Develop the model of a sour-water stripper (SWS) as shown in Figure E13.7(a). Consider the following ionic reactions:

For this system do the following:

1. Simulate both an equilibrium-stage and a nonequilibrium-stage model and compare the key results such as reflux ratio (RR), reboiler duty, and so on.

2. For comparison, also simulate an equilibrium-stage and a nonequilibrium-stage model without considering the electrolyte chemistry, that is, without the ionic reactions.

3. Develop another nonequilibrium-stage model without considering the fourth reaction.

The desired specification for the separation is that the bottom product should not have more than 30 ppmw NH₃ and 10 ppmw H₂S and the top product should have 25% (mole basis) acid gases (H₂S and CO₂).

Transcribed Image Text:

Sour Water 1 kmol/s 40°C 3 atm 99.75 wt% H₂O 0.1 wt% NH3 0.15 wt% H₂S 1 2 Pcond = 2 atm T-2001 10 Trays Kettle-Type Reboiler 3 Acid Gas Stripped Water Figure E13.7(a) Schematic of the Sour-Water Stripper (SWS) Column H₂O H+ + OH- H₂S H+ + HS¯ HSH+ + S-² NH3 + H₂O NH+ + OH-