Combustion performance and kinetic modeling of lignite blended with torrefied biomass of different originCombustion performance and kinetic modeling of lignite blended with torrefied biomass of different origin Peer-Reviewed Journal Publication Δημοσίευση σε Περιοδικό με Κριτές 2023-05-022022enBiomass materials of different origin were upgraded by torrefaction and blended with lignite. Combustion characteristics, reactivity, and synergistic effects were determined through thermal analysis tests. An independent parallel reactions model was developed to describe combustion kinetics. According to the results, torrefaction delayed ignition and reduced the reactivity of biomass fuels. Blending of lignite with either raw or torrefied materials exhibited some synergy and improved the reactivity of lignite up to two times/fold. The model applied fitted the experimental results accurately. The kinetic parameters of lignite/torrefied biomass blends were closer to the values corresponding to lignite (ΔΕl = 74–235 kJ/mol, ΔΕl/t biomass = 80–223 kJ/mol), pointing to a higher similarity in mechanism of combustion and thermal behavior.http://creativecommons.org/licenses/by/4.0/International Journal of Green Energy19111221-1229 Vamvouka Despoina Βαμβουκα Δεσποινα Diamantaki Maria Διαμαντακη Μαρια Sfakiotakis Stylianos Σφακιωτακης Στυλιανος Taylor & Francis Co-combustion Biomass Lignite Torrefaction Kinetics