Thermogravimetric analysis of high-density cork granules using isoconversional methods

In the present work thermogravimetric techniques were used to study thermal degradation of high-density cork granules. Pyrolysis experiments carried out for four heating ramps (10, 15, 20 and 25 °C.min?1), using nitrogen as carrier gas. From differential (DTG) curves it was seen that mainly occurs from 220 °C 525 main components (suberin, lignin, cellulose, hemicellulose). It also observed temperatures higher than up 900 °C, lignin continued decompose. Activation energies calculated data obtained two isoconversional methods Kissinger–Akahira–Sunose (KAS) Flynn–Wall–Ozawa (FWO). For KAS method, degrees conversion between 0.10 0.85, activation varied 232.2 353.0 kJ.mol?1. Using FWO method same conversion, in range 230.0 346.6 These values agree with provided by other authors, different lignocellulosic biomass.