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

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

Energy, 2012, vol. 47, issue 1, 515-521

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.

Keywords: n-butanol; Low temperature combustion; Fuel property; Emissions (search for similar items in EconPapers)
Date: 2012
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Citations: View citations in EconPapers (28)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:47:y:2012:i:1:p:515-521

DOI: 10.1016/j.energy.2012.09.020

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