Several challenges arise in managing fluid flow in catalytic reactors: - Pressure Drop: High fluid velocities can lead to increased pressure drop across the reactor, which can affect the overall process efficiency and increase operational costs. - Flow Distribution: Ensuring uniform flow distribution is crucial, especially in large-scale reactors. Uneven flow can result in poor catalyst utilization and lower conversion rates. - Fouling and Clogging: Over time, impurities in the fluid can cause fouling or clogging of the catalytic bed, affecting fluid flow and the overall reaction kinetics.