Technical assessment of CO₂ capture using alkanolamines solutions

The most promising technology for carbon dioxide removal from coal and natural gas fired power plant flue gases at large scale applications is based on gas - liquid absorption. This paper evaluates the carbon dioxide absorption at low CO₂ partial pressures from flue gases by postcombustion using aqueous solution of alkanolamines e.g., monoethanolamine, diethanolamine, triethanolamine, methyldiethanolamine and diisopropanolamine. The aim of the present paper is to evaluate and compare the energy penalty involved by carbon capture technology using alkanolamines through the following technical coefficients: power consumption, heating agent and cooling agent consumptions. The CO₂ absorption modelling and simulation work described in this paper was developed in ChemCAD software.