Thermal decomposition kinetics of balsa wood: Kinetics and degradation mechanisms comparison between dry and moisturized materials

TranVan, Luan; Legrand, Vincent; Jacquemin, Frédéric

doi:10.1016/j.polymdegradstab.2014.09.004

Cited by 50 publications

(37 citation statements)

References 19 publications

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“…Heat generation and weight loss caused by char combustion were observed at temperatures exceeding 380 • C [18][19][20][21]. The decomposition temperature ranged from approximately 170-180 • C for all samples.…”

Section: Thermogravimetric Differential Thermal Analysismentioning

confidence: 92%

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Evaluating the Fires and Oxygen Deficiency Risks Caused by Stored Agricultural Waste

et al. 2018

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In the Japanese agricultural industry, efforts are being made to recycle waste produced in order to use resources more efficiently. However, in some cases, when stored for long periods of time these materials generate heat through fermentation, which can eventually result in spontaneous ignition or oxygen deficiency in storage areas, resulting in the deaths of workers. In this study, we conducted a series of experiments on several types of agricultural waste (organic waste generated by agricultural production activities in Japan) frequently stored for recycling, using combinations of various thermal-and gas-analysers, in order to identify the risk factors related to spontaneous ignition and oxygen deficiency accidents. The aim of this research was to understand the circumstances leading to spontaneous ignition and oxygen deficiency accidents in storage facilities and to recommend safety measures to prevent such occurrences. Our results suggest that fermentation is likely responsible for the generation of heat and production of carbon dioxide at temperatures up to approximately 50 • C, where microbial activity diminishes. At temperatures beyond 50 • C, a transition into heat generation by the oxidation of fatty acid esters occurs. Additionally, when the barrier of heat absorption is overcome at around 100 • C due to the evaporation of water, there is a transition to thermal cracking that could lead to fire. Accidents due to oxygen deficiency may occur when a storage facility is well sealed and the amount of oxygen circulation is minimal. However, when the amount of oxygen is sufficient; the substance is stored in large deposits; and the facility is well insulated, fermentation can cause the temperature to increase. Therefore, it is desirable to periodically measure the temperature of stored materials and monitor the generated gases.

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Section: Thermogravimetric Differential Thermal Analysismentioning

confidence: 92%

“…Based on the results of Figures 8-12, in all samples, heat generation produced by fatty acid esters was observed at temperatures ranging from 80 • C to 100 • C [4,[21][22][23]; at temperatures higher than 100 • C, heat generation was caused by thermal decomposition [18,19].…”

Section: Calorimetrymentioning

confidence: 93%

Evaluating the Fires and Oxygen Deficiency Risks Caused by Stored Agricultural Waste

et al. 2018

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“…This step occurred in order to break the bonds between wood (cellulose, lignin) and 4-methyl catechol. This step released combustible gases such as carbon monoxide, hydrogen, and methane, as well as carbon dioxide and tars that predominate as the temperature rises (Tomczak et al 2007;TranVan et al 2014). In this stage, TW at pH 8 were thermally more stable than TW at pH 9, because of cellulose-O-4-methyl catechol bonding in the glycoside chain.…”

Section: Rawmentioning

confidence: 99%

Impact of Various pH Levels on 4-Methyl Catechol Treatment of Wood

et al. 2017

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Four types of treated wood (TW) were prepared by the impregnation of solid wood each with a solution of 4-methyl catechol at pH 8, a solution of 4-methyl catechol at pH 9, a solution of 4-methyl catechol at pH 10, and a solution of 4-methyl catechol at pH 11. These TW were characterized by Fourier transform infrared spectroscopic, X-ray diffraction (XRD), scanning electron microscopic, 3-point bending, freefree-vibration, and thermo-gravimetric analysis. FT-IR result showed that TW had more than one carbonyl absorbance band between 1745 and 1690 cm -1 , while raw wood had only one carbonyl absorbance band in this regard. TW at pH levels of eight and nine showed higher crystallinity index (CIXRD) than that of raw wood. The SEM micrograph of TW at pH 8 had a smoother surface compared with other treated wood and raw wood. The modulus of elasticity (MOE), and modulus of rupture (MOR) of TW at pH 8 and pH 9 significantly increased. The raw wood exhibited a higher water uptake compared with the TW. The TGA results showed that TW were thermally less stable between 267 and 400 °C than raw wood.

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“…1. Balsa consists of cellulose, hemicellulose and lignin components which decompose more or less rapidly depending on the type of degradation [16].…”

Section: Pv Panelsmentioning

confidence: 99%