Kinetics of pyrolysis of ramie fabric wastes from thermogravimetric data

The reutilization of the ramie-based textile waste or scraps from textile production through pyrolysis is a promising route for producing bio-fuels. In this work, the thermal behaviors and pyrolysis kinetic of used ramie fabric were investigated using thermogravimetric analysis at different heating rates of 5, 10, 20, and 40 degrees C min(-1) under nitrogen conditions. Three model-free methods, the isoconversional Kissinger, Kissinger-Akahira-Sunose (KAS) and Flynn-Wall-Ozawa (FWO) models and Coats-Redfern model-fitting method were employed to identify the kinetic triple including activation energy, pre-exponential factor, and reaction model. It was established that the Coats-Redfern model-fitting method was suspectable for determining the kinetic reaction mechanism but the most probable reaction R (R2 or R3) function can be evaluated on the basis of the activation energy value which is nearest to the value of Ea obtained by the FWO and KAS methods. A kinetic compensation effect, represented by the equation lgA = -1.3515 + 0.0808E(a) can be observed.