Figure P13.27 is the absorber in an acid-gas removal (AGR) plant.

The solvent, Stream 2, in this plant is a chemical solvent, methyl diethanolamine (MDEA). It is fed to the top of the column. The acid gas, Stream 1, is fed to the bottom of the column. The conditions of Streams 1 and 2 are given in Table P13.27. The column has 20 theoretical stages. Simulate an equilibrium-stage model of this column considering the important ionic reactions and a suitable thermodynamic model for this electrolyte system. The column top pressure is 1.6 atm. Consider the following reactions:

What are the compositions and temperatures of Stream 3 and Stream 4?

Transcribed Image Text:

Solvent 2 1 3 Sweet Gas T-2001 4 Acid Gas Rich Solvent Figure P13.27 Schematic of the Absorber of an AGR Plant Using MDEA as the Solvent