The determination of reactor volume depends on several factors, including the desired conversion, the reaction kinetics, and the type of reactor being used. For continuous stirred-tank reactors (CSTR), the volume can be calculated using the relation:
V = (F * τ) / X
where V is the reactor volume, F is the flow rate, τ is the residence time, and X is the conversion. For plug flow reactors (PFR), the volume is often determined by integrating the rate laws over the length of the reactor.