Abstract
Low-pressure (4.0 kPa) premixed laminar 2,5-dimethylfuran (DMF)/oxygen/argon flame with an equivalence ratio of 0.8 was studied with tunable vacuum ultraviolet synchrotron radiation photoionization and molecular-beam mass spectrometry. Photoionization mass spectra of DMF/O<sub>2</sub>/Ar flame and the photoionization efficiency curves of the combustion intermediates were recorded.Ionization energies of the combustion intermediates were obtained from the photoionization efficiency curves. Structures of the combustion intermediates, including the oxidation products and the higher derivatives of DMF, are identified by comparing the measured ionization energies with those reported in literatures or those calculated with quantum chemistry methods. The formation and consumption of DMF and its primary combustion derivatives are proposed based on the combustion intermediates identified.
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