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Subagyono, R.R. Dirgarini
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Chemistry

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STUDY KINETIC PYROLYSIS OF ULIN WOOD POWDER USING THERMOGRAVIMETRIC ANALYSIS Adha, Dhea Nur; Subagyono, R.R. Dirgarini; Gunawan, Rahmat
PROSIDING SEMINAR KIMIA Vol 2 No 1 (2023): Prosiding SNK 2023
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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A kinetic study of ironwood powder pyrolysis using thermogravimetric analysis has been conducted. This study aims to determine the thermal decomposition process and determine the activation energy value of ironwood powder pyrolysis using the free Kissinger-Akahira-Sunose (KAS) and Friedman models. Pyrolysis in this study used heating rates of 10, 15, 20, and 25 ºC/minute. The active temperature range of ironwood powder pyrolysis was 130.88 – 552.21ºC. The thermal decomposition process occurred in three stages, namely 1. evaporation of water or moisture, 2. active pyrolysis for the decomposition of hemicellulose, cellulose and lignin compounds, and 3. passive pyrolysis caused by gasification and the formation of non-volatile carbon compounds which evaporate to form CO and CO2 gases at high temperatures. The average activation energy of the pyrolysis of ironwood powder using the Kissinger-Akahira-Sunose (KAS) and Friedman methods were 137.34 ± 30.05 kJ/mol and 147.83 ± 36.66 kJ/mol, respectively. Keywords: Kinetic Study, Iron Wood Powder, Thermogravimetric Analysis
A KINETIC STUDY OF PYROLYSIS OF BAGASSE USING THERMOGRAVIMETRIC ANALYSIS Rachmawanti, Octaviana; Subagyono, R.R. Dirgarini; Allo, Veliyana Londong
PROSIDING SEMINAR KIMIA Vol 2 No 1 (2023): Prosiding SNK 2023
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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A kinetic study of pyrolysis of bagasse using thermogravimetric analysis using the model-free methods, including the Kissinger-Akahira-Sunose (KAS) method and the Friedman method, has been carried out. The purpose of this study was to determine the pyrolysis decomposition process of bagasse and to determine the activation energy value of pyrolysis of bagasse. In this study, pyrolysis was carried out at various heating rates of 10, 15, 20, and 25 °C/minute using a Thermogravimetric Analyzer (TGA). The active pyrolysis temperature range of bagasse was + 104-431°C with a mass reduction of 56-64% where the decomposition process of cellulose, hemicellulose, and lignin in the biomass sample occurred. The activation energy obtained based on the KAS was 136.39 + 23.19 kJ/mol, wheres the activation energy obtained based on the Friedman method was 156.19 + 35.28 kJ/mol. Keywords: Bagasse, Pyrolysis, Thermogravimetry, Model-free, Activation Energy
Co-Authors Adha, Dhea Nur Allo, Veliyana Londong Rachmawanti, Octaviana RAHMAT GUNAWAN