Direct analysis of phenolic extractives in wood by thermochemolysis-gas chromatography in the presence of tetrabutylammonium hydroxide

Ishida, Yasuhiro; Goto, Kuniyoshi; Yokoi, Haruhiko; Tsuge, Shin; Ohtani, Hajime; Sonoda, Tsutomu; Ona, Toshihiro

doi:10.1016/j.jaap.2006.06.009

Cited by 38 publications

(27 citation statements)

References 10 publications

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“…The value of crystallinity index obtained using Equation (1) can be attributed to different hydroxyl group (alcohol/phenol) stretching vibrations [25][26][27][28]. The band at 2937 cm could be a result of aliphatic saturated C-H stretching vibrations (asymmetric and symmetric methyl and methylene stretching groups) from extractives and lignin components of the biomass since fatty acid methyl esters and phenolic acid methyl esters, have methyl and methylene groups [29][30][31][32]. In the fingerprint region, the band at 1600 cm −1 may be due to the ring-conjugated C=C bonds of lignin while the band observed at 1200 cm −1 may be an indication of O-H bending in the cellulose and hemicellulose components of the biomass [5,25,26,28,[33][34][35][36].…”

Section: Resultsmentioning

confidence: 99%

Comprehensive Characterization of Napier Grass as a Feedstock for Thermochemical Conversion

et al. 2015

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Study on Napier grass leaf (NGL), stem (NGS) and leaf and stem (NGT) was carried out. Proximate, ultimate and structural analyses were evaluated. Functional groups and crystalline components in the biomass were examined. Pyrolysis study was conducted in a thermogravimetric analyzer under nitrogen atmosphere of 20 mL/min at constant heating rate of 10 K/min. The results reveal that Napier grass biomass has high volatile matter, higher heating value, high carbon content and lower ash, nitrogen and sulfur contents. Structural analysis shows that the biomass has considerable cellulose and lignin contents which are good candidates for good quality bio-oil production. From the pyrolysis study, degradation of extractives, hemicellulose, cellulose and lignin occurred at temperature around 478, 543, 600 and above 600 K, respectively. Kinetics of the process was evaluated using reaction order model. New equations that described the process were developed using the kinetic parameters and data compared with experimental data. The results of the models fit well to OPEN ACCESSEnergies 2015, 8 3404 the experimental data. The proposed models may be a reliable means for describing thermal decomposition of lignocellulosic biomass under nitrogen atmosphere at constant heating rate.

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Section: Resultsmentioning

confidence: 99%

Comprehensive Characterization of Napier Grass as a Feedstock for Thermochemical Conversion

et al. 2015

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“…Wood extractives are non-structural lipophilic constituents of wood consisting mainly of triglycerides, resin acids, free long chain fatty acids, sterols, waxes and steryl esters (Dorado et al 2000, Ishida et al 2007, He et al 2013. Although extractives are a minor component in wood, generally their content varies between 2% and 5% (Shebani et al 2008) and they can cause several problems in industrial applications.…”

Section: Introductionmentioning

confidence: 99%

Effect of extractive content on the thermal stability of two wood species from Brazil

Poletto

2016

Maderas, Cienc. tecnol.

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The influence of extractive content on the thermal stability and kinetic degradation of two wood species has been investigated using chemical analysis and thermogravimetry. Two wood species were studied: Pinus taeda and Eucalyptus grandis. Thermogravimetric results showed that higher extractive contents in the wood accelerate the degradation process and promote an increase in the conversion values at lower temperatures reducing the wood thermal stability. After removing the extractives from wood the thermal stability for both wood species increased. The results also demonstrated that prior information about the wood composition can be helpful to increase the range of industrial applications of wood.

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“…In addition, TBAOH behaves as highly conducting ionic liquids and bulky nature of the tetrabutylammonium cation reduces intermolecular interactions [2]. Pure TBAOH has been used as phase transfer catalysts for diverse chemical transformations [1,[3][4][5], as template for preparing nanoparticles [6], for transesterification [7], in thermochemolysisgas chromatography [8], and for other commercial processes [9]. In all these processes, TBAOH purity enhances its catalytic performance.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical membrane reactor: Synthesis of quaternary ammonium hydroxide from its halide by in situ ion substitution

Kumar

Tripathi

Saxena

et al. 2009

Electrochimica Acta

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Direct analysis of phenolic extractives in wood by thermochemolysis-gas chromatography in the presence of tetrabutylammonium hydroxide

Cited by 38 publications

References 10 publications

Comprehensive Characterization of Napier Grass as a Feedstock for Thermochemical Conversion

Comprehensive Characterization of Napier Grass as a Feedstock for Thermochemical Conversion

Effect of extractive content on the thermal stability of two wood species from Brazil

Electrochemical membrane reactor: Synthesis of quaternary ammonium hydroxide from its halide by in situ ion substitution

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