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Designing Absorption Processes with Aqueous Diglycolamine
Author(s) -
Dixit Onkar,
Mollekopf Norbert
Publication year - 2014
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201400085
Subject(s) - molality , chemistry , surface tension , desorption , aqueous solution , solvent , absorption (acoustics) , viscosity , solubility , flue gas , chromatography , analytical chemistry (journal) , thermodynamics , adsorption , organic chemistry , materials science , composite material , physics
2‐(2‐Aminoexthoxy)ethanol or diglycolamine (DGA) is a CO 2 absorption solvent that is suitable to treat natural gas, flue gas, and biogas or landfill gas. Equilibrium CO 2 solubility in concentrated aqueous DGA solvents with varying molality was measured under absorption and desorption conditions at different temperatures. Viscosity and surface tension of the solvent before absorption, after absorption, and after desorption were determined. With increasing DGA molality, CO 2 loading remained constant until the number of moles of DGA exceeded the number of moles of water. For a given DGA molality, with higher CO 2 loading, viscosity increased exponentially and surface tension rose with a power of two.