Thermophysical properties play an important role in all industrial processes and are addressed in research projects both at RUB, SINTEF Energy Research and the Norwegian University of Science and Technology (NTNU). For accurate viscosity measurements of binary (H2 + CO2) and (H2 + CH4) mixtures, an international cooperation has been initiated between a current project carried out in the thermodynamic laboratory of RUB, funded by the Fraunhofer High Performance Center DYNAFLEX, and a project at SINTEF and NTNU, which is part of the framework of the Norwegian CCS Center (NCCS). As part of this cooperation, measurements are carried out by Benjamin Betken (RUB) and Bahareh Khosravi (NTNU), who is currently at RUB for a four months research stay.