Simulation of CO2 Recovering Closed Gas Turbine with CH4-O2 Firing.

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  • EBARA Takumi
    Institute for Energy Utilization, National Institute of Advanced Industrial Science and Technology
  • IKI Norihiko
    Institute for Energy Utilization, National Institute of Advanced Industrial Science and Technology
  • TAKAHASHI Sanyo
    Institute for Energy Utilization, National Institute of Advanced Industrial Science and Technology
  • HAMA Jun
    Institute for Energy Utilization, National Institute of Advanced Industrial Science and Technology

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To reduce CO2 emission and environmental impact, it is needed to develop the clean and higher efficiency power generation system. So, the CO2 recovering semi closed gas turbine with CH4-O2 firing has been noted with its high efficiency and low emission capability. Such a high efficiency is a result of a high turbine inlet temperature. Though, high temperature causes the increase of emission level such as CO and H2 because of an incomplete reaction. Although, incomplete reaction can be suppressed in an oxidation surroundings actualized by excess oxygen feeding, it causes a decrease of system efficiency. So, chemical kinetic calculations are carried out to clarify the trade-off relationship between these parameters. The characteristics of pollutant formation and its oxidation processes are analyzed. An optimal equivalent ratio for the total system efficiency and emission is also estimated.

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