Stable Combustion under Carbon Dioxide Enriched Methane Blends For Exhaust Gas Recirculation (EGR)

Exhaust gas recirculation (EGR) is one of the main techniques to enable use oxyfuel combustion for carbon capture and storage (CCS). However, recirculated streams with elevated dioxide poses different challenges. Thus, more research required about cumulative effects on desirable outcomes processes such as thermal efficiency, reduced emissions system operability, when fuels high CO2 concentration CCS exhaust or biogas are used. Therefore, this study evaluates various enriched methane blends their response towards formation a great variety structures that appear in swirling flows, which mechanism control current turbines systems. The uses 100 kW acoustically excited swirl-stabilised burner investigate flow field resultant variation swirl strength, excitation under isothermal condition corresponding during at concentrations. Results show changes size location result mean turbulent velocities field, consequence imposition forcing conditions. Improved efficiency also observed using while blend balanced heat release fluctuation reduction acoustic amplitudes response, suggesting certain concentrations fuel can provide stable flames. Concentrations between 10% 15% volume promise stability improvement, potential these findings larger units employ technologies.