KINETIC MODELING OF PRESSURE AND EQUIVALENCE RATIO EFFECTS ON METHANEOXIDATION

The kinetics of methane oxidation in a jet-stirred reactor was modeled using a comprehensive kinetic reaction mechanism including the most r ecent findings concerning the kinetics of the reactions involved in th e oxidation of C1-C4 hydrocarbons. The computed results are discussed in terms of pressure and equivalence ratio (phi) effects on methane ox idation. The previously validated mechanism is able to reproduce exper imental data obtained in our high-pressure jet stirred reactor (concen tration profiles for CH4, CO, CO2, H-2, C2H4, C2H6, et C2H2; 900 less- than-or-equal-to T/K less-than-or-equal-to 1300; 1 less-than-or-equal- to P/atm less-than-or-equal-to 10; 0.1 less-than-or-equal-to phi less- than-or-equal-to 2) and methane ignition delay times measured in shock tube (800 less-than-or-equal-to T/K less-than-or-equal-to 2000; 1 les s-than-or-equal-to P/atm less-than-or-equal-to 13; 0.1 less-than-or-eq ual-to phi less-than-or-equal-to 2). It is also able to reproduce H an d O atoms concentrations measured in shock tube at almost-equal-to 2 a tm. Burning velocities of methane in air between 1 and 3 atm and metha ne-air flame structures were also modeled. The same detailed kinetic m echanism can also be used to model the oxidation of ethane, ethylene, propene, and propane in similar conditions.