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based absorption system with pipeline transport and geologic sequestration has been developed; other options shown in Appendix A are still under construction. • Parameters controlling the performance of the CO2 system: The main parameters include the CO2 capture efficiency, MEA concentration, maximum and lean CO2 loadings of the solvent, regeneration heat requirement, pressure drop across the system, MEA make-up requirement, pump efficiency, compressor efficiency and several others. These parameters are used to calculate the solvent flow rate, MEA requirement, and energy penalty of the CO2 system. Functional relationships and default values for all model parameters were developed based on engineering fundamentals, a detailed review of the literature, and several contacts with experts in the field. All of these performance parameters directly affect the cost of the system. Here is a brief description of the various input parameters to the CO2 system. 3.3.1. Parameters obtained from the “reference base plant” The amine-based CO2 capture system gets the following inputs from the (reference) base plant: Gross plant size = MWg Net plant size (after env’l. controls) = MWnoctl • Flue gas composition and flow rate (as entering into the amine system) This is an array of molar flow rates of different gas components that include N2, O2, H2O, CO2, CO, HCl, SO2, SO3, NO, NO2 and mass flow rate of particulates. The total molar flow rate of the flue gas is G, and the molar fraction of CO2 in the flue gas is yCO2. Temperature of flue gas = Tfg Plant capacity factor = PCF (%) Annual hours of operation = HPY = (PCF/100)*365*24 hrs/yr 3.3.2. Parameters to configure the CO2 system These are the choices the user can make in order to configure the CO2 capture system. • Flue gas cooler: Whether to include DCC (default) or excluded • Sorbent regeneration steam supply: Steam extraction from the base plant (default, internal derating) or Steam generated from an auxiliary NG boiler (w/ ST) • Mode of CO2 product transportation: Via pipelines (default) or any other means. • Mode of CO2 storage/ disposal: Underground geologic reservoir (default) or EOR or ECBM or Depleted oil/gas wells or Ocean 3.3.3. Parameters controlling the performance of the CO2 system Parameters controlling the performance of the CO2 system: The numerical values to the input parameters are specified by the user. The intermediate and final output parameters are then derived using the performance equations. It may be noted that the user can override any of these values, but may want to change values of all the relevant parameters to avoid inconsistencies. Integrated Environmental Control Model - Technical Documentation • 17PDF Image | Amine Based CO2 Capture
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