Exergy in chemical reactions of combustion and gasification part 1: theoretical approach

Abstract

The exergy concept applied to chemical reactions of combustion and gasification has been presented and discussed in detail. Especially the building of thermodynamic effectivity quotients has been emphasized. Different cases have been presented: for stoichiometric homogeneous, stoichio-metric heterogeneous, simultaneous and non–stoichiometric chemical reactions the special approach was pointed out. Thus, the special procedure of partition exergy changes into vanishing and created exergies (i.e. thermodynamic expenditures and advantages in a process) could be presented. Such an approach makes it possible regarding chemical reactions of combustion and gasification in thermo-dynamic models of modern power engineering systems, in which these processes have been taken into account only in their simplified form.