CO 2 absorption capacity using aqueous potassium carbonate with 2-methylpiperazine and piperazine

Abstract

Various amines as a promoter have been added to the K 2CO 3 solution in order to improve the performance of the CO 2 absorption process. Piperazine (PZ) and 2-methylpiperazine (2-MPZ), cyclic diamines were used as promoters in this study. The equilibrium partial pressure of CO 2 ( P CO 2 ∗ ) and pressure changes were measured at 313, 333 and 353 K condition of flue gas using VLE (vapor–liquid equilibrium) equipment. The results show that 2-MPZ possesses the ability to promote CO 2 absorption capacity. The K 2CO 3/2-MPZ solution had an equilibrium partial pressure of CO 2 that was lower than that of the MEA solution at 333 K.