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

Abstract

Employing experimental kinetics data collected in this study, a power law rate equation for the thermal degradation of 1-amino-2-propanol (A2P) and 2-amino-2-methyl-1-propanol (AMP) in CO2-loaded blended solutions are investigated. The rate experiments were carried out at 120, 135 and 150 °C to accelerate thermal degradation. Kinetic data was collected to extract the initial rate equation from aqueous 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, molCO2/molAMP+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.