Micro gas turbine combustor performances in CO2/O2 oxidizer atmosphere

In fossil fuel energy power plants the oxy-combustion technique, is one of the possible approaches to the problem of greenhouse gases emissions, through the CO2 capture and subsequent storage. It is realized using recirculated flue gas enriched with oxygen as oxidizer and it is suitable more than other techniques to retrofit existing plants. The commercial gas turbine combustors currently available are however designed and optimized for air combustion. In this work, through a series of CFD simulations, a typical commercial micro turbine burner has been tested in oxy-combustion conditions, in order to verify the performances. Through this study it has been shown how these class of combustors cannot be used in an optimal way in terms of efficiency, pollutant emissions and oxygen consumption. Some possible solutions have been also proposed.