In Chapter 6 we introduced stoichiometry as the concept that atomic species are neither created nor destroyed by chemical reactions, and this concept was stated explicitly by Axiom II. In Chapters 7 and 8 we applied Axioms I and II to the analysis of systems with reactors, separators, and recycle streams. The pivot theorem (see Sec. 6.4) is an essential part of the analysis of chemical reactors; however, the design of chemical reactors requires that the size be determined. To design a chemical reactor1, we need information about the rates of chemical reaction in terms of the concentration of the reacting species. In this chapter we introduce students to this process with a study of chemical kinetic rate equations and mass action kinetics 2.
- 9.3: Mechanistic Matrix
- In this section we explore in more detail the reaction rates associated with chemical kinetic schemata of the type studied in the previous two sections. The mechanistic matrix will be introduced as a convenient method of organizing information about reaction rates and is different than the pivot matrix. We need to be very clear about the similarities and differences between these two matrices, both of which contain coefficients that are often referred to as stoichiometric coefficients.