Component Reaction Rates for Multiple Reactions

The component balance for a batch reactor. Equation (1.21), still holds when there are multiple reactions. However, the net rate of formation of the component may be due to several different reactions. Thus, 

we envision component A being formed by Reactions I, II, III. each of which has a stoichiometric coefficient with respect to the component. Equivalent to Equation (2.7) we can write 

Example 2.1 Determine the overall reaction rate for each component in the following set of reactions  

Solution We begin with the stoichiometric coefficients for each component for each reaction  

The various reactions are all elementary (witness the rate constants over the arrows) so the rates are 

A byproduct is something made in the course of making something else. The term is neuAal, not pejoraAve, because byproducts can be valuable. A classic example in the chemical industry is the chlorination of benzene to produce monochlorobenzene  

In this reaction, HCl is a stoichiometrically determined byproduct. For every mole of monochlorobenzene, there will be 1 mol of HCl. This mole of HCl cannot be avoided without changing the reaction. Depending on circumstances, HCl can be valuable or 

---