Investigation of Combustion Kinetics of Five Waste Wood Samples with Thermogravimetric Analysis

2007-02-24
Yorulmaz, Sema Yurdakul
Atımtay, Aysel
In the present study, combustion mechanisms, thermal kinetics, and phases of combustion were investigated for untreated pine and treated MDF, plywood and particleboard samples. Waste wood samples were combusted in air at 10, 20 and 30 degrees C/min heating rates in TGA. As a result of TG analysis, thermal decomposition of treated samples was observed at lower temperatures as compared to the untreated pine sample because of the catalyzing effects of the chemicals in the samples. Therefore, there were less flammable products, lower weight losses in the main oxidation region, decrease in the max. weight loss temperatures and formation of more char for treated samples as compared to untreated pine sample. In other words, chemicals used during production of these samples lead to decrease in the combustibility of the treated samples. Thermal kinetic constants for the samples were calculated by using Coats Redfern and Broido Methods. In order to find out the mechanisms responsible for the oxidation of the waste wood samples, six solid state mechanisms of Coats Redfern Method were tested.

Suggestions

Investigation of combustion kinetics of treated and untreated waste wood samples with thermogravimetric analysis
Yorulmaz, Sema Yurdakul; Atımtay, Aysel (2009-07-01)
In the present study, combustion mechanisms, thermal kinetics, and phases of combustion were investigated for waste wood samples (untreated pine and treated MDF, plywood and particleboard). Waste wood samples were combusted in air at 10, 20 and 30 degrees C/min heating rates in TGA. The results of TG analysis have shown that thermal decomposition of treated samples takes place at lower temperatures as compared to the untreated pine sample because of the catalyzing effects of the chemicals in the samples. Th...
Investigation of emissions from thermal oxidation of waste wood samples using spectral methods
YURDAKUL, Sema; Atımtay, Aysel (2015-01-01)
The objective of this study was to investigate the effects of chemical treatment and heating rate on the emissions released from various waste wood samples including untreated pine and chemically treated MDF, plywood and particleboard after thermal treatment. Emission characteristics of the samples were determined in situ by using their FTIR spectra. Some toxic and carcinogenic gases such as formaldehyde, isocyanate, ammonia and phenyl group were detected in emissions from low temperature combustion of trea...
An Investigation of the Kinetics and Oxidative Thermodegradation Properties of Waste Telephone Pole Samples Treated with Metal Salts
Yorulmaz, S. Y.; Atımtay, Aysel (2013-12-02)
In the present study, combustion mechanisms, activation energy, and exponential constants were investigated for natural pine and acid copper chromate impregnated telephone pole. Oxidative thermodegradation was carried out in air environment at different heating rates by using thermogravimetric analysis. In order to calculate thermal kinetics, the Coats Redfern method was used. There were less flammable products, lower weight losses in the main oxidation region, a decrease in the maximum weight loss temperat...
Investigation of effect of kaolin addition on combustion characteristic of olive residue
Batır, Özge; Külah, Görkem; Selçuk, Nevin; Department of Chemical Engineering (2017)
In this thesis study, effect of kaolin addition on combustion characteristic of olive residue was investigated by using thermogravimetric analyzer (TGA) combined with Fourier-transform infrared (FTIR) spectrometer in parallel with ash characteristics by X-Ray Fluorescence (XRF) and X-Ray Diffraction (XRD). The experiments were carried out by burning olive residue with 2%, 4% and 8% by wt. kaolin at 900˚C. Results reveal that addition of kaolin leads to decrease in rate of weight loss during char combustion ...
Investigation of co-combustion characteristics of low quality lignite coals and biomass with thermogravimetric analysis
Varol, Murat; Atımtay, Aysel; Bay, B.; Olgun, H. (2010-10-20)
In this study, combustion and co-combustion characteristics of three biomass fuels and three Turkish lignite coals were investigated by using a thermo gravimetric analyzer. There are just a few studies investigating the co-combustion characteristics of coal and biomass, and the synergistic effect of their various combinations on the peak temperatures and burnout times.
Citation Formats
S. Y. Yorulmaz and A. Atımtay, “Investigation of Combustion Kinetics of Five Waste Wood Samples with Thermogravimetric Analysis,” 2007, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/30756.