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Influence of Combustion Characteristics and Fuel Composition on Exhaust PAHs in a Compression Ignition Engine

Author

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  • Hamisu Adamu Dandajeh

    (Department of Mechanical Engineering, Ahmadu Bello University, Zaria PMB 1045, Nigeria
    Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, UK)

  • Midhat Talibi

    (Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, UK)

  • Nicos Ladommatos

    (Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, UK)

  • Paul Hellier

    (Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, UK)

Abstract

This paper reports an experimental investigation into the effects of fuel composition on the exhaust emission of toxic polycyclic aromatic hydrocarbons (PAHs) from a diesel engine, operated at both constant fuel injection and constant fuel ignition modes. The paper quantifies the US EPA (United State Environmental Protection Agency) 16 priority PAHs produced from combustion of fossil diesel fuel and several model fuel blends of n -heptane, toluene and methyl decanoate in a single-cylinder diesel research engine based on a commercial light duty automotive engine. It was found that the level of total PAHs emitted by the various fuel blends decreased with increasing fuel ignition delay and premixed burn fraction, however, where the ignition delay of a fuel blend was decreased with use of an ignition improving additive the level of particulate phase PAH also decreased. Increasing the level of toluene present in the fuel blends decreased levels of low toxicity of two to four ring PAH, while displacing n -heptane with methyl decanoate increased particulate phase adsorbed PAH. Overall, the composition of the fuels investigated was found to have more influence on the concentration of exhaust PAHs formed than that of combustion characteristics, including ignition delay, peak heat release rate and the extent of the premixed burn fractions.

Suggested Citation

  • Hamisu Adamu Dandajeh & Midhat Talibi & Nicos Ladommatos & Paul Hellier, 2019. "Influence of Combustion Characteristics and Fuel Composition on Exhaust PAHs in a Compression Ignition Engine," Energies, MDPI, vol. 12(13), pages 1-19, July.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:13:p:2575-:d:245565
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    References listed on IDEAS

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    1. Knecht, Walter, 2008. "Diesel engine development in view of reduced emission standards," Energy, Elsevier, vol. 33(2), pages 264-271.
    2. Singh, S.P. & Singh, Dipti, 2010. "Biodiesel production through the use of different sources and characterization of oils and their esters as the substitute of diesel: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 14(1), pages 200-216, January.
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    Cited by:

    1. Yuehan Qiao & Gang Lyu & Chonglin Song & Xingyu Liang & Huawei Zhang & Dong Dong, 2019. "Optimization of Programmed Temperature Vaporization Injection for Determination of Polycyclic Aromatic Hydrocarbons from Diesel Combustion Process," Energies, MDPI, vol. 12(24), pages 1-13, December.
    2. Nadir Yilmaz & Francisco M. Vigil & Alpaslan Atmanli & Burl Donaldson, 2022. "Detailed Analysis of PAH Formation, Toxicity and Regulated Pollutants in a Diesel Engine Running on Diesel Blends with n-Propanol, n-Butanol and n-Pentanol," Energies, MDPI, vol. 15(17), pages 1-14, September.
    3. Cabrera-Jiménez, Richard & Mateo-Sanz, Josep M. & Gavaldà, Jordi & Jiménez, Laureano & Pozo, Carlos, 2022. "Comparing biofuels through the lens of sustainability: A data envelopment analysis approach," Applied Energy, Elsevier, vol. 307(C).

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