In the context of catalysis, nanofiltration can be used to separate reactants, products, and catalysts efficiently. This process is crucial in catalytic reactions where the separation of different species can determine the efficiency and feasibility of the reaction. For instance, in heterogeneous catalysis, NF membranes can be employed to retain catalyst particles while allowing smaller molecules to pass through. This not only improves the reaction kinetics but also facilitates the recycling of catalysts, thereby reducing costs and environmental impact.