Removal characteristics of CO(2) using aqueous MEA/AMP solutions in the absorption and regeneration process

The carbon dioxide (CO(2)) removal eficiency, reaction rate, and CO(2) loading into aqueous blended monoethanolamine (MEA) + 2-amino-2-methyl-1-propanol (AMP) solutions to enhance absorption characteristics of MEA and AMP were carried out by the absorption/regeneration process. As a result, compared to aqueous MEA and AMP solutions, aqueous blended MEA + AMP solutions have a higher CO(2) loading than MEA and a higher reaction rate than AMP. The CO(2) loading of rich amine of aqueous 18 wt.% MEA + 12 wt.% AMP solution was 0.62 mol CO(2)/mol amine, which is 51.2% more than 30 wt.% MEA (0.41 mol CO(2)/mol amine). Consequently, blending MEA and AMP could be an effective way to design considering economical eficiency and used to operate absorber for a long time.