Investigation of Effective Parameters on Gas Sweetening Process with MDEA-PZ Solvent using Plackett-Burman Approach

Gas sweetening is a process in which acid gases including hydrogen sulfide (H۲S) and carbon dioxide (CO۲) are removed by a solution of water and amines. This process has gained widespread interest in reducing CO۲ emissions to the atmosphere and removing acid gases to prevent corrosion issues in petrochemical down stream processes. In the present work, the effective parameters of the gas sweetening process have been analyzed using the Plackett-Burman design (PBD) with MDEA-PZ solvent. To do so, nine effective parameters including CO۲/H۲S in feed, feed temperature and pressure, tray number and pressure of absorber column, lean Amin temperature, and MDEA/PZ concentrations in solvent have been examined with numerical experiments. Results of the present study showed that the most effective parameters in CO۲ are the number of absorber trays, PZ concentration, and feed pressure. The number of trays and MDEA concentration are the most effective parameters in H۲S recovery. Feed and Lean Amin temperatures are the most effective parameters in plant energy consumption.

Keywords:

Gas sweetening , MDEA , PZ , Plackett-Burman