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Research Papers: Fuel Combustion

Study of Combustion Characteristics of Ethanol at Different Dilution With the Carrier Gas

[+] Author and Article Information
Binash Imteyaz

Department of Mechanical Engineering,
King Fahd University of Petrolium and Minerals,
Dhahran 34464, Saudi Arabia;
KACST TIC on CCS,
King Fahd University of Petrolium and Minerals,
Dhahran 34464, Saudi Arabia
e-mail: binashahmad@kfupm.edu.sa

Mohamed A. Habib

Professor
Department of Mechanical Engineering,
King Fahd University of Petrolium and Minerals,
Dhahran 34464, Saudi Arabia;
KACST TIC on CCS,
King Fahd University of Petrolium and Minerals,
Dhahran 34464, Saudi Arabia
e-mail: mahabib@kfupm.edu.sa

1Corresponding author.

Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received August 20, 2014; final manuscript received October 14, 2014; published online November 7, 2014. Editor: Hameed Metghalchi.

J. Energy Resour. Technol 137(3), 032205 (May 01, 2015) (6 pages) Paper No: JERT-14-1262; doi: 10.1115/1.4028866 History: Received August 20, 2014; Revised October 14, 2014; Online November 07, 2014

With the ever-rising concern of global warming, carbon capture is gaining the reputation of one of the most challenging fields of research. A very promising technology to capture CO2 is oxy-combustion. Oxy-combustion offers several advantages over conventional combustion technologies, such as flue–gas volume reduction, high combustion efficiency, low fuel consumption, and significant reduction in NOx emissions. Liquid fuel is available and it is the most widely used source of energy in the world. Easy handling and transporting, less storage volume and higher flame temperature are some of the features of liquid fuel which give it an upper hand over other sources. In this study, an experimental work on oxygen enriched combustion of ethanol in a vertical reactor by Lacas et al. (2005, “Experimental Study of Air Dilution in Oxy-Liquid Fuel Flames,” Proc. Combust. Inst., 30(2), pp. 2037–2045) has been modeled numerically. Nonpremixed model using probability density function (PDF) has been incorporated to simulate the combustion process of ethanol droplets. Predicted combustion characteristics are found to be in good compliance with the experimental data. In addition to this, effects of dilution of carbon dioxide in oxygen on the flame properties have also been presented. Combustion of ethanol in oxygen–carbon dioxide environment has been compared with that of the conventional air environment.

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Figures

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Fig. 1

Schematic diagram of the vertical reactor and the injector

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Fig. 2

Effect of air dilution on flame contour

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Fig. 3

Comparison of numerical radial temperature profile at 32 cm, 44 cm, 62 cm, and 77 cm height with the experimental values

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Fig. 4

Comparison of (a) particle diameter and (b) particle velocities for air case, OF 29 case and OF 21 case, respectively

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Fig. 5

Comparison of temperature contours for the three cases: OF 21(21% O2–79% CO2), air and OF 29(29% O2–71% CO2)

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Fig. 6

Centerline temperature profile

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Fig. 7

Mass fraction of fuel along the centerline

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Fig. 8

Turbulent intensity along the centerline

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Fig. 9

Mass fraction of oxygen along the centerline

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Fig. 10

Wall temperature and incident radiation on wall

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