Open cell foams find application in several fields, such as heat exchangers or deep bed filters. However, there is a growing interest for their application as catalyst supports due to high porosity, specific surface area and open structure leading to good mass and heat transfer properties. Various materials (ceramic, metal, carbon) and pore structures can be produced, enabling a broad range of hydrodynamic, mechanical and thermodynamical properties. In this work, new reactor types for gas-liquid-solid reactions are developed. Currently these reactions, such as hydrogenation or oxidation of chemicals, are often performed using slurries of fine catalyst particles. They are dispersed in the liquid and need to be separated from the mixture after reaction. The idea of this work is to immobilize the catalyst on porous structures, which are integrated parts of the reactor, such as rotating beds or stirrer blades. This allows an easy separation of catalyst from the reaction mixture. In addition to the role as catalyst supports, the rotation of the foams should provide shear forces to break up gas bubbles and lead to a mixing of reactants. A lab scale three phase reactor will be constructed allowing the integration of different foam structures and measurements in order to investigate the hydrodynamics of the system. The dependence of mixing and bubble behavior, gas-liquid-solid mass transfer on various parameters, such as stirring rate, liquid viscosity, foam structure and geometry, are studied and described by engineering-type correlations. The reactor performance using a model reaction is investigated, where especially the application for batch processes in fine and pharmaceutical chemistry is studied.