Thermodynamics of the CO2-absorption/desorption section in the integrated gasifying combined cycle - I. modeling

Abstract

The carbon dioxide absorption/desorption unit of the Integrated Gasifying Combined Cycle has been detailed described to formulate appropriate model equations for the processes, suitable for further thermodynamic analyzes. There are two principal technologies of the CO2–removing section, namely the absorption with the following expanding desorption process, and the absorption with the following classical plates (or packing) desorption one. The physics of thermodynamic properties of the water/carbon dioxide solution have been presented thoroughly using hitherto literature data. The Henry's Law has been emphasized as the base for further thermodynamic analyzes. The numerical results of appropriate absorption/desorption units have been compiled presuming fundamental relations, which are also presented. They should be the base for their thermodynamic analyzes.