Premium
CO 2 Absorption into Aqueous Solutions of Monoethanolamine, Methyldiethanolamine, Piperazine and their Blends
Author(s) -
Dubois L.,
Thomas D.
Publication year - 2009
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.200800545
Subject(s) - piperazine , chemistry , aqueous solution , scrubber , mass transfer , flue gas , absorption (acoustics) , solvent , data scrubbing , alkanolamine , tertiary amine , amine gas treating , carbon dioxide , chemical engineering , organic chemistry , chromatography , materials science , waste management , engineering , composite material
The removal of carbon dioxide from industrial gases, e.g. in thermal power stations to meet the discharge limits for CO 2 in flue gases, is usually achieved with a reactive absorption technique using aqueous solutions of alkanolamines. From the absorption performance point of view, primary and secondary amines are preferred. However, in case the costs of the solvent regeneration are also taken into account, tertiary amines are much more attractive. In order to combine the specific advantages of tertiary and primary/secondary alkanolamines, both types of solvents are mixed. In this paper, mixtures of monoethanolamine and methyldiethanolamine with piperazine as absorption activator are experimentally compared with respect to CO 2 removal performances at 25 °C. The absorption process in a special packed column has also been simulated with the use of published data on reaction kinetics, physicochemical properties (densities, viscosities, diffusivities, Henry coefficients) of the CO 2 ‐amines systems, including experimentally determined hydrodynamic and mass transfer characteristics of the CO 2 scrubber.