Original scientific paper
https://doi.org/10.13044/j.sdewes.d12.0493
Investigating Kinetic and Thermodynamic Parameters in the Pyrolysis of Sheep Manure Using Thermogravimetric Analysis
Ahmad Indra Siswantara
; Universitas Indonesia, Depok, Indonesia
Illa Rizianiza
; Universitas Indonesia, Depok, Indonesia
Diyas Prawara Mahdi
; Universitas Indonesia, Depok, Indonesia
Tanwir Ahmad Farhan
; Universitas Indonesia, Depok, Indonesia
Candra Damis Widiawati
; Politeknik Negeri Jakarta, Depok, Indonesia
Muhamad Hilman Gumelar Syafei
; Universitas Indonesia, Depok, Indonesia
Adi Syuriadi
; Universitas Indonesia, Depok, Indonesia
Abstract
The kinetics of the pyrolysis process of sheep manure were investigated using Thermogravimetric Analysis in this work. It was heated at 30°C to 900°C with a heating rate of 10°C/min. There are two stages of mass degradation, namely dehydration and devolatilization. The temperature dehydration stage is 30°C–140°C while the devolatilization stage is 210°C–900°C. However, at temperatures >500°C, mass degradation decreases until it reaches 900°C. This indicates that most of the volatile matter has disappeared at this temperature. The devolatilization stage includes the decomposition of hemicellulose and cellulose (210°C–900°C) and lignin (>590°C). The calculated activation energy from Friedman's non-conversional method is 21.32 kJ/mol and Coast-Redfern is 26,20 kJ/mol, while the frequency factor value is 9.94.1018 s-1 for Friedman and 3.42.1018 for Coast-Redfern Method which indicates that the pyrolysis process of sheep manure is a complicated phenomenon. The estimated activation energy value is then used to calculate thermodynamic properties e.g., Gibbs free energy, enthalpy, and entropy.
Keywords
Pyrolysis; Sheep manure; Thermogravimetic; Kinetic; Friedman
Hrčak ID:
327791
URI
Publication date:
18.5.2026.
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