The group “Sustainable, clean and bioenergy systems”, in the Institute of Thermal Engineering at the Graz University of Technology (Austria), conducts experimental and numerical research on thermo-chemical biomass conversion and its integration into renewable bioenergy and biorefinery concepts. Investigations are focused on the development of novel bioenergy systems and the main thermo-chemical conversion processes: combustion, gasification and pyrolysis; addressing producer gas conditioning and utilization as well as the reduction in emissions of air pollutants, which damage our health and the environment. The group is a key scientific partner of the Austrian biomass competence centre BIOENERGY 2020+ and has a close collaboration with national and international research groups and industrial partners in the bioenergy sector.