Catalysis is defined as the increase of the rate of the reaction or directing the reaction to one of the thermodynamically permitted pathways that lead to different products. It has been estimated that over 80% of chemical processes in the industry use this chemical phenomenon at least at one step of the production process. Due to the importance of catalysis a large number of studies of its principles have been undertaken, but still little is known about the kinetics of liquid phase heterogeneous catalytic reactions. The aim of our research is to develop a tool that will ensure a full description of in situ reaction,i.e. the reaction mechanisms and mass transport of the reagents within the catalyst pores. This will be achieved by combining time-resolved neutron diffraction and 13C-NMR, which will monitor structural and compositional changes during the course of the reaction, respectively