Research Papers: Fuel Combustion

Investigation on Di-(2-Methoxypropyl) Carbonate Used as a Clean Oxygenated Fuel for Diesel Engine

[+] Author and Article Information
Zhengxi Guo

State Key Laboratory for Chemistry and
Molecular Engineering of Medicinal Resources,
School of Chemistry and Pharmaceutical
Guangxi Normal University,
Guilin 541004, China
e-mail: guo_zhengxi1992@163.com

Hejun Guo

Sixth Department,
Xi’an Research Institute of High Technology,
Hongqing Town,
Xi’an 710025, China
e-mail: cn.ghj_2002@163.com

Qingping Zeng

Sixth Department,
Xi’an Research Institute of High Technology,
Hongqing Town,
Xi’an 710025, China
e-mail: 2762108051@qq.com

1Corresponding author.

Contributed by the Internal Combustion Engine Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received October 4, 2016; final manuscript received June 22, 2017; published online August 16, 2017. Assoc. Editor: Stephen A. Ciatti.

J. Energy Resour. Technol 140(1), 012201 (Aug 16, 2017) (8 pages) Paper No: JERT-16-1396; doi: 10.1115/1.4037367 History: Received October 04, 2016; Revised June 22, 2017

Utilization of oxygenated fuels has proven to be able to significantly control diesel engine exhaust emissions. Presented in this paper is a new oxygenated fuel di-(2-methoxypropyl) carbonate (DMPC), which was produced through transesterification reaction using dimethyl carbonate (DMC) and propylene glycol monomethyl ether (PGMME) as reactants as well as potassium hydroxide (KOH) as catalyst. Its structure characterization was completed through analyses with Fourier transform infrared (FT-IR), 1H nuclear magnetic resonance (NMR), and GC-MS analytical techniques. Further study was made about the effect of the oxygenate addition to diesel fuel on chemicophysical properties, combustion performances, and exhaust emissions characteristics. Experimental results displayed that the oxygenated fuel is mutually soluble with diesel fuel in any proportion at ambient temperature around 25 °C. With DMPC introduced to diesel fuel, kinematic viscosity decreases linearly, smoke point increases linearly, and flash point declines remarkably even under low content 5 vol %. Results of combustion test carried out on a single cylinder, DI diesel engine running at 1600 rpm and 2000 rpm showed that CO can be reduced by up to 60.0%, smoke can be lessened by up to 90.2%, while NOx increases by 4.4–14.0% as 15 vol % and 25 vol % of the oxygenate was added to a diesel fuel. Engine in-cylinder peak pressure increases somewhat and ignition delay duration becomes a little shorter. Both engine in-cylinder pressure rising rate and heat release rate increase noticeably during the premixed combustion.

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Fig. 1

Influence of DMPC on fuel kinematic viscosity

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Fig. 2

Effect of DMPC on fuel smoke point

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Fig. 3

Effect of DMPC on fuel flash point

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Fig. 5

Influence of application of DMPC on smoke pollutant emission: (a) 1600 rpm and (b) 2000 rpm

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Fig. 6

Effects of addition of DMPC on NOx pollutant emission: (a) 1600 rpm and (b) 2000 rpm

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Fig. 7

Engine in-cylinder pressures with combustion of different blend fuels: (a) 0.70 MPa, 1600 rpm and (b) 0.56 MPa, 2000 rpm

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Fig. 8

Engine in-cylinder pressure rising rate with combustion of different blend fuels: (a) 0.14 MPa, 1600 rpm and (b) 0.42 MPa, 2000 rpm

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Fig. 9

Engine heat release rates at 1600 rpm: (a) 0.70 MPa, 1600 rpm and (b) 0.70 MPa, 2000 rpm

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Fig. 4

Effect of addition of DMPC on CO pollutant emission: (a) 1600 rpm and (b) 2000 rpm

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Fig. 10

Engine fuel consumption when burning different fuels: (a) 1600 rpm and (b) 2000 rpm

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Fig. 11

Engine energy consumption when burning different fuels: (a) 1600 rpm and (b) 2000 rpm



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