Thermal analysis of less common lignocellulose fibers

d’Almeida, A. L. F. S.; Barreto, Daniel Weingart; Calado, Verônica; d’Almeida, J.R.M.

doi:10.1007/s10973-007-8606-6

Cited by 90 publications

(36 citation statements)

References 16 publications

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“…The first exothermic peak in the DSC curve at 345°C represented the main mass loss on the TG curves (70 %), whereas the second DSC peak, starting at 350°C (the temperature of TG bending) and with maximum at about 370°C, was lower but wider than in the first step and was related to a mass loss of about 20 % on the TG curve. The first DSC peak could be attributed to the decomposition of hemicellulose [25], although the values obtained in this study were slightly higher than the usual range attributed to hemicellulose thermal decomposition, from 270 to 281°C [31]. The second peak is usually regarded as cellulose degradation step [5].…”

Section: Comparison Of Pyrolysis and Combustion Processescontrasting

confidence: 62%

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Application of a device used for observation of controlled thermal processes in a furnace

Hebda

Laska

Szechyńska‐Hebda

2013

J Therm Anal Calorim

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This paper describes an appliance that allows to visually observe phenomena occurring in the studied materials during heating, from room temperature to 600°C. The design criteria and device construction are described in details. The device allows for visual observation of physical phenomena of various material types, e.g., organic matter, polymers, and even observation of sintering mechanisms. Analysis of lubricant evaporation from powder metals (an aluminum alloy) in different atmospheres is shown. The featured device can also be used for interpretation of material defects. This is presented on the example of heating the aluminum alloy in an atmosphere containing oxygen (to simulate a furnace leakage). In addition, the influence of experimental atmosphere on melting and sintering processes is demonstrated. Another application of the presented device can be the visual observation of differences between combustion and pyrolysis processes. Our results show that the presented device is complementary with an advanced thermoanalysis apparatus which, in turn, does not allow visual observation of samples.

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Section: Comparison Of Pyrolysis and Combustion Processescontrasting

confidence: 62%

“…8). The initial low temperature mass loss at 100°C corresponds to loss of moisture and is a common feature observed for lignocellulose fibers [25,26]. No degradation took place and the wood was considered as thermally stable at this stage.…”

Section: Comparison Of Pyrolysis and Combustion Processesmentioning

confidence: 98%

Application of a device used for observation of controlled thermal processes in a furnace

Hebda

Laska

Szechyńska‐Hebda

2013

J Therm Anal Calorim

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“…The Kissinger method [15] is extensively used in literature for determining the activation energy of experimental data obtained under linear heating rate conditions. Thus, more than 2000 citations can be found for the original publication, many of them in this journal [16][17][18][19][20][21][22][23][24][25]. Recently, the Kissinger method has been extended [26][27][28][29][30] to the kinetic analysis of Hi-Res data.…”

Section: Introductionmentioning

confidence: 99%

Kissinger kinetic analysis of data obtained under different heating schedules

Jiménez

Criado

Pérez‐Maqueda

2008

J Therm Anal Calorim

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The dynamic heating rate method developed by TA Instruments (Hi-Res ™ ) is a kind of sample controlled thermal analysis in which a linear relationship between the logarithm of the heating rate and the rate of weight change is imposed. It is shown in this paper that the reacted fraction at the maximum reaction rate strongly depends on the parameters selected for the Hi-Res heating algorithm, what invalidates the use of the Kissinger method for analysing Hi-Res data unless that the reaction fits a first order kinetic law. Only in this latter case, it has been demonstrated that it is not required that a constant value of the reacted fraction at the maximum reaction rate is fulfilled for determining the activation energy from the Kissinger method. In such a case the Kissinger plot gives the real activation energy, independently of both the heating schedule used and the value of the reacted fraction, α m , at the maximum.

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“…As shown in Fig. S1 (b), the differential thermal analysis displays a wide band with a shoulder at approximately 280°C and a maximum point at 350°C, which may be associated with hemicellulose, cellulose and lignin decomposition [14]. Whereas, the weight loss of the three resulting carbons were quite small ( < 15%), and no burn-off appeared at higher temperatures ( > 600°C), indicating that the raw JAS had been completely carbonized.…”

Section: Characterization Of Resulting Carbonsmentioning

confidence: 93%

Fabrication, characterization and evaluation of mesoporous activated carbons from agricultural waste: Jerusalem artichoke stalk as an example

Luo

2014

Front. Environ. Sci. Eng.

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This work explores the feasibility of Jerusalem artichoke stem (JAS), an agricultural waste, as an alternative precursor for fabrication of mesoporous activated carbon (MAC) via conventional ZnCl 2 activation. The as-prepared JAS-MACs were characterized by thermogravimetric, nitrogen gas adsorption isotherm and high resolution scanning electron microscopy analysis. The interacting effects of chemical dosage, activation temperature and time on the mesoporosity, mesopore volume and carbon yield were investigated, and further optimized by response surface methodology (RSM). The Brunauer-Emmett-Teller surface area, mesoporosity and mesopore volume of the JAS-MAC prepared under optimum condition were identified to be 1631 m 2 $g -1 , 90.16% and 1.11 cm 3 $g -1 , respectively. Compared with commercial activated carbons, this carbon exhibited a comparable monolayer adsorption capacity of 374.5 mg $g -1 for Methylene Blue dye. The findings suggest that RSM could be an effective approach for optimizing the pore structure of fabricated activated carbons.

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Thermal analysis of less common lignocellulose fibers

Cited by 90 publications

References 16 publications

Application of a device used for observation of controlled thermal processes in a furnace

Application of a device used for observation of controlled thermal processes in a furnace

Kissinger kinetic analysis of data obtained under different heating schedules

Fabrication, characterization and evaluation of mesoporous activated carbons from agricultural waste: Jerusalem artichoke stalk as an example

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