Kinetic Modeling of Scrap Tire Pyrolysis

Abstract

In this paper we have studied the kinetics of the thermal decomposition of scrap tire using nonisothermal thermogravimetric methods. Experiments were carried out over the temperature range of 20-600 °C at different heating rates and with various powder sizes. Under the conditions studied, the heating rate has a significant effect on the pyrolysis process while the powder size has little effect on it. The results indicated that the pyrolysis process of tire powder consisted of three stages which are related to the degradation of different tire materials. Two models were developed to simulate this pyrolysis process and to determine the kinetic and process parameters. The predictions by the two models agree well with experimental data.

Pyrolysis of waste tyres – The effect of reaction kinetics on the results of thermogravimetric analysis

“…3). Although both of the compared samples differ significantly in mass and size (Leung and Wang, 1999). Note that their biggest tyre samples had similar dimensions to our samples from measurements No.…”

“…This aspect will be discussed in the further part of this work. In kinetic modeling of ELT pyrolysis the TCSM was used (Galvagno et al, 2007;Leung and Wang, 1999). This model is based on two key assumptions: (1) car tyres consist of three major components, (2) thermal decomposition of each component takes place independently.…”

“…Frequently, kinetic modeling relies on deconvolution of the DTG curve and determination of kinetic parameters for individual components. This approach was applied in two different kinetic models proposed by Leung and Wang (Leung and Wang, 1999): Three-Component Simulation Model (TCSM) and Three-Elastomer Simulation Model (TESM). The TCSM assumes that the kinetics of ELT pyrolysis can be modeled using three major components which decompose independently.…”

“…The TESM assumes that the kinetics of ELTs pyrolysis can be modeled using the three elastomers NR, SBR and BR together with their respective oil components (six components in total). Many researchers (Al-Salem et al, 2009;Galvagno et al, 2007;González et al, 2001;Lah et al, 2013;Mui et al, 2010;Seidelt et al, 2006;Quek and Balasubramanian, 2009) have dealt with the kinetic modeling of ELTs pyrolysis after Leung and Wang (1999). The details can be found in an excellent review by Quek and Balasubramanian (2012).…”

Thermal Decomposition Behavior Study of Two Agricultural Solid Wastes for Production of Bio-Fuels by Pyrolysis Technology

“…Many research groups (Williams and Besler, 1993;Kim et al, 1995;Islam et al, 2009;Leung and Wang, 1998) assumed that devolatilization in the kinetic analysis of DTG data was a first-order reaction for waste materials. To determine the apparent kinetic parameters, which are useful for engineering purposes, a two-stage first-order reaction (excluding moisture evolution) is assumed in this study.…”