Dry-Ice Formation and Solid–Fluid Equilibrium

A CO₂-containing stream is expanded to conditions where solid CO₂ (dry ice) forms directly within the process simulation. The downstream separator calculates the solid–fluid phase equilibrium, with solid CO₂ leaving in the bottom stream while the remaining gas continues according to the equilibrium conditions. The solid-formation model has been carefully validated against experimental data and gives excellent agreement for both pure CO₂ and mixtures, illustrating fully integrated prediction of solids in TP-Process.