Investigation of the chemical modifications of beech wood lignin during heat treatment

Brosse, Nicolas; Hage, Roland El; Chaouch, Mounir; Pétrissans, Mathieu; Dumarçay, Stéphane; Gérardin, Philippe

doi:10.1016/j.polymdegradstab.2010.05.018

Cited by 151 publications

(104 citation statements)

References 22 publications

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“…In spite of its structural diversity, LP had similar thermal decomposition behaviour as LS, as shown by the cleavage of methoxyl groups in aryl-O-CH3 and the cleavage of α, β-alkyl, and aryl ether units (Boeriu et al 2004;Brosse et al 2010).…”

Section: Xylanmentioning

confidence: 99%

TGA-FTIR Analysis of Torrefaction of Lignocellulosic Components (cellulose, xylan, lignin) in Isothermal Conditions over a Wide Range of Time Durations

Lv¹,

Perré²,

Perré³

2015

BioResources

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This study investigated chemical decomposition of lignocellulosic components in the course of torrefaction under isothermal conditions for durations up to 5 hours. The goal was a better understanding of the behaviour of biomass, at both short and long residence times, which is important for innovation in the chemical and bioenergy industries. Gaseous and solid-phase decomposition products of cellulose, xylan, and two lignins, were studied following torrefaction at three temperatures (220, 250, and 280 °C) for a continuous recording of mass loss and emission of volatiles over 5 hours. Two decomposition stages were revealed for xylan, with a notable release of CO that increased with treatment temperature. 4-O-methyl glucurono-units on the side chains of xylan degraded first, and acetyl groups and macromolecule fragments accounted for the second degradation, starting at 250 °C. The primary production of acetic acid occurred at 280 °C. For the two lignins, decomposition reactions predominated at lower temperatures, while rearrangement prevailed at 280 °C. The emission of phenol was a clear distinction between the two. Cellulose was thermally stable at short times under all treatments, but it decomposed dramatically afterwards, especially at 280 °C.

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Section: Xylanmentioning

confidence: 99%

TGA-FTIR Analysis of Torrefaction of Lignocellulosic Components (cellulose, xylan, lignin) in Isothermal Conditions over a Wide Range of Time Durations

Lv¹,

Perré²,

Perré³

2015

BioResources

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“…These compounds are derived from thermal decomposition of cellulose, but mainly from hemicelluloses, which are decomposed at lower temperatures (Weiland and Guyonnet 2003). The decomposition of hemicelluloses contributes greatly to the reduction of the fungus attack, as they are the most easily digested wood molecules for fungi (Tjeerdsma et al 1998;Hakkou et al 2006;Boonstra et al 2007;Windeisen et al 2007;Brosse et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Static Bending Strength of Heat-Treated and Chromated Copper Arsenate-Treated Plywood

Silva

Campos

2017

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aPlywood can be used in the furniture industry and in civil construction due to its structural strength. However, for long useful life in construction, especially in tropical countries, it needs to undergo treatments against xylophagous organisms. The most common preservative treatment is the chemical chromated copper arsenate (CCA); there are alternatives, such as heat treatment, that do not use chemicals. The objective of this work was to evaluate the mechanical resistance of CCA and heat-treated plywood prepared at three different temperatures (160 °C, 180 °C, and 200 °C). Pinus taeda plywood with seven veneers and phenol-formaldehyde adhesive was produced and subjected to the preservative treatments. The results showed that the CCA treatment reduced the mechanical strength of the panels, while the heat treatment did not. Heat treatment also decreased panel hygroscopicity, indicating a better dimensional stability.

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“…Este tratamento degrada as hemiceluloses, destruindo monômeros como arabinose, manose, galactose e xilose (BRITO et al, 2008;SEVERO et al;BROSSE et al;2010), com liberação de extrativos como o ácido acético, furfural e mono, sesqui e diterpenos (ESTEVES et al, 2011). No entanto, as ligninas e celulose são menos afetadas (YILDIZ et al, 2006;TUMEN et al, 2010).…”

Section: Introductionunclassified

Química e colorimetria da madeira de Eucalyptus grandis W. Mill ex Maiden termorretificada

et al. 2014

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Investigation of the chemical modifications of beech wood lignin during heat treatment

Cited by 151 publications

References 22 publications

TGA-FTIR Analysis of Torrefaction of Lignocellulosic Components (cellulose, xylan, lignin) in Isothermal Conditions over a Wide Range of Time Durations

TGA-FTIR Analysis of Torrefaction of Lignocellulosic Components (cellulose, xylan, lignin) in Isothermal Conditions over a Wide Range of Time Durations

Static Bending Strength of Heat-Treated and Chromated Copper Arsenate-Treated Plywood

Química e colorimetria da madeira de Eucalyptus grandis W. Mill ex Maiden termorretificada

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