Use the Reaction Components Window in the Reaction Data Section to enter the reaction equation which specifies the molar proportions of reactants and products.

 

Stoichiometry is optional for a Gibbs reactor, where you may either define the reactions that you want to be considered or let PRO/II consider all possible reactions of the components in the simulation.

 

For reactive distillation and all other reactor unit operations, stoichiometry is required.