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 °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 E a obtained by the FWO and KAS methods. A kinetic compensation effect, represented by the equation lgA = −1.3515 + 0.0808E a can be observed.