MODELING OF ACID GASES ABSORPTION COLUMN USING ALKANOLAMINE SOLUTIONS
VINEL D. J., BOUALLOU CHAKIB* CENTRE ÉNERGÉTIQUE ET PROCÉDÉS, ECOLE NATIONALE SUPÉRIEURE DES MINES DE PARIS, 60, BD. SAINT-MICHEL, 75006 PARIS, FRANCE, *CHAKIB.BOUALLOU@ENSMP.FR
This work is devoted to the improvement of acid gases removal process by alkanolamine solutions, especially DiEthanolAmine (DEA) and MethylDiEthanolAmine (MDEA). A new rigorous model treating reactive absorption based on modified two-film theory is developed as a first step. This model uses Nernst-Planck equations for the liquid film and Stefan-Maxwell equations for the gas film. The program was developed to handle either kinetically controlled or instantaneous chemical reactions in the liquid film. In a second step, the model is introduced within a simulator of industrial column; the new numerical tool thus developed makes it possible to represent successfully the cases of industrial absorption columns in term of absorption rates and enhancement factors.
