In IGCC plants, operating characteristics of a gas turbine change due to design options such as the integration between the gasification process and the gas turbine. Problems of compressor surge margin reduction and turbine metal overheating may occur...
In IGCC plants, operating characteristics of a gas turbine change due to design options such as the integration between the gasification process and the gas turbine. Problems of compressor surge margin reduction and turbine metal overheating may occur in low integration degree region. The syngas composition also affects the gas turbine operation. According to gasification process and kinds of coal, syngas compositions vary. Moreover, when carbon capture and storage is applied to the gasification process, syngas composition changes very much. This study examines the influence of syngas composition on the operating characteristics of a gas turbine. Four different syngases are considered as fuels of a gas turbine. As the heating value of syngas gets lower, the problems of surge margin reduction and metal overheating become worse. It is suggested that according to each syngas composition, integration degree of gas turbine and gasification process should be designed differently.