Konstantinos G. Kalogiannis is Assistant Professor in the Department of Chemical Engineering of the University of Western Macedonia (UOWM). He is author or co-author of more than 50 research publications in Peer Reviewed International Journals (over 3600 citations in Scopus, Hirsch (h)-index= 31) and 150 publication in national and international conferences. His research interests are focused on the fields of:

• Catalytic pyrolysis of biomass and organic solid wastes toward biofuels and renewable chemicals of high added value.
• Wastes valorisation for fuels and chemicals via thermochemical processes (end of life tires, plastic wastes).
• Biomass fractionation and conversion to transportation fuels, fine chemicals and food additives.
• Catalytic reaction engineering, design of novel processes and experimental units.
• Biorefineries and novel bio-based materials.
• Technoeconomical assessment of chemical processes and industrial plants.

Dr. Georgios Varvoutis is a graduate from the Department of Chemical Engineering at the Aristotle University of Thessaloniki. His Ph.D. thesis involved the development and assessment of novel CeO₂-based catalytic materials for the lab and scaled-up CO₂ hydrogenation process using renewable H₂. Currently, he is a post-doctoral researcher in the Department of Mechanical Engineering of the University of Western Macedonia (UoWM), involved in the catalytic production of light olefins from CO₂ hydrogenation. He is author or co-author of more than 20 research publications in peer-reviewed International Journals (over 190 citations in Scopus, with an Hirsch (h)-index = 6) and 29 publications in national and international conferences. His research interests are focused on the fields of:

• Catalytic CO₂ hydrogenation using green H2 toward renewable chemicals of high added value.
• Biomass pyrolysis and gasification and conversion to fuels and bio-oil.
• Wastes valorization for fuels and electricity generation via thermochemical processes (e.g., biogas, sewage sludge).
• Catalytic reaction engineering, design of novel processes and experimental units.
• Techno-economic assessment of chemical processes and industrial plants using Aspen Plus, System Advisor Model and nPro software.

Dr. Lampropoulos Athanasios is a graduate of the Department of Mechanical Engineering at the University of Thessaly. He holds two master's degrees in water resources management and environmental technologies from Aristotle University of Thessaloniki and Democritus University of Thrace His Ph.D. thesis involved the lab-scale investigation of the catalytic thermochemical conversion of solid fuels towards syngas generation and scaled-up gasification process in pilot and commercial units. Currently, he is a post-doctoral researcher in the Department of Mechanical Engineering of the University of Western Macedonia (UoWM), involved in the catalytic production of light olefins from CO₂ hydrogenation. He is author or co-author of more than 15 research publications in peer-reviewed International Journals (over 80 citations in Scopus, with an Hirsch (h)-index = 4) and more than 25 publications in national and international conferences. His research interests are focused on the fields of:

• Biomass pyrolysis and gasification and conversion to fuels and bio-oil.
• Catalytic CO₂ hydrogenation using green H₂ toward renewable chemicals of high added value.
• Wastes valorization for fuels and electricity generation via thermochemical processes (e.g., biogas, sewage sludge).
• Catalytic reaction engineering, design of novel processes and experimental units.
• Techno-economic assessment of chemical processes and industrial plants using Aspen Plus, System Advisor Model and nPro software.