Marek Pronobis is an expert in boilers and auxiliary equipment, novel heating surfaces, boiler modernisation, fuel flexibility, and low-NOx combustion in fossil and renewable fuels. He has conducted research on fouling and formation of ash deposits in boilers, erosion and corrosion processes in boilers, grinding and drying processes in solid fuel preparation installations, aluminosilicate additives improving boiler operation, and SCR and SNCR technology. He has published over 230 publications in scientific journals and conference proceedings.