Thermal Degradation Rate and Kinetic Modeling of CO₂-Loaded Amine Solvent Blends of 2-Amino-2-methyl-1-propanol and 1-Amino-2-propanol

Power-law rate equations for the thermal degradation of 1-amino-2-propanol (A2P) and 2-amino-2-methyl-1-propanol (AMP) in CO₂-loaded blended solutions are determined with the experimental kinetic data collected in this study. The rate experiments were conducted at 120, 135, and 150 °C to accelerate thermal degradation. The kinetic data collected were used to obtain the initial rate equation from blended solutions of 0.0, 0.5, 1.5, 2.0, 2.5, and 3.5 M, AMP and A2P with CO₂ loadings from 0.1 to 0.6, mol_CO2 /mol_AMP+A2P. The power-law rate equations for each amine in the solutions, along with pre-exponential factors and activation energies for each reaction are provided. For both AMP and A2P degradation, the activation energies for the reaction between AMP, A2P, and CO₂ presented lower values, while the pre-exponential factors were orders of magnitude higher. The presence of the second amine in these solutions has little impact on the degradation rate of the individual amines.