Ionic structure of methane flames

dc.contributor.advisor Robert C. Brown
dc.contributor.author Pedersen, Timothy
dc.contributor.department Mechanical Engineering
dc.date 2018-08-16T04:49:44.000
dc.date.accessioned 2020-06-30T07:01:43Z
dc.date.available 2020-06-30T07:01:43Z
dc.date.copyright Tue Jan 01 00:00:00 UTC 1991
dc.date.issued 1991
dc.description.abstract <p>The objective of this research was to predict the structure of ions generated in methane flames. These simulations might lead to a better understanding of the interactions between ions in hydrocarbon flames. It was thought that such an understanding could lead to technology for electrically controlling combustion processes, formation of soot, and heat transfer;The reaction mechanisms used in this study was for a methane or hydrogen/methane flame. It contains reactions for the oxidation of fuels, chemiionization, ion-molecule reactions, and dissociative recombination. A computer model was developed to evaluate the formation of ions based on the proposed reaction mechanism;The computer code developed solved the governing equations of a laminar, premixed, one-dimensional flame immersed in an electric field. It included an iterative method that employed time splitting and finite difference techniques. Time dependent forms of the governing equations were solved until the solution relaxed to steady state;The saturation currents predicted by this model were used to determine the effective activation energies for the ionic phenomena. These values were successfully compared to experimental data. The activation energies were then compared to the values in the reaction mechanism. This led to the prediction of the ionic structure in methane flames;It appears that the depletion of the ions in the flame was by the recombination reaction H[subscript]3O[superscript]+ + e[superscript]- → H + H[subscript]2O. It was also demonstrated that C[subscript]2H[subscript]3O[superscript]+ + H[subscript]2 → H[subscript]3O[superscript]+ + C[subscript]2H[subscript]2 was the rate limiting reaction in determining saturation currents. The activation energy for this reaction was found to be in agreement with the value predicted using the saturation currents.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/rtd/10063/
dc.identifier.articleid 11062
dc.identifier.contextkey 6385027
dc.identifier.doi https://doi.org/10.31274/rtd-180813-11433
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath rtd/10063
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/63168
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/rtd/10063/r_9202384.pdf|||Fri Jan 14 18:12:47 UTC 2022
dc.subject.disciplines Chemical Engineering
dc.subject.disciplines Mechanical Engineering
dc.subject.keywords Mechanical engineering
dc.title Ionic structure of methane flames
dc.type article
dc.type.genre dissertation
dspace.entity.type Publication
relation.isOrgUnitOfPublication 6d38ab0f-8cc2-4ad3-90b1-67a60c5a6f59
thesis.degree.level dissertation
thesis.degree.name Doctor of Philosophy
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