Sukarni Sukarni, Agus Andika Putra, Ardianto Prasetiyo, Yahya Zakaria, Ahmad Yusril Aminullah, Avita Ayu Permanasari, Poppy Puspitasari
Coconut, as an evergreen plant, grows abundantly and generates coconut shell waste (CSW) as a by-product, often mistreated when it can be used as a renewable energy source. This research aims to study the kinetics of CSW combustion through thermogravimetric analysis (TGA). The sample was combusted from a temperature of around 27℃ to 1000 ° C at a constant heating rate of 30 ° C min-1 and an airflow rate of 100 ml min-1. The thermogravimetric (TG) and derivative thermogravimetric (DTG) curves show that the thermal decomposition of the CSW existed in three phases: from room temperature to 135 ° C occurred the release of moisture content, followed by a phase of active combustion in which cellulose and hemicellulose were decomposed and burned, and finally after the temperature of 550℃ was the solid residue decomposition occurred. The combustion kinetic parameters of CSW were evaluated using Horowitz-Metzger’s integral method. The moisture content release phase possessed a lower activation energy value (80.99 kJ mol-1) compared to the main phase of the biomass combustion of CSW (127.80 kJ mol-1). Thermodynamic parameters were investigated as well, and it was revealed that a certain amount of heat was needed to decompose the CSW sample into an activated complex throughout the combustion reaction. © 2024 American Institute of Physics Inc.. All rights reserved.
Center for Renewable Fuels Research (CRFR), Department of Mechanical and Industrial Engineering, Universitas Negeri Malang, Jl. Semarang No 5, Malang, 65145, Indonesia; Center of Advanced Materials for Renewable Energy (CAMRY), Universitas Negeri Malang, Jl. Semarang No 5, Malang, 65145, Indonesia