Chemical Engineering @ChemengFiles.Com

The amines are a solvent widely used in the removal of H2S and CO2 present in the natural gas. It is generally known as gas sweetening and acid gas remover.

Usually the H2S and CO2 absorb and react with amine in the absorption tower to then be sent to the regeneration tower. The regenerated amine then return to the absorption tower. The H2S and CO2 flashed the regeneration tower is sent to a thermal oxidizer to be destroyed. In the event that the amount of H2S is significant, this is normally sent to the sulfur recovery unit to recover sulfur as a byproduct.

There are a number of softwares such as Aspen HYSYS, SULSIM, PROMAX, AMSIM, etc. available on the market that are widely used by process engineers to simulate the path of the amine in the process. HYSYS contains the Li-Mather model and Kent-Eisenberg for the presence of amine system.

What model should I use? Termoideales Are there packages and non-ideal, which should be used?

Li-Mather is a fundamental and rigorous model while the Kent-Eisenberg method is more empirical. With enough data and field study that provides the model Li Mather and limiting the Kent-Eisenberg method (limited run) it is recommended to use Li-Mather method for design purposes. It is advisable that the designer evaluate the same process with the Kent-Eisenberg method.

The non-ideal heat pack is taking into account kinetic effects. Therefore, the non-ideal heat pack is usually employed when the feed contains a significant amount of CO2 (slow reaction). To feed increased proportion of H2S, the impact on results is minimal because the reaction is fast.