How the Presence of CO2 Absorption Promoters and Composition of the Choline Chloride/Amine/Molecular Solvent Mixtures Influence Its Thermophysical Properties and Ability to Absorb Carbon Dioxide

The present research provides data on the density (ρ), viscosity (η) and ability to absorb carbon dioxide of systems containing amine, molecular solvent (MS) choline chloride (ChCl), with investigation physical properties both neat amine/MS/ChCl mixtures their samples after complete CO2 saturation. effect mixture composition was studied by varying amine from primary (monoethanolamine, MEA) secondary (diethanolamine, DEA) tertiary (triethanolamine, TEA) degree its substitution a mono- (MEA, DEA doubly-substituted (ethylenediamine, EDA) compound. role an MS investigated via exchange ethylene glycol (EG) water dimethylsulfoxide (DMSO). In addition, influence absorption promoters in ternary MEA/EG/ChCl at amount 5 wt. % also investigated. We show that increase ρ η amine/EG/ChCl affects amines. This suggests mixtures, nature interspecies interactions is very similar those previously system. When EG exchanged for H2O or DMSO, decrease were observed. A comparison corresponding composed each pair components indicates intensity and/or number stronger than pure H2O, DMSO MEA. While presence no significant changes found, CO2-saturated samples, increased proportionally absorbed gas. case all research. overall EG-based decreased when going amines; it 21% higher MEA/H2O/ChCl system compared which, turn, showed capacities. added mixture, highest capacity found piperazine-containing