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- W2090766747 abstract "Ketohydroperoxide formation in Cl-atom initiated low-temperature (550–700 K) oxidation of n-butane was investigated using a time-of-flight mass spectrometer and either tunable synchrotron radiation or a H2 discharge for photoionization. Experiments were performed at 1–2 atm pressure using a new high-pressure reactor and also at ∼5 Torr pressure for comparison. Direct kinetic observations of ketohydroperoxide formation qualitatively agree with previous atmospheric pressure jet-stirred reactor studies of Battin-Leclerc et al. (Angew. Chem. Int. Ed., 49 (2010) 3169–3172) where the maximum ketohydroperoxide signal was observed near 600 K. Oxidation of partially deuterated n-butanes provided additional information on the QOOH radical intermediates that proceed to form ketohydroperoxides. The photoionization spectrum of the observed ketohydroperoxide is independent of pressure and is the same when using different deuterium substituted n-butanes, suggesting that one ketohydroperoxide isomer dominates in n-butane oxidation. We conclude that 4-hydroperoxy-2-butyl + O2 is the main reaction leading to ketohydroperoxide and 3-hydroperoxybutanal is the sole ketohydroperoxide that is observed." @default.
- W2090766747 created "2016-06-24" @default.
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- W2090766747 date "2015-01-01" @default.
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- W2090766747 title "Probing the low-temperature chain-branching mechanism of n -butane autoignition chemistry via time-resolved measurements of ketohydroperoxide formation in photolytically initiated n- C 4 H 10 oxidation" @default.
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- W2090766747 doi "https://doi.org/10.1016/j.proci.2014.05.011" @default.
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