We lowered the amount of water used in the solvent to 50% or less and examined the physical characteristics of quasi-aqueous and nonaqueous sorbents "using an organic solvent with a high Specific heat, instead of water. The physical solubility, diffusivity, and CO2 absorption rate were Measured as a function of temperature (293, 303, 313, and 323 K) and sorbent (monoethanolamine, MEA/H2O; qUasi-aqueons MEA/H2O/ethylene glycol; nonaqueous MEA/ethylene glycol): Results show that the rate of CO, absorption by the nonaqueous sorbent increases with temperature and ethylene glycol content. Rate constants for CO2 absorption by the sorbents were evaluated based on the physical data and absorption rate. The reaction rate constants of the water-based, quasi-aqueous, and nonaqueous Sorbents were determined to be similar to 698, similar to 1518, and similar to 1780 m(3) kmol(-1) S-1, respectively. Furthermore, the,CO2 absorption-regeneration efficiency and CO, loading amount were-evaluated during continuous CO2 absorption and sorbent regeneration.