1 research outputs found
Absorption Behavior of Acid Gases in Protic Ionic Liquid/Alkanolamine Binary Mixtures
Herein,
we studied the absorption of H<sub>2</sub>S and CO<sub>2</sub> by
alkanolamine–protic ionic liquids binary mixtures
based on 2-hydroxyethylammonium (MEA) or triethanolammonium cations
and residues of 2-hydroxy-5-sulfobenzoic acid or pyridine-3-carboxylic
acid at various temperatures and partial gases pressures. It was found
that absorbents based on the 2-hydroxyethylammonium cation, performed
high absorption properties toward the H<sub>2</sub>S. The solubility
of hydrogen sulfide, characterized by the Henry’s Law constant,
in MEA-based binary mixtures had the values comparable to the commercially
available ionic liquids. The results of thermal desorption analysis
demonstrated that the capture of acid gases in MEA-based absorbents
occurred at two stages: through the dissolution in MEA component and
in protic ionic liquid