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Research Papers: Gas Turbines: Combustion, Fuels, and Emissions

Effect of Cetane Improver on Combustion and Emission Characteristics of Coal-Derived Sasol Isomerized Paraffinic Kerosene in a Single Cylinder Diesel Engine

[+] Author and Article Information
Ziliang Zheng

Wayne State University,
5050 Anthony Wayne Drive Suite 2100,
Detroit, MI 48202
e-mail: zhengziliang@gmail.com

Umashankar Joshi

Wayne State University,
5050 Anthony Wayne Drive Suite 2100,
Detroit, MI 48202
e-mail: umashankar.joshi84@gmail.com

Naeim Henein

Wayne State University,
5050 Anthony Wayne Drive Suite 2100,
Detroit, MI 48202
e-mail: henein@eng.wayne.edu

Eric Sattler

U.S. Army RDECOM-TARDEC,
6501 E 11 Mile Road,
Warren, MI 48092

Contributed by the Combustion and Fuels Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received October 24, 2014; final manuscript received November 14, 2014; published online January 7, 2015. Editor: David Wisler.The United States Government retains, and by accepting the article for publication, the publisher acknowledges that the United States Government retains, a non-exclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this work, or allow others to do so, for United States government purposes. UNCLASSIFIED: Distribution Statement A. Approved for public release.

J. Eng. Gas Turbines Power 137(7), 071506 (Jul 01, 2015) (11 pages) Paper No: GTP-14-1589; doi: 10.1115/1.4029207 History: Received October 24, 2014; Revised November 14, 2014; Online January 07, 2015

Sasol isomerized paraffinic kerosene (IPK) is a coal-derived synthetic fuel under consideration as a blending stock with JP-8 for use in military ground vehicles. Since Sasol IPK is a low ignition quality fuel with derived cetane number (DCN) of 31, there is a need to improve its ignition quality. This paper investigates the effect of adding different amounts of Lubrizol 8090 cetane improver to Sasol IPK on increasing its DCN. The experimental investigation was conducted in a single cylinder research type diesel engine. The engine is equipped with a common rail injection system and an open engine control unit. Experiments covered different injection pressures and intake air temperatures. Analysis of test results was made to determine the effect of cetane improver percentage in the coal-derived Sasol IPK blend on auto-ignition, combustion and emissions of carbon monoxide (CO), total unburned hydrocarbon (HC), oxides of nitrogen (NOx), and particulate matter (PM). In addition, the effect of cetane improver on the apparent activation energy of the global auto-ignition reactions was determined.

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Figures

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Fig. 1

Schematic of single cylinder engine setup

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Fig. 2

Definition of ignition delay from the pressure trace

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Fig. 3

Pressure, RHR, and N.L traces for the three fuels

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Fig. 4

Detailed RHR traces for different fuels at same SOI

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Fig. 5

Normalized cumulative heat release for the three fuels

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Fig. 6

Pressure, RHR, and N.L traces for the three fuels at 50 and 110 °C

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Fig. 7

Detailed RHR traces for the three fuels at 50 and 100 °C

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Fig. 8

Pressure, RHR, and N.L traces for the three fuels at different injection pressure

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Fig. 9

Detailed RHR for three fuels at different injection pressure

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Fig. 10

CO emissions versus injection pressure for the three fuels

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Fig. 11

HC emissions versus injection pressure for the three fuels

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Fig. 12

NOx emissions versus injection pressure for the three fuels

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Fig. 13

Average particulate number distribution for the three fuels at 800 bar injection pressure

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Fig. 14

Average particulate mass distribution for the three fuels at 800 bar injection pressure

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Fig. 15

Average particulate number distribution for the three fuels at 400 bar injection pressure

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Fig. 16

Average particulate mass distribution for the three fuels at 400 bar injection pressure

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Fig. 17

Arrhenius plot of ID versus the mean temperature for three fuels

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Fig. 18

Correlation between apparent activation energy and the percentage of the cetane improver

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