Improvement of the Modeling of the Low-Temperature Oxidation of n-Butane: Study of the Primary Reactions

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• 作者：Maximilien Cord ; Baptiste Sirjean ; Ren茅 Fournet ; Alison Tomlin ; Manuel Ruiz-Lopez ; Fr茅d茅rique Battin-Leclerc
• 刊名：The Journal of Physical Chemistry A
• 出版年：2012
• 出版时间：June 21, 2012
• 年：2012
• 卷：116
• 期：24
• 页码：6142-6158
• 全文大小：1200K
• 年卷期：v.116,no.24(June 21, 2012)
• ISSN：1520-5215

文摘

This paper revisits the primary reactions involved in the oxidation of n-butane from low to intermediate temperatures (550鈥?00 K) 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 ^{鈥?/sup>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.}