Conformational inversion-topomerization mechanism of ethylcyclohexyl isomers and its role in combustion kinetics
Type
ArticleKAUST Department
Clean Combustion Research CenterDate
2016-07-26Online Publication Date
2016-07-26Print Publication Date
2017Permanent link to this record
http://hdl.handle.net/10754/621735
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Show full item recordAbstract
With the "strain-free" cyclic structure, cyclohexane and alkyl cyclohexanes (and their radicals) have various conformers (e.g. chair, boat, and twist etc.) by pseudorotation of the alkyl ring. Noting that different conformers will undergo different types of H-migration reactions, the mechanism of conformational change may impact the distribution of cyclohexyl and the branched cyclohexyl radical isomers during cyclohexane and alkyl cyclohexanes combustion. Consequently, it will influence the formation of subsequent decomposition products. In this work, the conformational inversion-topomerization mechanism and H-migration reactions for six ethylcyclohexyl radical isomers were systematically studied by ab initio calculations and the transition state theory. The updated sub-mechanism of these conformational changes is incorporated into an ethylcyclohexane pyrolysis model. By comparing the simulated results of the "complete" model including the sub-mechanism of conformational changes and the simplified model ignoring these processes, the effect of inversion-topomerization mechanism on the relative concentrations of various ethylcyclohexyl radicals and the formation of subsequent decomposition products were revealed. © 2016.Citation
Bian H, Wang Z, Sun J, Zhang F (2016) Conformational inversion-topomerization mechanism of ethylcyclohexyl isomers and its role in combustion kinetics. Proceedings of the Combustion Institute. Available: http://dx.doi.org/10.1016/j.proci.2016.07.049.Sponsors
National Natural Science Foundation of China[21303174, 51376174, 51376170]Publisher
Elsevier BVae974a485f413a2113503eed53cd6c53
10.1016/j.proci.2016.07.049