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Compression ignition of low-octane gasoline: Life cycle energy consumption and greenhouse gas emissions


  • Hao, Han
  • Liu, Feiqi
  • Liu, Zongwei
  • Zhao, Fuquan


The use of low-octane gasoline on Gasoline Compression Ignition (GCI) engines is considered as a competitive alternative to the conventional vehicle propulsion technologies. In this study, a process-based, well-to-wheel conceptualized life cycle assessment model is established to estimate the life cycle energy consumption and greenhouse gas (GHG) emissions of the conventional gasoline-Spark Ignition (SI) and low-octane gasoline-GCI pathways. It is found that compared with the conventional pathway, the low-octane gasoline-GCI pathway leads to a 24.6% reduction in energy consumption and a 22.8% reduction in GHG emissions. The removal of the isomerization and catalytic reforming units in the refinery and the higher energy efficiency in the vehicle use phase are the substantial drivers behind the reductions. The results indicate that by promoting the use of low-octane gasoline coupled with the deployment of GCI vehicles, considerable reductions of energy consumption and GHG emissions in the transport sector can be achieved. However, significant technical and market barriers are still to be overcome. The inherent problems of NOx and PM exhaust emissions associated with GCI engines need to be further addressed with advanced combustion techniques. Besides, the yield of low-octane gasoline needs to be improved through adjusting the refinery configurations.

Suggested Citation

  • Hao, Han & Liu, Feiqi & Liu, Zongwei & Zhao, Fuquan, 2016. "Compression ignition of low-octane gasoline: Life cycle energy consumption and greenhouse gas emissions," Applied Energy, Elsevier, vol. 181(C), pages 391-398.
  • Handle: RePEc:eee:appene:v:181:y:2016:i:c:p:391-398
    DOI: 10.1016/j.apenergy.2016.08.100

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    References listed on IDEAS

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    1. repec:eee:appene:v:204:y:2017:i:c:p:1476-1488 is not listed on IDEAS
    2. Badra, Jihad & Viollet, Yoann & Elwardany, Ahmed & Im, Hong G. & Chang, Junseok, 2016. "Physical and chemical effects of low octane gasoline fuels on compression ignition combustion," Applied Energy, Elsevier, vol. 183(C), pages 1197-1208.


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