Influence of cetane number improver on performance and emissions of a common-rail diesel engine fueled with biodiesel-methanol blend

doi:10.1007/s11708-011-0163-9

Front Energ

2011, Vol. 5

Issue (4) : 412-418 https://doi.org/10.1007/s11708-011-0163-9

RESEARCH ARTICLE

Influence of cetane number improver on performance and emissions of a common-rail diesel engine fueled with biodiesel-methanol blend

Wu YU, Gen CHEN, Zuohua HUANG(

)

State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China

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Abstract

In this paper, the effect of cetane number (CN) improver on performance and emissions, including particulate number concentration and size distribution, of a turbocharged, common-rail diesel engine fueled with biodiesel-methanol were studied. Two volume fractions (0.3% and 0.6%) of CN improver were added to BM30 (30% of methanol in the biodiesel-methanol blend) in the experiment. The results show that, compared with those of biodiesel-methanol blend, the peak value of cylinder pressure increases, the second peak of heat release rate decreases, the start of second heat release are advanced, and the fuel economy and thermal efficiency are improved when CN improver is added to biodiesel-methanol blend. Besides, CO and HC emissions decrease, NO_x emission varies little and smoke emissions increase slightly. Moreover, exhaust particles of BM30 mainly distribute in nano-size range. Furthermore, particle number concentration decreases and peak of size distribution profile shifts toward large size direction.

Keywords biodiesel methanol common-rail (CR) diesel engine cetane number (CN) improver

Corresponding Author(s): HUANG Zuohua,Email:zhhuang@mail.xjtu.edu.cn

Issue Date: 05 December 2011

Cite this article:

Wu YU,Gen CHEN,Zuohua HUANG. Influence of cetane number improver on performance and emissions of a common-rail diesel engine fueled with biodiesel-methanol blend[J]. Front Energ, 2011, 5(4): 412-418.

URL:

https://academic.hep.com.cn/fie/EN/10.1007/s11708-011-0163-9
https://academic.hep.com.cn/fie/EN/Y2011/V5/I4/412

Tab.1 Engine specifications

Fig.1 Schematic diagram of the test bench

Tab.2 Properties of fuels and CN improver

Fig.2 Cylinder pressure and heat release rate of different fuels

Fig.3 BSFC and BTE of different fuels

Fig.4 Brake specific CO emissions

Fig.5 Brake specific HC emissions

Fig.6 Brake specific NO emissions

Fig.7 Smoke emissions

Fig.8 Particle number-size distributions of exhaust gases

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