Kinetic modeling of thermal decomposition of natural cellulosic materials in air atmosphere

Liu, N.A.; Fan, Weicheng; Dobashi, Ritsu; Huang, Liusheng

doi:10.1016/s0165-2370(01)00161-9

Cited by 137 publications

(89 citation statements)

References 38 publications

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“…Other authors employed 3 and 10 mg sample masses in air at 10-12°C/min. 29,30 Under such circumstances we have observed the combustion of the samples exhibiting sharp, tall DTG peaks at lower temperatures than the corresponding DTG peaks of the low sample mass experiments. The buoyancy effect in the low sample mass experiments was corrected by subtracting the TG signal of similar experiments with empty sample holders.…”

Section: Methodsmentioning

confidence: 77%

Thermogravimetric and Reaction Kinetic Analysis of Biomass Samples from an Energy Plantation

et al. 2004

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The effect of oxygen in the ambient gas was studied at low sample masses (0.2 -0.4 mg) that excluded 2 the overheating due to the high reaction heat of the combustion process. The presence of oxygen affects the decomposition from ca. 220°C. Nevertheless, the extrapolated onset temperature of the hemicellulose decomposition is practically the same at 0, 5 and 21 V/V% oxygen. A group of 12 experiments, representing two grinding levels, three plant genera and four different heating programs were evaluated simultaneously by the method of least squares employing the model of independent pseudocomponents. All evaluated experiments were well described by the same set of kinetic parameters; only the parameters describing the peak area of the partial processes differed. A technique was recommended for the appropriate handling of the non-random errors in the simultaneous evaluation of experiment series.

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Section: Methodsmentioning

confidence: 77%

Thermogravimetric and Reaction Kinetic Analysis of Biomass Samples from an Energy Plantation

et al. 2004

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“…Font et al, (1991) recorded one major peak for the degradation of cotton stalk, sugar cane bagasse, and rice straw, under nitrogen, while the same author reported two peaks for the degradation of these bio-resources under oxygen. The changes in the experimental condition such as the heating rate and atmospheric condition may sometimes merge the two peaks into one very broad peak (Barneto et al;Font et al, 1991;Liu et al, 2002). This could be responsible for the wide peak with a shoulder around 300°C observed in Figures 3 and 4.…”

Section: Journal Of Agricultural Studiesmentioning

confidence: 96%

Thermal Degradation Analysis on 4-year-old Culms of Cultivated Tropical Bamboo Bambusa Vulgaris

Wahab

Mustafa

Fauzi³

et al. 2017

JAS

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The thermal degradation of matured 4-year-old culms of cultivated tropical bamboo Bambusa vulgaris was studied and analyzed. The analysis using the Fourier Transform Infrared Spectroscopy and Thermal Gravimetric Analysis revealed the presence of basic functional groups in the bamboo which consists mainly of ester, carbonyl, and hydroxyl groups. The chemicals present in the bamboo vary depending on the location of the samples taken from the bamboo culms. The moisture content and extractive were omitted in the kinetic study since they constituted less than 10% of the overall chemicals in bamboo and observed below 100℃. Low reactivity of lignin components and hemicellulose in bamboo occurred due to the peculiarities of the chemical structure and composition. The mechanism of the decomposition ISSN 2166-0379 2017 http://jas.macrothink.org 51 reactions taken as a three-step reaction which involved the activation energies and dynamics related to volatile fractions of hemicellulose, cellulose, and lignin. Activation energies of 46, 100, 105, 127, and 236 kJ/mol applied for all of the bamboos. The activation energy carried could provide better insight into the thermal decomposition process. It provides more information on critical energy needed to start a reaction. The decomposition activation energy range obtained could assist in understanding the thermal decomposition stability of the bamboo fibers and application in natural fiber reinforced polymer composite industry. Journal of Agricultural Studies

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“…Los autores mencionan que en el análisis DTG se obtuvieron dos picos principales que corresponden a las dos velocidades máximas de pérdida de masa. Los resultados de la energía de activación no muestran una diferencia significativa en cada una de las muestras y son comparables a otras investigaciones (Liu et al 2002). Finalmente, se reporta que el riesgo de ignición a partir de polvo de madera de pino loblolly, es relativamente alto, debido a que se obtuvo una cantidad de calor mayor a 5000 kJ/kg cuando se hizo reaccionar en aire una fracción de polvo muy fina.…”

Section: Pinus Taedaunclassified

Estudio de cinética en procesos termogravimétricos de materiales lignocelulósicos

Flores

Rutiaga-Quiñones

2018

Maderas, Cienc. tecnol.

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RESUMENLa madera de pino representa el 20% de las especies forestales plantadas en todo el mundo, y actualmente es de vital importancia en aplicaciones industriales como en aserrío, fabricación de papel y medicina. Actualmente, se ha destacado su uso en aplicaciones energéticas. En este estudio se presenta una breve revisión sobre el análisis térmico realizado a diversas especies de madera de pino. Se enfoca principalmente al análisis de los resultados respecto a cómo varía el contenido de masa o pérdida de peso con el cambio de temperatura a partir del análisis de las curvas de termogravimetría y su derivada. Se considerarón diversas especies de madera de pino: Pinus caribaea, Pinus patula, Cupressus sempervirens, Pinus pinaster, Pinus radiata, Pinus sylvestris, Pinus pinea y Pinus taeda.Con el objetivo de mostrar las diferencias y similitudes respecto a la estabilidad térmica de las especies mencionadas, se han discutido los principales parámetros a partir de las curvas de termogravimetría como energía de activación, factor pre-exponencial y orden de reacción. Además, se examinan las etapas de descomposición de acuerdo a los principales componentes de la madera tales como agua, celulosa, hemicelulosa, lignina y extractivos.Palabras clave: Conversión térmica, Cupressus sempervirens, energía renovable, parámetros cinéticos, Pinus sp. ABSTRACTPine wood accounts for 20% of the world's planted forest species, and is currently of vital importance in industrial applications such as sawmills, papermaking and medicine. Actually, its use in energy applications has been emphasized. This study presents a brief review on the thermal analysis of various species of pine wood. We focus mainly on the analysis of the results regarding how the mass content or weight loss varies with the temperature change from the analysis of the thermogravimetric curves and its derivative. Several species of pine wood have been considered: Pinus caribaea, Pinus patula, Cupressus sempervirens, Pinus pinaster, Pinus radiata, Pinus sylvestris, Pinus pinea and Pinus taeda. In order to show the differences and similarities with respect to the thermal stability of the mentioned species, we have discussed the main parameters from the thermogravimetry curves such as activation energy, pre-exponential factor and reaction order. In addition, the decomposition stages are examined according to the main components of the wood such as water, cellulose, hemicellulose, lignin and extractives.

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Kinetic modeling of thermal decomposition of natural cellulosic materials in air atmosphere

Cited by 137 publications

References 38 publications

Thermogravimetric and Reaction Kinetic Analysis of Biomass Samples from an Energy Plantation

Thermogravimetric and Reaction Kinetic Analysis of Biomass Samples from an Energy Plantation

Thermal Degradation Analysis on 4-year-old Culms of Cultivated Tropical Bamboo Bambusa Vulgaris

Estudio de cinética en procesos termogravimétricos de materiales lignocelulósicos

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