Analysis of wood vacuum pyrolysis solid residues by diffuse reflectance infrared Fourier transform spectrometry

Pakdel, Hooshang; Grandmaison, J. L.; Roy, C.

doi:10.1139/v89-051

Cited by 9 publications

(3 citation statements)

References 15 publications

(22 reference statements)

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“…These spectra were practically identical, indicating that the main chemical constituents of the two charcoals are effectively the same. The vacuum pyrolysis residue of Populus deltoides (Pakdel et al, 1989) gave a surprisingly similar spectrum, although its carbonyl content appeared to be a little higher.…”

Section: Resultsmentioning

confidence: 92%

Formation of charcoal from biomass in a sealed reactor

Mok¹,

Antal²,

Szabó³

et al. 1992

Ind. Eng. Chem. Res.

162

164

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Section: Resultsmentioning

confidence: 92%

Formation of charcoal from biomass in a sealed reactor

Mok¹,

Antal²,

Szabó³

et al. 1992

Ind. Eng. Chem. Res.

162

164

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“…Diffuse reflectance infrared spectroscopy (DRIFT) was used for the determination of lignin, glucose and xylose in pre-treated wood (Schultz et al 1985), in thermally modified wood (Grandmaison et al 1987), and in the solid residues of vacuum pyrolysis of wood (Pakdel et al 1989). DRIFT spectroscopy was also used with pulp to determine lignin and carbohydrates (Berben et al 1987;Backa and Brolin 1991;Wällbacks et al 1991).…”

Section: Introductionmentioning

confidence: 99%

Determination of Monosaccharide Composition of Eucalyptus globulus Wood by FTIR Spectroscopy

Rodrigues¹,

Puls²,

Faix³

et al. 2001

Holzforschung

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The extractive-free samples were first dried in an oven at 60°C overnight and further dried over P2O5 in a vacuum desiccator. About 200 mg of the sample was milled in a vibratory ball mill (Mixer Mill MM2, Retsch) for 45 minutes. Holzforschung / Vol. 55 / 2001 / No. 3 Summary FTIR spectroscopy was used to estimate monosaccharide content in Eucalyptus globulus wood, using the natural variability of the species for calibration and validation of the method . A total of 38 samples from 9 year old trees from provenance trials was used. The composition ranged for glucose from 43.2 % to 59.5 %, for xylose from 9.4 % to 17.8 %, for galactose from 0.5 % to 5.4 %, for mannose from 0 % to 2.8 %, and for rhamnose from 0.3 % to 0.8 %, based on extractive-free dry wood. The multivariate analysis gave in general, better results with increased R 2 , lower SEC and SEP errors, although the univariate method also gave good fits with high coefficient of determination (R 2 ) based on remaining data once outliers were removed. FTIR techniques may be used in large scale breeding programmes to measure wood monosaccharide composition with considerably less effort and in shorter time than wet-lab methods, once a reliable calibration has been made for the species. Keywords Monosaccharide compositionEucalyptus globulus FTIR Univariate analysis Multivariate analysis Brought to you by | HEC Bibliotheque Maryriam ET J.

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“…The chemical mechanism of the charcoal formation itself differs in the classical and the HY methods, as shown by recent studies. − The aim of the present study is to learn about the chemical properties, thermal behavior, and reactivity of the HY biomass charcoals. Thermogravimetry (TG) has proved to be a useful tool for charcoal studies. − Simultaneous thermogravimetry−mass spectrometry (TG-MS) helps to obtain a deeper knowledge about the gasification properties of chars − and the devolatilization of biomass materials. , Fourier transform infrared spectroscopy (FTIR) is frequently used to characterize biomass chars. ,− …”

Section: Introductionmentioning

confidence: 99%

TG, TG-MS, and FTIR Characterization of High-Yield Biomass Charcoals

et al. 1998

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The pyrolysis and combustion characteristics of various high-yield charcoals manufactured in a process development unit were studied by thermogravimetry, thermogravimetry -mass spectrometry, and Fourier transform infra-red spectrometry. Charcoals resulting from two runs with a macadamia nutshell feedstock, and one run with a Eucalyptus wood feedstock are compared. The peculiarities of devolatilization, oxygen gasification (temperature-programmed combustion), and the formation of nitrogen oxides are discussed. Small sample sizes (0.2 -4 mg) were employed to minimize the effects of heat and mass transfer limitations;nevertheless the results offered a reliable characterization of kilograms of charcoal. Samples produced in different runs or taken from different parts of the reactor behaved similarly with only minor differences that we attribute to reactor inhomogeneities and variations in feedstock composition. In the presence of oxygen, two partial processes were detected. The lower temperature weight loss may be due to devolatilization of the char and oxidation of the volatile matter, that results in a carbonized residue. The residue burns off around 450 -500C. The rate of both processes evidenced strong dependence on oxygen concentration, indicating an unexpected influence of oxidation on the low temperature devolatilization processes. The intensity of the mass-spectrometric ion signal for NO + , which represents the formation of nitrogen oxides, did not follow the overall mass loss rate curves (DTG). The peak temperatures of the NO + and DTG curves differed by 3 -9 ºC. These differences were influenced by the feedstock composition, but did not depend on such operating conditions as the heating rate and oxygen concentration. Elevated pressure thermogravimetry revealed that a very high partial pressure of CO2 in the carrier gas (577 kPa) has only negligible influence on the rate of the temperature programmed combustion.

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Analysis of wood vacuum pyrolysis solid residues by diffuse reflectance infrared Fourier transform spectrometry

Cited by 9 publications

References 15 publications

Formation of charcoal from biomass in a sealed reactor

Formation of charcoal from biomass in a sealed reactor

Determination of Monosaccharide Composition of Eucalyptus globulus Wood by FTIR Spectroscopy

TG, TG-MS, and FTIR Characterization of High-Yield Biomass Charcoals

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