SIMULATION AND PARAMETER SENSITIVITY ANALYSIS OF ACID GAS-ABSORPTION INTO MIXED ALKANOLAMINE SOLUTIONS

A calculation model has been developed to numerically interpret the si multaneous mass transfer behaviour occurring in the absorption of CO2 and H2S into blended alkanolamines. The film theory and approximate fi lm theory models are used to describe the mass transfer phenomena with in the liquid phase, while gas phase resistance is neglected. Two dist inctly different simulation modules have been developed: a classic rep resentation of the reaction kinetics coupled with a simple Debye-Hucke l representation of the thermodynamics, and the recent zwitterion mech anism coupled with the Deshmukh-Mather thermodynamic model. The object ive of our work is to identify the key parameters of the system, via a parameter sensitivity analysis, to allow for process optimisation by parameter identification. Some parameters included in the study are: k inetics, equilibrium, thermodynamics, fluid hydrodynamics, temperature , etc..