Kinetic Pyrolysis of Some Herbaceous Biomasses- Two Kinds of Grasses

Abstract

Among herbaceous biomasses, several grasses are widely spread in lands and forests. In this study, the pyrolysis behaviour and kinetic analysis of two kinds of grasses including Cortaderia Selloana (CS) and Juncus inflexus L. (JIL) in nitrogen flow were studied by thermogravimetric analysis at four different heating rates 5, 10, 15 and 20 oC/min. Thermogravimetric analysis showed three distinct zones of thermal decomposition for both biomasses. Two model-free (isoconversional) methods, Kissinger-Akahira-Sunose (KAS) and Flinn-Wall-Ozawa (FWO) were used to determine the apparent activation energy. Activation energy average values were shown to be 296.29-290.69 kJ mol-1 for (CS) and 216.75-215.07 kJ mol-1 for (JIL) as calculated by KAS and FWO methods, respectively.