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 >

Retrofit or Adjustment Factors

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See Retrofit or Adjustment Factor Inputs for an explanation of retrofit costs. The water gas shift reactor (WGSR) has the following capital cost process areas:

•High Temperature Reactor: This area accounts for the high temperature reactor vessel used for water gas shift. The iron-based catalyst is designed to be effective at high temperatures (650-1100 °F). The high temperature reactor has a high reaction rate and converts a large amount of CO into CO2.

•Low Temperature Reactor: This area accounts for the low temperature reactor vessel used for water gas shift. The copper-based catalyst is designed to be effective at lower temperatures (450-650 °F). The low temperature reactor has a lower reaction rate, but converts a very high percentage of the remaining CO into CO2.

•Heat Exchangers: The water gas shift process involves substantial cooling because of the exothermic reaction. Heat is recovered and temperature control is maintained through heat exchangers added after each reactor. This process area accounts for the heat exchangers used. Steam generated in the heat exchangers is sent to the steam cycle.