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Impact of Using n-Octanol/Diesel Blends on the Performance and Emissions of a Direct-Injection Diesel Engine

Author

Listed:
  • Jongkap Ahn

    (Training Ship Operation Center, Gyeongsang National University, 2 Tongyeonghaean-ro, Tongyeong 53064, Republic of Korea)

  • Kwonwoo Jang

    (Technical Research Laboratories, POSCO, 6261 Donghaean-ro, Pohang 37859, Republic of Korea)

  • Jeonghyeon Yang

    (Department of Mechanical System Engineering, Gyeongsang National University, 2 Tongyeonghaean-ro, Tongyeong 53064, Republic of Korea)

  • Beomsoo Kim

    (Department of Mechanical System Engineering, Gyeongsang National University, 2 Tongyeonghaean-ro, Tongyeong 53064, Republic of Korea)

  • Jaesung Kwon

    (Department of Mechanical System Engineering, Gyeongsang National University, 2 Tongyeonghaean-ro, Tongyeong 53064, Republic of Korea)

Abstract

This study evaluates the viability of n-octanol as an alternative fuel in a direct-injection diesel engine, aiming to enhance sustainability and efficiency. Experiments fueled by different blends of n-octanol with pure diesel were conducted to analyze their impacts on engine performance and emissions. The methodology involved testing each blend in a single-cylinder engine, measuring engine performance parameters such as brake torque and brake power under full-load conditions across a range of engine speeds. Comparative assessments of performance and emission characteristics at a constant engine speed were also conducted with varying loads. The results indicated that while n-octanol blends consistently improved brake thermal efficiency, they also increased brake-specific fuel consumption due to the lower energy content of n-octanol. Consequently, while all n-octanol blends reduced nitrogen oxide emissions compared to pure diesel, they also significantly decreased carbon monoxide, hydrocarbons, and smoke opacity, presenting a comprehensive reduction in harmful emissions. However, the benefits came with complex trade-offs: notably, higher concentrations of n-octanol led to a relative increase in nitrogen oxide emissions as the n-octanol ratio increased. The study concludes that n-octanol significantly improves engine efficiency and reduces diesel dependence, but optimizing the blend ratio is crucial to balance performance improvements with comprehensive emission reductions.

Suggested Citation

  • Jongkap Ahn & Kwonwoo Jang & Jeonghyeon Yang & Beomsoo Kim & Jaesung Kwon, 2024. "Impact of Using n-Octanol/Diesel Blends on the Performance and Emissions of a Direct-Injection Diesel Engine," Energies, MDPI, vol. 17(11), pages 1-21, June.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:11:p:2691-:d:1407062
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    References listed on IDEAS

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    1. Li, Li & Wang, Jianxin & Wang, Zhi & Liu, Haoye, 2015. "Combustion and emissions of compression ignition in a direct injection diesel engine fueled with pentanol," Energy, Elsevier, vol. 80(C), pages 575-581.
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