Effect of hydrothermal treatment intensity on the formation of degradation products from birchwood

M. Borrega, Klaus Niemelä (Corresponding Author), H. Sixta

Research output: Contribution to journalArticleScientificpeer-review

19 Citations (Scopus)

Abstract

Hydrothermal treatments (HT) of birchwood were conducted at various intensities to extract the hemicelluloses before pulping. The amount of hemicellulose-derived sugars in the hydrolysates, including xylulose, an isomerization product of xylose, reached first a maximum and then decreased with further increasing treatment intensity. The hydrolysates also contained furanic compounds, carboxylic acids, and a large variety of aromatics, the amounts of which were dependent on HT intensity. At high treatment intensities, furfural and acetic acid were the main products quantified. Numerous nonvolatile, low molar mass carboxylic acids were also formed, with 3-deoxypentonic acid being the most abundant. Additionally, almost 40 aromatic monomers and up to 30 dimers were detected. Syringaldehyde was the main monomer and syringaresinol was the main dimer. Some aromatic compounds could not be identified. The complexity of the hydrolysates, particularly after high-intensity HT, requires selective filtration and purification methods before the hydrolysates can be utilized in downstream processes.
Original languageEnglish
Pages (from-to)871-879
Number of pages8
JournalHolzforschung
Volume67
Issue number8
DOIs
Publication statusPublished - 2013
MoE publication typeA1 Journal article-refereed

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Carboxylic Acids
Carboxylic acids
Dimers
Monomers
Xylulose
Furaldehyde
Degradation
Furfural
Xylose
Molar mass
Aromatic compounds
Isomerization
Acetic acid
Sugars
Acetic Acid
Purification
Acids
hemicellulose
3-deoxypentonic acid
syringaresinol

Keywords

  • birchwood
  • carboxylic acids
  • degradation products
  • GC/MS
  • hydrolysate
  • hydrothermal treatment

Cite this

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title = "Effect of hydrothermal treatment intensity on the formation of degradation products from birchwood",
abstract = "Hydrothermal treatments (HT) of birchwood were conducted at various intensities to extract the hemicelluloses before pulping. The amount of hemicellulose-derived sugars in the hydrolysates, including xylulose, an isomerization product of xylose, reached first a maximum and then decreased with further increasing treatment intensity. The hydrolysates also contained furanic compounds, carboxylic acids, and a large variety of aromatics, the amounts of which were dependent on HT intensity. At high treatment intensities, furfural and acetic acid were the main products quantified. Numerous nonvolatile, low molar mass carboxylic acids were also formed, with 3-deoxypentonic acid being the most abundant. Additionally, almost 40 aromatic monomers and up to 30 dimers were detected. Syringaldehyde was the main monomer and syringaresinol was the main dimer. Some aromatic compounds could not be identified. The complexity of the hydrolysates, particularly after high-intensity HT, requires selective filtration and purification methods before the hydrolysates can be utilized in downstream processes.",
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Effect of hydrothermal treatment intensity on the formation of degradation products from birchwood. / Borrega, M.; Niemelä, Klaus (Corresponding Author); Sixta, H.

In: Holzforschung, Vol. 67, No. 8, 2013, p. 871-879.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Effect of hydrothermal treatment intensity on the formation of degradation products from birchwood

AU - Borrega, M.

AU - Niemelä, Klaus

AU - Sixta, H.

PY - 2013

Y1 - 2013

N2 - Hydrothermal treatments (HT) of birchwood were conducted at various intensities to extract the hemicelluloses before pulping. The amount of hemicellulose-derived sugars in the hydrolysates, including xylulose, an isomerization product of xylose, reached first a maximum and then decreased with further increasing treatment intensity. The hydrolysates also contained furanic compounds, carboxylic acids, and a large variety of aromatics, the amounts of which were dependent on HT intensity. At high treatment intensities, furfural and acetic acid were the main products quantified. Numerous nonvolatile, low molar mass carboxylic acids were also formed, with 3-deoxypentonic acid being the most abundant. Additionally, almost 40 aromatic monomers and up to 30 dimers were detected. Syringaldehyde was the main monomer and syringaresinol was the main dimer. Some aromatic compounds could not be identified. The complexity of the hydrolysates, particularly after high-intensity HT, requires selective filtration and purification methods before the hydrolysates can be utilized in downstream processes.

AB - Hydrothermal treatments (HT) of birchwood were conducted at various intensities to extract the hemicelluloses before pulping. The amount of hemicellulose-derived sugars in the hydrolysates, including xylulose, an isomerization product of xylose, reached first a maximum and then decreased with further increasing treatment intensity. The hydrolysates also contained furanic compounds, carboxylic acids, and a large variety of aromatics, the amounts of which were dependent on HT intensity. At high treatment intensities, furfural and acetic acid were the main products quantified. Numerous nonvolatile, low molar mass carboxylic acids were also formed, with 3-deoxypentonic acid being the most abundant. Additionally, almost 40 aromatic monomers and up to 30 dimers were detected. Syringaldehyde was the main monomer and syringaresinol was the main dimer. Some aromatic compounds could not be identified. The complexity of the hydrolysates, particularly after high-intensity HT, requires selective filtration and purification methods before the hydrolysates can be utilized in downstream processes.

KW - birchwood

KW - carboxylic acids

KW - degradation products

KW - GC/MS

KW - hydrolysate

KW - hydrothermal treatment

U2 - 10.1515/hf-2013-0019

DO - 10.1515/hf-2013-0019

M3 - Article

VL - 67

SP - 871

EP - 879

JO - Holzforschung

JF - Holzforschung

SN - 0018-3830

IS - 8

ER -