June, 2005
Vol 1 Chapter 31: Techno-economic Evaluation of an Oxyfuel Power Plant Using Mixed Conducting Membranes
Dominikus Bucker, Daniel Holmberg and Timothy Griffin
Abstract: The techno-economic performance of gas turbine power plants with zero or low CO2 emission has been evaluated. 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. This technology is being developed in the ongoing EU FP5 Integrated Research Project “AZEP” (see www.azep.org). Unlike the combined cycle processes investigated in the AZEP project, the concepts considered here are simple cycle configurations. The scenario is based on the CCP Scenario D, a BP gas gathering and processing installation in Prudhoe Bay, Alaska. Three different base configurations were identified, each run in two different modes (with and without supplementary firing). These six cases were 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$/ton to as low as 7.3 US$/ton, if a value of 20 US$/ton produced CO2 (as suggested by CCP) is considered.
Carbon Dioxide Capture for Storage in Deep Geologic Formations – Results from the CO2 Capture Project Capture and Separation of Carbon Dioxide from Combustion Sources - Volume 1
Edited by: David C. Thomas, Senior Technical Advisor, Advanced Resources International Inc, USA
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