1. Enhanced Mass Transfer: The customizability of 3D printed reactors allows for designs that facilitate better mass transfer, reducing diffusion limitations. 2. Optimized Flow Dynamics: By designing reactors with specific flow channels and patterns, the distribution of reactants can be optimized, leading to improved reaction kinetics. 3. Increased Surface Area: The ability to create intricate geometries increases the surface area available for catalytic reactions, thus boosting the overall reaction rate.