Daniel Holmberg

Chapter 31 – Techno-Economic Evaluation of an Oxyfuel Power Plant Using Mixed Conducting Membranes

Publisher Summary This chapter evaluates the techno-economic performance of gas turbine power plants with zero or low CO2 emission. The plant concepts make use of “Mixed Conducting Membranes” (MCMs) to extract oxygen from the inlet air and thus enable combustion of gaseous hydrocarbon fuels in a nitrogen-free environment. Three different base configurations are identified, each run in two different modes with and without supplementary firing. These six cases are compared to a conventional non-capture, gas turbine plant. The thermodynamic process simulations showed penalties in terms of the net electrical efficiency between 2.4 and 6.8%-points for the different configurations. These penalties include the capture, purification, and compression of the carbon dioxide. The economic evaluation revealed very promising figures, estimating costs of CO2 avoided from 17.3 US

Method of generating energy in a power plant comprising a gas turbine, and power plant for carrying out the method

/ton to as low as 7.3 US

Methods and apparatus for starting up emission-free gas-turbine power stations

/ton, if a value of 20 US

Operating emission-free gas turbine power plant involves feeding some compressed circulated gas directly to combustion chamber, cooling/humidifying some gas before feeding to combustion chamber

/ton produced CO2 is considered.