Although MDEA is the most commonly used absorbent, DEAwith a mass fraction of 35% is chosen in this study, for compari-son of results with those in the previous studies (Abdulrahman andAlbarzenji, 2012; Halim and Srinivasan, 2009). Another reason forchoosing DEA is due to high partial pressure of CO2in the feedstock.Kohl (1997a) showed that concentrated DEA (25–30% by weight) isa suitable absorbent for feedstock with high CO2