aqueous solutions of alkanolamines are the highly popular absorbents used in the gas processsing industry industrially important alkanolamines for co2 removal highlighted by kohl and nielsen (3) are the primary amine monoethanolamine (mea) the secondary amine diethanolamine (dea) and the tertiary amine methyldiethanolamine (mdea) primary and secondary alkanolamines react react rapidly with co2 to form carbamates however the heat of absorption