Written in English
The oxidation of saturated (i.e methyl butanoate) and unsaturated (i.e. methyl crotonate) C4 fatty acid methyl esters in an opposed flow diffusion flame has been studied to better understand the role of molecular structure in biodiesel combustion. The results indicate that the methyl crotonate flame produces higher levels of unsaturated hydrocarbons, which are known soot precursors in combustion applications. In addition, higher levels of acrolein, acetone, methanol, and benzene are observed in the methyl crotonate flame. The double bond in methyl crotonate is identified as the reason for the observed differences in species formation.The experiments are also used to validate an improved detailed chemical kinetic model for methyl butanoate. The model exhibits good agreement with the experimental data. The major reaction pathways for methyl butanoate oxidation in the opposed flow diffusion flame are presented herein.
|The Physical Object|
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In order to study in detail the effect of the FAME molecular structure on the combustion chemistry, a saturated (i.e., methyl butanoate) and an unsaturated (i.e., methyl crotonate) C 4 FAME were oxidized in an opposed flow diffusion flame and a jet stirred reactor. Some consistent trends were seen in both by: Kinetic Study of Methyl Palmitate Oxidation in a Jet-Stirred Reactor and an Opposed-Flow Diffusion Flame Using a Semidetailed Mechanism. Combustion Science and Technology , (5), DOI: / Vahid Saheb, Sayyed Mohammad Ali by: Kinetic Study of Methyl Palmitate Oxidation in a Jet-Stirred Reactor and an Opposed-Flow Diffusion Flame Using a Semidetailed Mechanism. Combustion Science and Technology , (5), DOI: / Elna J. K. Nilsson, Alexander A. by: This skeletal mechanism containing only species was applied to study the methyl oleate oxidation in an opposed-flow diffusion flame and the combustion phasing under the diesel engine conditions.
Methyl heptanoate (MHP) is a potential surrogate component for fatty acid methyl esters found in biodiesel. The carbon chain length of MHP is long enough to enable low temperature (low-T) reactivity and negative temperature coefficient oxidation behavior during the combustion experiments, similar to the real biodiesel fuels. Kinetic Study of Methyl Palmitate Oxidation in a Jet-Stirred Reactor and an Opposed-Flow Diffusion Flame Using a Semidetailed Mechanism. Combustion Science and Technology , (5), The oxidation of methyl heptanoate was studied experimentally in a jet-stirred reactor at 10 atm and a constant residence time of s, over the temperature range − K, and for fuel-lean to fuel-rich conditions. Concentration profiles of reactants, stable intermediates, and final products were obtained by sonic probe sampling followed by online GC and FTIR and off-line GC analyses. More free energy is released during the citric acid cycle than during glycolysis, but only 1 mole of ATP is produced for each mole of acetyl CoA that enters the cycle. Most of the remaining free energy produced during the citric acid cycle is a. used to synthesize GTP. b. used to reduce electron carriers. c. lost as heat. d. used to reduce.
Experimental and kinetic modeling of methyl octanoate oxidation in an opposed-flow diffusion flame and a jet-stirred reactor fatty acid methyl esters for use in compression ignition engines. A comparison of saturated and unsaturated C4 fatty acid methyl esters in an opposed flow diffusion flame and a jet stirred reactor. Proceedings of the Combustion Institute , 31 (1), M. J. Thomson's 53 research works with 1, citations and 4, reads, including: The importance of reversibility in modeling soot nucleation and condensation processes. Methyl decanoate is considered to be a favorable biodiesel surrogate with sufficient carbon chain length to mimic important long-chain components in biodiesel such as CC22 fatty acid methyl esters (FAMEs),. From a chemical point of view, MD possesses a carbomethoxy group which is the typical characteristic of biodiesel.