Comprehensive reaction kinetics model of <scp>CO₂</scp> absorption into 1‐dimethylamino‐2‐propanol solution

Abstract

Abstract In the present work, the kinetics of the reactive absorption of CO 2 in 1‐dimethylamino‐2‐propanol (1DMA2P) solution were experimentally measured using a laminar jet absorber over a temperature range of 298–313 K, 1DMA2P concentration range of 0.5–2.0 mol/L, and CO 2 loading range of 0–0.06 mol CO 2 /mol amine. The measured kinetics data were then used to develop a comprehensive numerical kinetics model using a FEM‐based COMSOL software. The reaction rate model of the CO 2 absorption into 1DMA2P solution were then validated by comparing model rates with the experimental rates. An excellent agreement of model data with experimental data was achieved with an absolute average deviation (AAD) of 6.5%. In addition, vapor–liquid equilibrium plots of all ions in the 1DMA2P‐H 2 O‐CO 2 system were also developed. Further, this work has provided an effective criterion for evaluating CO 2 absorption, that can be used for both the conventional amines and alternative amines for the purpose of providing guidelines or information on how to effectively screen solvents.