SOLUBILITY OF CARBON-DIOXIDE IN AQUEOUS MIXTURES OF MONOETHANOLAMINE WITH METHYLDIETHANOLAMINE

Solubility data of carbon dioxide in aqueous mixtures of monoethanolamine (MEA) with methyldiethanolamine (MDEA) have been measured at 40, 60, 80, and 100-degrees-C and at partial pressures of carbon dioxide between 1.0 and 2000 kPa. The mixtures of alkanolamines studied are 30 wt % MDEA, 12 wt % MEA + 18 wt % MDEA, 24 wt % MEA + 6 wt % MDEA, and 30 wt % MEA aqueous solutions. The solubility of carbon dioxide in aqueous solutions are reported as functions of partial pressures of carbon dioxide at the temperatures studied.