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PFI (port fuel injection) of n-butanol and direct injection of biodiesel to attain LTC (low-temperature combustion) for low-emissions idling in a compression engine

Author

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  • Soloiu, Valentin
  • Duggan, Marvin
  • Harp, Spencer
  • Vlcek, Brian
  • Williams, David

Abstract

In this study, n-butanol (port fuel injection) PFI was investigated in a direct injection compression ignition engine while at idling speeds, and loads, 1–3 bar IMEP (indicated mean effective pressure) in order to determine the effects on combustion, efficiency, emissions, and specifically, a modified tradeoff of soot and nitrogen oxides. As a result, the engine entered into (low-temperature combustion) LTC regions, for selected loads and speeds. Compared with the baseline taken with ultra-low sulfur diesel no. 2, the heat release with n-butanol in (premixed charge compression ignition) PCCI mode, has resulted in a 75% reduction from the maximum values, while a secondary peak appeared where the diffusion combustion typically occurs in the power stroke. At 3 bar IMEP an early, (bottom dead center) BTDC low-temperature heat release was found that began 6° earlier than for the diesel reference cycle, and corresponding to 1200 K. Soot emissions showed a massive decrease of about 98%, concurrently with a 74% reduction of nitrogen oxides at 3 IMEP by controlling the combustion phases and by modifying the classical NOx–soot tradeoff. The results of this work prove that biodiesel combined with n-butanol PFI in PCCI and LTC are very effective in simultaneously reducing soot and NOx at idling speeds.

Suggested Citation

  • Soloiu, Valentin & Duggan, Marvin & Harp, Spencer & Vlcek, Brian & Williams, David, 2013. "PFI (port fuel injection) of n-butanol and direct injection of biodiesel to attain LTC (low-temperature combustion) for low-emissions idling in a compression engine," Energy, Elsevier, vol. 52(C), pages 143-154.
  • Handle: RePEc:eee:energy:v:52:y:2013:i:c:p:143-154
    DOI: 10.1016/j.energy.2013.01.023
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    References listed on IDEAS

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    1. Marchetti, J.M. & Miguel, V.U. & Errazu, A.F., 2007. "Possible methods for biodiesel production," Renewable and Sustainable Energy Reviews, Elsevier, vol. 11(6), pages 1300-1311, August.
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