IECM 12.0 beta User Manual > Modules Included with the IECM > Pulverized Coal (PC) Plant > GET RESULTS > CO2 Capture, Transport & Storage > 1. Amine System >

O&M Cost

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This is a standard O&M cost result screen. The amine system in PC and NGCC plants has the following variable cost components:

•Sorbent: (Not shown for Cansolv .) This is the annual cost of the sorbent used in the system. It is a function of the concentration of CO2 in the flue gas and the flue gas flow rate.

•Process Chemicals: (Only shown for Cansolv .) Process Chemicals include Ion Exchange Resin, NaOH, Cansolv Solvent and Triethylene Glycol.

•Auxiliary Gas (PC) or Natural Gas (NGCC): If the user has added an auxiliary natural gas boiler, the cost of the natural gas used to fuel the boiler is added here.

•Corrosion Inhibitor: (Not shown for Cansolv .) The inhibitor helps in two ways: reduced sorbent degradation and reduced equipment corrosion. This is the annual cost of the corrosion inhibitor.

•Activated Carbon: (Not shown for Cansolv .) This is the cost of activated carbon used to adsorb impurities from the sorbent (degradation products of MEA).

•Caustic (NaOH): (Not shown for Cansolv .) This is the annual cost of caustic. The presence of acid gas impurities (SO2, SO3, NO2 and HCl) in the flue gas leads to formation of heat stable salts in the sorbent stream, which cannot be dissociated even on application of heat. In order to avoid accumulation of these salts in the sorbent stream and to recover some of this lost MEA sorbent, a part of the sorbent stream is periodically distilled in this vessel. Addition of caustic helps in freeing of some of the MEA. The recovered MEA is taken back to the sorbent stream while the bottom sludge (reclaimer waste) is sent for proper disposal.

•Reclaimer Waste Disposal: (Not shown for Cansolv .) This is the reclaimer waste disposal cost per year.

•Electricity: The cost of electricity consumed by the amine system.

•Auxiliary Power Credit: An auxiliary natural gas boiler can be added by the user to provide steam and power for the amine system. If it is added by the user then the additional power it provides is subtracted from the overall operating and maintenance cost.

•Water: This is the annual cost for water to the amine scrubber system; it is mainly required for cooling and also as process makeup.

•CO2 Transport: The CO2 captured at the power plant site has to be carried to the appropriate storage/disposal site. Transport of CO2 to a storage site is assumed to be via pipeline. This is the annual cost of maintaining those pipelines.

•CO2 Storage: Once the CO2 is captured, it needs to be securely stored (sequestered). This cost is based on option chosen on the T&S Config parameter screen .

•Auxiliary CCS Cooling System: (Only shown when an Air Cooled Condenser is configured.) This is the cost of the auxiliary cooling system needed when an Air Cooled Condenser is used as the plant cooling system for a PC or NGCC plant.