," Energy, Elsevier, vol. 221(C).
    5. da Costa, Roberto Berlini Rodrigues & Coronado, Christian J.R. & Hernández, Juan J. & Malaquias, Augusto Cesar Teixeira & Flores, Luiz Fernando Valadão & de Carvalho, João A., 2021. "Experimental assessment of power generation using a compression ignition engine fueled by farnesane – A renewable diesel from sugarcane," Energy, Elsevier, vol. 233(C).
    6. Srivastava, Vivek & Schaub, Joschka & Pischinger, Stefan, 2023. "Model-based closed-loop control strategies for flex-fuel capability," Applied Energy, Elsevier, vol. 350(C).
    7. Lis Corral-Gómez & Octavio Armas & José A. Soriano & José V. Pastor & José M. García-Oliver & Carlos Micó, 2022. "An Optical Engine Used as a Physical Model for Studies of the Combustion Process Applying a Two-Color Pyrometry Technique," Energies, MDPI, vol. 15(13), pages 1-17, June.

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