HYDROLYZED LIGNIN – A HIGH-CALORIE FUEL AND EASILY AVAILABLE RENEWABLE RAW MATERIAL FOR THE PRODUCTION OF FUEL PELLETS AND BRIQUETTES - Obodovych, O.M.; Stepanova, O.E.; Rezakova, T.A.; Chernyavskiy, K.Ye.; Parchenko, V.M. (Thermophysics and Thermal Power Engineering, 2025)