Recent studies have been conducted of thermal degradation of pure cellulose microfibrils with no content of hemicelluloses, pectins and lignin informed by TGA and dTGA measurements under nitrogen gas the maximum of thermal degradation at 370 °C, but the complete thermal event starts at 250 finishing at 380 °C with 16 wt % of residual mass after 450 °C . While a study by TGA and dTGA of the same cellulose powder used in this work under the same heating rate shows its maximum thermal degradation at 317 °C, but the complete thermal event takes also from 270 to 340 °C with a residual mass of 4 wt % after 420 °C .