The project is focused on applied research and development of certified methodology of fast determination of long-term activity of hydrodesulfurization (HDS, hydrorefining) catalysts. The project relies on the experience of the applicant in catalyst activity testing and on the high demand for this kind of methodology not only among Czech, but also among foreign customers of the applicant. The current development of the HDS catalyst regeneration technologies results in increased demand for HDS catalysts testing. Thus, a consortium of two leading Czech R&D institution in the field of heterogeneous catalysis and chemical reaction engineering was established in order to develop quickly a certified technology thanks to which the applicant will strengthen its position on the market of long-term catalyst activity testing.