Fossil resources depletion and global warming are two major concerns in our society, therefore we need to find alternative and viable routes for the synthesis of commodity chemicals in order to satisfy the current steady demand growth. Bio-based furanic compounds can be obtained with high yields from dehydration of cellulose and hemicellulose (two of the main components in biomass) under pyrolysis conditions. Nowadays, hydroxymethylfurfural, methylfuran and dimethylfuran are used to obtain mono-aromatics by using solid acidic materials as catalysts however, it is known that these sort of reactions suffers from rapid catalyst deactivation. Within this project, we will investigate the production of BTX from bio-based furanic compounds by means of Operando UV-Vis. With this approach, we want to elucidate the main deactivation pathways by identifying the responsible species for that deactivation.