Online evolved gas analysis by Thermogravimetric-Mass Spectroscopy for thermal decomposition of biomass and its components under different atmospheres: Part I. Lignin

► The first mass loss stage was not significantly influenced by oxidative atmospheres. ► Gas evolution profiles were in accordance with the DTG curves. ► Ratio of CO/CO2 at the second evolution peak was declined with oxygen concentration. ► The second mass loss stage under CO2 gave a high activation energy of 514.9 kJ/mol.