Pyrolysis of Tropical Hardwood under Long-term and Low-temperature Conditions

Chew, M, Hoang, N and Shi, L 2011, 'Pyrolysis of Tropical Hardwood under Long-term and Low-temperature Conditions', International Journal on Architectural Science, vol. 8, no. 1, pp. 17-27.

Document type: Journal Article
Collection: Journal Articles

Title Pyrolysis of Tropical Hardwood under Long-term and Low-temperature Conditions
Author(s) Chew, M
Hoang, N
Shi, L
Year 2011
Journal name International Journal on Architectural Science
Volume number 8
Issue number 1
Start page 17
End page 27
Total pages 11
Publisher Hong Kong Polytechnic University
Abstract Pyrolysis experiments were carried out on Kapur and Nyatoh hardwood species in ovens isothermally at low temperatures 160°C, 175°C and 190°C for extended durations up to 153 days in aerobic condition. Oxygen chemisorption and functionality of chars were analysed using thermogravimetric analysis (TGA) and Fourier transform infrared (FTIR) spectroscopy. Pyrolysis kinetic models for Nyatoh and Kapur wood under isothermal conditions in air were developed based on weight loss history. Thermal degradation of wood samples in the study followed a first-order reaction process after the initial period of fast degradation. The model can be used to estimate the heating period to reach different degrees of degradation under air condition as a function of temperature and to predict the duration to reach the final stage where self ignition is most likely at a particular low temperature. The study has shown that chars created at low temperature for long duration in aerobic condition were susceptible to oxygen chemisorption. Results indicated that they were reactive and prone to self ignition.
Subject Construction Materials
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