Kinetic modeling of isobutanol combustion requires a reliable chemical kinetic submodel for the pyrolysis and oxidation of isobutene. To establish the validity of a base model, validation tests need to be performed for the oxidation of isobutane and isobutene against a wide range of experimental observations. In this study, over 50 sets of data are considered, including previously published data of laminar flame speeds, shock tube ignition delay, species concentrations in a jet stirred reactor and a new set of burner-stabilized premixed flame data. The new premixed laminar flame structures for both isobutene and isobutane at fuel rich (phi＝1.60) and stoichiometric (phi＝1.00) conditions are determined at low pressures (20 or 30 torr) by flame-sampling molecular-beam mass spectrometry (MBMS) in combination with single-photon synchrotron ionization. The results consist of mole fraction profiles of reactants, products and the well-identified stable and reactive intermediates. Satisfactory agreement is obtained between USC Mech II predictions and the experimental data.
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