EXPERIMENTAL-STUDY AND KINETIC MODELING OF HIGHER HYDROCARBONS OXIDATION IN A JET-STIRRED FLOW REACTOR

The oxidation of n-decane and n-propylcyclohexane was studied in a jet-stirred flow reactor in the temperature range 873-1033 K at atmospheric pressure. The concentrations of molecular species were measured at different extents of reaction by gas chromatography. The main hydrocarbon intermediates formed in both hydrocarbons oxidation were ethylene, propene, methane, 1,3-butadiene, and ethane. In the oxidation of n-decane, 1-butene was also formed in significant concentration and several other unsaturated hydrocarbons were detected as minor products: 1-pentene, 1-hexene, 1-heptene, 1-octene, and 1-nonene. In the oxidation of n-propylcyclohexane, 1,3-pentadiene, cyclopentadiene, pentene, benzene, methylcyclohexene, and cyclohexene were found as minor products. On the basis of the experimental observation of a low concentration level for large hydrocarbon intermediates, quasi-global chemical kinetic reaction mechanisms were developed to reproduce the experimental data.