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The Potential of Esters as Renewable Fuels: Determination of Laminar Burning Velocities

Ali Hamdi Bnayan, Anas LU (2013) In Master thesis/ Lund University FYSM31 20131
Department of Physics
Abstract
The Potential of Esters as Renewable Fuels: Determination of Laminar Burning Velocities

Biodiesel fuel is widely used as a clean fuel in car engines. Ester fuels are a one kind of a biodiesel fuel which includes many chemical compounds. Due to their chemical and physical properties these esters are difficult to investigate in a laboratory. The heat flux method was used in this study to determine adiabatic burning velocity. The heat flux method for determination of laminar burning velocities is a useful method since the property can be determined directly, without corrections or extrapolations that apply to other burning methods.

The heat flux method is a very efficient technique to determine the adiabatic burning velocity of liquid... (More)
The Potential of Esters as Renewable Fuels: Determination of Laminar Burning Velocities

Biodiesel fuel is widely used as a clean fuel in car engines. Ester fuels are a one kind of a biodiesel fuel which includes many chemical compounds. Due to their chemical and physical properties these esters are difficult to investigate in a laboratory. The heat flux method was used in this study to determine adiabatic burning velocity. The heat flux method for determination of laminar burning velocities is a useful method since the property can be determined directly, without corrections or extrapolations that apply to other burning methods.

The heat flux method is a very efficient technique to determine the adiabatic burning velocity of liquid fuel. The primary goal of this project is to provide new and accurate measurements of the laminar burning velocity of five bio-fuel (ester group). The second goal was to investigate the laminar flame speed propagation with carbon chain length from C3 to C7.

In the present study, the burning velocity of straight chain acetate ester fuels (methyl acetate, ethyl acetate and n-propyl acetate) have been determined. The laminar burning velocities of C3-C5 esters/air were measured by liquid heat flux installation at atmospheric pressure, initial temperatures (298-348 K) and equivalence ratios (0.7-1.5). There is no literature date available apart from the data found in this work, so a comparison between these results is performed at different temperatures for each ester. A good resemblance can be claimed from this comparison and limited studies related to these fuels; whereas, all results curvatures have the same trends and the maximum velocity for each temperature under study found at φ=1.1. Also, the results of esters are compared against each other and other esters found in literature at the same temperature in order to assess the effects of carbon chain length on laminar burning velocity. A good resemblance is found between ester group and alkane group with corresponding carbon chain length. Lastly, temperature dependencies with laminar flame speeds have been studied and power exponents have been determined as a function of equivalence ratio.

This research presents new experimental data for the biodiesel ester group. The adiabatic burning velocity of these esters was determined using the heat flux method. The results presented can be assumed with high level of accuracy ±1 cm/s. (Less)
Please use this url to cite or link to this publication:
author
Ali Hamdi Bnayan, Anas LU
supervisor
organization
course
FYSM31 20131
year
type
H2 - Master's Degree (Two Years)
subject
keywords
Laminar burning velocity, Flame speed, Heat flux method, Ester fuels, renewable energy
publication/series
Master thesis/ Lund University
language
English
id
3516054
date added to LUP
2013-03-01 23:18:47
date last changed
2013-03-01 23:18:47
@misc{3516054,
  abstract     = {The Potential of Esters as Renewable Fuels: Determination of Laminar Burning Velocities 

Biodiesel fuel is widely used as a clean fuel in car engines. Ester fuels are a one kind of a biodiesel fuel which includes many chemical compounds. Due to their chemical and physical properties these esters are difficult to investigate in a laboratory. The heat flux method was used in this study to determine adiabatic burning velocity. The heat flux method for determination of laminar burning velocities is a useful method since the property can be determined directly, without corrections or extrapolations that apply to other burning methods. 

The heat flux method is a very efficient technique to determine the adiabatic burning velocity of liquid fuel. The primary goal of this project is to provide new and accurate measurements of the laminar burning velocity of five bio-fuel (ester group). The second goal was to investigate the laminar flame speed propagation with carbon chain length from C3 to C7.

In the present study, the burning velocity of straight chain acetate ester fuels (methyl acetate, ethyl acetate and n-propyl acetate) have been determined. The laminar burning velocities of C3-C5 esters/air were measured by liquid heat flux installation at atmospheric pressure, initial temperatures (298-348 K) and equivalence ratios (0.7-1.5). There is no literature date available apart from the data found in this work, so a comparison between these results is performed at different temperatures for each ester. A good resemblance can be claimed from this comparison and limited studies related to these fuels; whereas, all results curvatures have the same trends and the maximum velocity for each temperature under study found at φ=1.1. Also, the results of esters are compared against each other and other esters found in literature at the same temperature in order to assess the effects of carbon chain length on laminar burning velocity. A good resemblance is found between ester group and alkane group with corresponding carbon chain length. Lastly, temperature dependencies with laminar flame speeds have been studied and power exponents have been determined as a function of equivalence ratio. 

This research presents new experimental data for the biodiesel ester group. The adiabatic burning velocity of these esters was determined using the heat flux method. The results presented can be assumed with high level of accuracy ±1 cm/s.},
  author       = {Ali Hamdi Bnayan, Anas},
  keyword      = {Laminar burning velocity,Flame speed,Heat flux method,Ester fuels,renewable energy},
  language     = {eng},
  note         = {Student Paper},
  series       = {Master thesis/ Lund University},
  title        = {The Potential of Esters as Renewable Fuels: Determination of Laminar Burning Velocities},
  year         = {2013},
}