CAPTURE DE CO2 EN CENTRALES AU CHARBON PULVERISE (CP): ETUDE DU PROCEDE A BASE DE CARBONATE DE POTASSIUM
AMANN J. M. 1, BOUALLOU CHAKIB 1*, DESCAMPS C. 1, KANNICHE M. 2 (1)CENTRE ĂNERGĂTIQUE ET PROCĂDĂS - ĂCOLE DES MINES DE PARIS, 60 BD SAINT MICHEL, 75006 PARIS, FRANCE (2)EDF, DIVISION RECHERCHE ET DĂVELOPPEMENT, DĂPARTEMENT SYSTĂMES DE PRODUCTION ET ENVIRONNEMENT, 6 QUAI WATIER, 78401 CHATOU CEDEX, FRANCE. *CORRESPONDA
The capture of CO2 in the power production systems is due to the desire of reduction of greenhouse producing gases. The present study deals with the separation of CO2 from flue gases of power plants through chemical absorption in potassium carbonate solutions. The flue gas composition (11.71 % moles CO2) corresponds to a 600 MWe power plant using pulverized coal as fuel and desulphurization. The CO2 absorption was simulated using Aspen Plusâą software. For estimating the physical properties of substances and mixtures, the thermodynamic model NRTL has been chosen. A parametric study revealed the influence of the solvent flow upon CO2 separation degree and reboiling heat demand, at different loading degrees. The study shows that reboiling heat demand is very high at separation degrees higher than 50%.