Several models are used to describe RTD, each with its assumptions and applications:
1. Plug Flow Model: Assumes that all elements of the fluid move through the reactor at the same velocity, resulting in a uniform residence time. 2. CSTR (Continuous Stirred Tank Reactor) Model: Assumes that the contents of the reactor are perfectly mixed, leading to an exponential distribution of residence times. 3. Dispersion Model: Accounts for deviations from ideal plug flow due to molecular diffusion and other dispersive effects. 4. Tanks-in-Series Model: Represents the reactor as a series of perfectly mixed tanks, providing a more realistic approximation for certain systems.
