IECM 12.0 beta User Manual > Modules Included with the IECM > Integrated Gasification Combined Cycle (IGCC) Plant > SET PARAMETERS > CO2 Capture, Transport & Storage > 1. Water Gas Shift Reactor >

Performance

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Inputs for the performance of the water gas shift reactor (WGSR) are entered on the Performance parameter screen . The following parameters are shown:

•Water Gas Shift Reactor Unit:

•CO to CO2 Conversion Efficiency: Most of the CO in the raw syngas is converted into CO2 through the Water Gas Shift reaction. CO2 is removed from the shifted syngas through a physical absorption unit. This variable is the percentage of CO that is converted to CO2 in the reaction.

•COS to H2S Conversion Efficiency: COS is difficult to remove in the Selexol unit, so a polishing unit is added to convert COS to H2S. This is the conversion efficiency of the polishing unit.

•Steam Added: This parameter determines the amount of water added to the shift reactor in converting CO to CO2. The moles of steam added is proportional to the moles of CO converted.

•Maximum Train CO2 Capacity: The maximum production rate of CO2 is specified here. It is used to determine the number of operating trains required.

•Number of Operating Trains: This is the total number of operating trains. It is used primarily to calculate capital costs. The value must be an integer.

•Number of Spare Trains: This is the total number of spare trains. It is used primarily to calculate capital costs. The value must be an integer.

•Thermal Energy Credit: The Water Gas Shift reaction is an exothermic process, producing heat that can be extracted and converted to steam for use in generating electricity. This is the thermal energy credit for steam produced and used in the steam cycle.