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Experimental study of n-butanol addition on performance and emissions with diesel low temperature combustion

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  • Zhang, Quanchang
  • Yao, Mingfa
  • Zheng, Zunqing
  • Liu, Haifeng
  • Xu, Jia

Abstract

Compared with ethanol or methanol, butanol has higher heating value and higher miscibility. Because of lower cetane number of butanol, butanol-diesel blends are more suitable for diesel low temperature combustion (LTC). In the paper, experimental study was carried out on a modified single cylinder heavy duty diesel engine to investigate the effects of n-butanol and EGR on diesel engine's combustion and emission characteristics. CA50 timing was fixed at 8 °CA ATDC and two different volume fractions (20% and 40%) of n-butanol were blended into diesel fuel. The results showed that with the increase of n-butanol fraction, ignition delay prolonged, (dp/dφ)max increased and indicated thermal efficiency (ITE) had a slight increase. Fuel properties had little effects on NOx emission, but NO proportion decreased and NO2 proportion increased with higher n-butanol fraction. With n-butanol addition, CO and THC (total hydrocarbon) emissions decreased at higher EGR levels, soot emissions reduced greatly and soot-bump was almost eliminated. With the increase of EGR rate, CH4 proportion increased, but n-butanol addition could decrease CH4 proportion.

Suggested Citation

  • Zhang, Quanchang & Yao, Mingfa & Zheng, Zunqing & Liu, Haifeng & Xu, Jia, 2012. "Experimental study of n-butanol addition on performance and emissions with diesel low temperature combustion," Energy, Elsevier, vol. 47(1), pages 515-521.
    • Handle: RePEc:eee:energy:v:47:y:2012:i:1:p:515-521
    DOI: 10.1016/j.energy.2012.09.020
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    References listed on IDEAS

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    1. Rakopoulos, C.D. & Antonopoulos, K.A. & Rakopoulos, D.C., 2007. "Experimental heat release analysis and emissions of a HSDI diesel engine fueled with ethanol–diesel fuel blends," Energy, Elsevier, vol. 32(10), pages 1791-1808.
    2. Demirbas, Ayhan, 2009. "Political, economic and environmental impacts of biofuels: A review," Applied Energy, Elsevier, vol. 86(Supplemen), pages 108-117, November.
    3. Zheng, Junnian & Caton, Jerald A., 2012. "Second law analysis of a low temperature combustion diesel engine: Effect of injection timing and exhaust gas recirculation," Energy, Elsevier, vol. 38(1), pages 78-84.
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