(244d) CO2 Absorption in an Aqueous Amine with a Physical Co-Solvent: Electrolyte NRTL and Rate-Based Process Model and Pilot Plant Experimental Validation.
AIChE Annual Meeting
Tuesday, November 9, 2021 - 8:25am to 8:50am
In this work we present the results of a rate-based AspenPlus process model for the CO2 capture using aqueous mixtures of N-methyl diethanolamine (MDEA) and a common physical co-solvent. We performed new Liquid-Vapor Equilibrium as well as new kinetic experiments and used the data to develop a new thermodynamic electrolyte e-NRTL model, as well as a new kinetic model, which have subsequently been implemented in the overall AspenPlus process model. In parallel we performed experiments on CO2 removal with the aqueous MDEA-co-solvent on our absorption-regeneration pilot in Lacq, to validate the results of the process simulations. The results of this work will be presented and the overall impact of adding a significant amount of physical co-solvent will be discussed.