Journal
JOURNAL OF PHYSICAL CHEMISTRY A
Volume 116, Issue 24, Pages 6142-6158Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp211434f
Keywords
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Funding
- European Commission
- COST Action [CM0901]
- CINES [2011086686]
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This paper revisits the primary reactions involved in the oxidation of n-butane from low to intermediate temperatures (550-800 including the negative temperature coefficient (NTC) zone. A model that was automatically generated is used as a starting point and a large number of thermochemical and kinetic data are then re-estimated. The kinetic data of the isomerization of alkylperoxy radicals giving center dot QOOH radicals and the subsequent decomposition to give cyclic ethers has been calculated at the CBS-QB3 level of theory. The newly obtained model allows a satisfactory prediction of experimental data recently obtained in a jet-stirred reactor and in rapid compression machines. A considerable improvement of the prediction of the selectivity of cyclic ethers is especially obtained compared to previous models. Linear and global sensitivity analyses have been performed to better understand which reactions are of influence in the NTC zone.
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