Combustion of methane and ethane with CO2 replacing N2 as a diluent. Modelling of combined effects of detailed chemical kinetics and thermal properties on the early stages of combustion

Constant Volume Autoignition of Premixed Methane-Carbon Dioxide Mixtures

“…When the concentrations are considered without accounting for the differences in the values of the third body efficiencies, the effect of CO 2 chemistry is to consistently reduce the pre-ignition reactions times by a small factor for all four sets of initial conditions. These results are consistent with those reported in the literature for similar mixtures (Yossefi et al, 1995). Also, through a comparison of the results of case 2 and that of case 3, it is observed that the effect of the artificial changes in the physical properties of CO 2 is to slow the pre-ignition reactions for all four sets of initial conditions considered.…”

Working fluid composition effects on methane oxycombustion in an SI-engine: EGR vs. CO2

“…Previous work has evaluated oxycombustion engines theoretically, and experimentally measured laminar flame speeds (S L ), auto-ignition, and extinction properties of oxycombustion mixtures [9][10][11], but experimental engine results are not available in the open literature. Furthermore, no previous studies were found addressing the effect of mixtures of CO 2 and H 2 O in the dilution gas.…”

Experimental and kinetic modeling study of the oxy-fuel oxidation of natural gas, CH4 and C2H6

“…Flame studies on CH 4 combustion, where nitrogen was replaced as diluent with carbon dioxide [17][18][19][20][21][22], indicate that the chemical effects of CO 2 addition are very important. Flow reactor studies have identified the chemical effects of the high CO 2 concentration on the oxy-fuel combustion of CO [13,23] and CH 4 [24,25], analyzing the influence of temperature and stoichiometry.…”