Choi, Bong Keun Kim, Seung-Mo Kim, Kyung-Min Lee, Ung Choi, Jeong Ho Lee, Jong-Seop Baek, Il Hyun Nam, Sung Chang Moon, Jong-Ho 2024-01-19T14:00:35Z 2024-01-19T14:00:35Z 2021-10-21 2021-09-01 1385-8947 https://pubs.kist.re.kr/handle/201004/116477 Experimental data on CO2 solubility in diisopropanolamine (DIPA) and methyldiethanolamine (MDEA) blended aqueous solutions were measured at different amine blending ratios and working temperatures. The successive (iterative) substitution method was implemented to calculate the molar fractions of all chemical species, including molecules and electrolytes, from equilibrium along with four material balances and one electro-neutrality equation. The electrolyte universal quasi-chemical (electrolyte UNIQUAC) model was used to consider the nonideality in the liquid phase. The partial pressures of CO2 in the gas phase and molar fractions of all components in the liquid phase were recalculated using thermodynamic models. In addition, the effect of the blending ratio of DIPA, MDEA, and H2O was investigated and expressed using the newly applied triangular diagrams of pH, heat of absorption, and cyclic capacity of CO2 according to the absorption and stripping conditions. English ELSEVIER SCIENCE SA VAPOR-LIQUID-EQUILIBRIA EXCESS GIBBS ENERGY GAS-ALKANOLAMINE SYSTEMS LOCAL COMPOSITION MODEL CARBON-DIOXIDE AQUEOUS-SOLUTIONS HYDROGEN-SULFIDE NRTL MODEL N-METHYLDIETHANOLAMINE REACTION-KINETICS Amine blending optimization for maximizing CO2 absorption capacity in a diisopropanolamine - methyldiethanolamine - H2O system using the electrolyte UNIQUAC model Article 10.1016/j.cej.2021.129517 1 CHEMICAL ENGINEERING JOURNAL, v.419 CHEMICAL ENGINEERING JOURNAL 419 scie scopus 000663788800002 2-s2.0-85103776318 Engineering, Environmental Engineering, Chemical Engineering Article VAPOR-LIQUID-EQUILIBRIA EXCESS GIBBS ENERGY GAS-ALKANOLAMINE SYSTEMS LOCAL COMPOSITION MODEL CARBON-DIOXIDE AQUEOUS-SOLUTIONS HYDROGEN-SULFIDE NRTL MODEL N-METHYLDIETHANOLAMINE REACTION-KINETICS CO2 solubility Diisopropanolamine (DIPA) Methyldiethanolamine (MDEA) Blended amine Electrolyte universal quasi-chemical (electrolyte UNIQUAC) model Cyclic capacity