Heat of absorption of carbon dioxide in mixtures of 2-amino-2-methyl-1-propanol and organic solvents

This paper presents experimental data on the heat of absorption of CO2 in solutions of 2-amino-2-methyl-1-propanol (AMP) and an organic solvent, either N-methyl-2-pyrrolidone or triethylene glycol dimethyl ether, at different amine concentrations (15 wt% and 25 wt%) and temperatures (25 °C and 50 °C). The heat of absorption was greatly affected by the formation of a precipitate, which was observed during some of the experiments, and was significantly lower at CO2 loadings above 0.5 mol CO2/mol AMP, as physical absorption of CO2 became the dominating absorption process.