IECM 14.0 beta User Manual > Modules Included with the IECM > Low-Carbon Hydrogen Production & Transport > SET PARAMETERS > Syngas Cleanup > Water Gas Shift + MDEA >

MDEA Performance

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Inputs for configuring the performance of the MDEA CO2 Capture System are entered on the MDEA Performance parameter screen. The following parameters are provided:

•Sorbent Concentration: The solvent used for CO2 absorption is a mixture of methyl diethanolamine (MDEA) and water. This parameter is read-only and is shown for reference.

•Lean CO2 Loading: The regenerated (or lean) solvent contains some "left-over" CO2. The level of lean solvent CO2 loading mainly depends upon the initial CO2 loading in the solvent and the amount of regeneration heat supplied, or alternatively, the regeneration heat requirement depends on the allowable level of lean sorbent loading. This parameter is read-only and is shown for reference.

•Liquid-to-Gas Ratio: The liquid-to-gas ratio is the ratio of the total molar flow rate of the liquid (MEA sorbent plus water) to the total molar flow rate of the f syngas being treated in the absorber. This parameter is read-only and is shown for reference.

•Regenerator Heat Requirement: This is the total amount of heat energy required in the reboiler for sorbent regeneration. This parameter is read-only and is shown for reference.

•Increase in Solvent Pumping Pressure: This parameter defines the pressure increase of the solvent circulation. This parameter is read-only and is shown for reference.

•Pump Efficiency: The pump in the MDEA unit is used to recirculate the MDEA solution in the system. Pump Efficiency measures how effectively the pump converts mechanical energy from the shaft into fluid pressure. An ideal pump would be reversable, and adiabatic means 100% efficient. Real pumps have turbulence, internal fluid friction, and recirculation losses.

•Pump Driver Efficiency: A driver is the electric motor used for spinning the pump shaft. Its efficiency determines how effectively the motor converts electric energy into mechanical shaft energy.

•Syngas Cleanup Cooling Duty: This parameter defines the cooling water requirement for the MDEA-based CO2 capture process.