Second case study: CO2 absorber / desorber process (Dore 1994)

• Manipulated input:

  • Reboiler steam flow rate

• Controlled output:

  • CO2 product concentration

• Unmeasured disturbances:

  • Feed CO2 concentration
  • Feed CO2 flow rate
  • Reboiler steam quality
  • Condenser duty
  • MEA concentration variations

Absorption

column

Desorption

column

Reboiler

Product

Condenser

HX

Cooler

Monoethanolamine

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