Advice on how to automatically modify the stoichiometry of chemical equation

Hello, if I want to automatically modify the stoichiometry of chemical equation in the reactor as the reactant inlet flow changes, may I ask if you have any method to achieve this purpose. Thanks for your help.

I set wt as the basis of the reaction, and did not set correct_atomic_balance. Because the reactant is cellulose, the correct_atomic_balance was not set. The stoichiometry of chemical equation was set according to the actual generated amount.