• CO 2 molecules are absorbed from a CO 2 /N 2 mixture using amine solutions in the packed column with the aid of Aspen Plus. • Enthalpy, Entropy, and optimized parameters are calculated. • A mixture of amine solutions, such as MEA-DEA, MEA-TEA, MEA-PZ, MEA-DIPA, and MEA-TEA-DEA, is studied on the CO 2 absorption. • The effect of gas temperature, amine temperature, column pressure, amine flow rate, methanol addition, column height, and column diameter is simulated for the CO 2 absorption. • The validation of the simulated results is compared with the industrial data. In this work, Aspen Plus simulation is used to investigate the effect of amine type, amine concentration, amine temperature, gas temperature, column pressure, column diameter, column height, addition of methanol, and amine flow rate on the CO 2 absorption. The CO 2 mole fraction in the output gas stream was decreased from 0.03 at 500 L/h to 0.001 at 3500 L/h, which proves that a higher amine flow rate has a positive effect. The CO 2 mole fraction in the output gas stream was 0.027 by using MEA and 0.031 by using DEA amine solution, which shows that MEA could reduce more CO 2 in comparison to DEA, which proves the better absorption performance of MEA. The CO 2 mole fraction was increased from 0.033 at an amine temperature of 293 K to 0.05 at an amine temperature of 343 K, which shows that the lower amine temperature is suitable. The CO 2 mole fraction was decreased from 0.0185 at the column height of 2 m to 0.002 at the column height of 10 m, which displays that a higher column height has a positive influence. Also, increasing the column diameter from 0.1 m to 0.9 m causes a reduction in the CO 2 mole fraction from 0.0185 to 0.0078. The amount of CO 2 molecules in the output stream of the packed column decreases from 12.23 % to 12.17% by increasing the concentration of blended MEA-TEA from the ratio of 10%: 10% to 20%: 20%. The amount of CO 2 molecules in the output stream of the packed column decreases from 12.13 % to 12.11% by increasing the concentration of blended MEA-PZ from the ratio of 5%: 5% to 20%: 20%. The amount of CO 2 molecules in the output stream of the packed column decreases from 12.01 % to 11.47% by increasing the concentration of blended MEA-DIPA from the ratio of 5%: 5% to 20%: 20%. Finally, the amount of CO 2 molecules in the output stream of the packed column decreases from 12.23 % to 12.13% by increasing the concentration of blended MEA-DEA+TEA from the ratio of 5%: 5% to 20%: 20%.
Masoumi et al. (Sun,) studied this question.