Thermal decomposition characteristics and study of the reaction kinetics of tea-waste

Abstract This study aimed to investigate waste-tea’s pyrolysis kinetics and thermodynamics assess its potential for thermochemical processes. In this study, three primary samples of tea-waste are prepared investigation: raw, torrefied at 200 °C, 600 °C. Under a nitrogen environment, thermogravimetric analyses (TGA) were conducted seven heating rates (10, 15, 20, 25, 30, 35, 40 °C/min) the effect on kinetic parameters temperatures ranging from 27 1000 Using was beneficial take advantage multiple techniques alongside single rate techniques. These combined, forming four groups (HRG). The determined using two model-fit-methods, direct Arrhenius Coats-Redfern methods, model-free Flynn-Wall-Ozawa (FWO) Kissinger-Akahira-Sunose (KAS) methods. Thermodynamic data comprising Δ H , G S addressed. X-ray fluorescence (XRF) Fourier transform infrared (FTIR) spectrum used presence natural minerals in tea-waste. results indicated that material has produce syngas. torrefaction process °C shows 53% increase energy content compared raw biomass. is shown be more reliable than method. activation ( E ) witnesses rising with β = 55.27 kJ mol −1 10 min 60.04 For approaches, minimum values 82 kJ/mol FWO 78 KAS, whereas peak 420 KAS 411 FWO. A comparison method case HRG1 maximum average value. resulting HRG1, HRG2, HRG3, HRG4 269 kJ/mol, 145 174 202 respectively.