A Detailed Chemical Kinetics Mechanism for Biogas and Syngas Combustion

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atmire.migration.oldid4966
dc.contributor.advisorMohamad, Abdulmajeed
dc.contributor.advisorJiang, Lei-Yong
dc.contributor.authorLee, Hsu Chew
dc.contributor.committeememberGollahalli, Subramanyam
dc.contributor.committeememberMahinpey, Nader
dc.contributor.committeememberJohansen, Craig
dc.contributor.committeememberDu, Ke
dc.date.accessioned2016-10-04T17:09:59Z
dc.date.available2016-10-04T17:09:59Z
dc.date.issued2016
dc.date.submitted2016en
dc.description.abstractThe interests in alternative renewable fuels such as syngas and biogas have intensified the search for an accurate chemical kinetics model to describe the combustion of syngas and biogas fuels. Unfortunately, a generally accepted mechanism for the fuels of interest remains elusive. Therefore, this thesis is aimed at developing the most up-to-date chemistry model for syngas and biogas combustion. Based on comprehensive comparison between several notable mechanisms available in the literature, the NUIG2013 mechanism [1] was found to have the closest agreement with the experimental data for H2 –CO–CH4 –CO2 fuel mixtures diluted with N2 and H2O. However, the NUIG2013 mechanism failed to predict accurately the ignition delay time at several experimental conditions and the NUIG2013 consists of too many irrelevant species and reactions for syngas and biogas combustion purpose. Therefore, sensitivity analysis were conducted to identify the cause of discrepancies observed between the predicted results and experimental data, and Genetic Algorithm (GA) approach was proposed and validated to optimally extract relevant reactions for H2/CO/CH4/CO2 mixtures from the detailed NUIG2013 chemical kinetics mechanism. Two new rate constants for H+O2(+CO2) = HO2(+CO2) and CH4+OH = CH3+H2O reactions were proposed based on the sensitivity analysis, and it was found that the modified rate constants reconciled the observed discrepancies between the predicted and the measured results. The GA eliminated 1777 insensitive reactions in the NUIG2013 mechanism [1], where the final detailed chemical kinetics model presented in this thesis for biogas/syngas fuel mixtures comprised of 290 reactions and 72 species. The final detailed chemical kinetics model with the incorporation of the two modified rate constants was validated against a large set of experimental data, and excellent agreements were found between the predicted and experimental data. Consequently, the final mechanism presented in this thesis is currently the most up-to-date detailed chemical kinetics mechanism that is suitable for predicting the combustion properties of biogas/syngas accurately.en_US
dc.identifier.citationLee, H. C. (2016). A Detailed Chemical Kinetics Mechanism for Biogas and Syngas Combustion (Doctoral thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/24711en_US
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/24711
dc.identifier.urihttp://hdl.handle.net/11023/3381
dc.language.isoeng
dc.publisher.facultyGraduate Studies
dc.publisher.institutionUniversity of Calgaryen
dc.publisher.placeCalgaryen
dc.rightsUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.
dc.subjectEngineering--Automotive
dc.subjectEngineering--Environmental
dc.subjectEngineering--Mechanical
dc.subject.classificationChemical Kineticsen_US
dc.subject.classificationLaminar Flame Speedsen_US
dc.subject.classificationIgnition Delay Timeen_US
dc.subject.classificationBiogasen_US
dc.subject.classificationSyngasen_US
dc.titleA Detailed Chemical Kinetics Mechanism for Biogas and Syngas Combustion
dc.typedoctoral thesis
thesis.degree.disciplineMechanical and Manufacturing Engineering
thesis.degree.grantorUniversity of Calgary
thesis.degree.nameDoctor of Philosophy (PhD)
ucalgary.item.requestcopytrue
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