Hydrothermal decomposition of xylan as a model substance for plant biomass waste – Hydrothermolysis in subcritical water

Pińkowska, Hanna; Wolak, Paweł; Złocińska, Adrianna

doi:10.1016/j.biombioe.2011.06.015

Cited by 84 publications

(33 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At 220 °C a reaction rate constant of 1.3 * 10 -3 s -1 for the xylan hydrolysis has been determined byPinkowska,19 correlated with the present data, this indicates that the xylan and xylose degradation proceed at the same rate. This is reflected by the reaction rate constant of the xylan decomposition for which a value of 4.2 * 10 -4 s -1 is determined for a reaction temperature of 180 °C.…”

supporting

confidence: 90%

“…8,14 ) as well as of biomass model compounds, e.g., cellulose, glucose and xylose in subcritical water has been investigated under various experimental conditions. 19 The use of a hemicellulose model compound in a fundamental investigation provides advantages since the impact of interactions between hemicellulose and cellulose and lignin can be excluded. 19 The use of a hemicellulose model compound in a fundamental investigation provides advantages since the impact of interactions between hemicellulose and cellulose and lignin can be excluded.…”

Section: Scheme 1 -Schematic Illustration Of Lingocellulosementioning

confidence: 99%

See 1 more Smart Citation

Hydrothermal production of furfural from xylose and xylan as model compounds for hemicelluloses

Möller

Schröder

2013

RSC Adv.

View full text Add to dashboard Cite

The uncatalyzed microwave-assisted hydrothermal conversion of xylose and xylan as hemicellulose model compound to furfural at temperatures of 160 -240 °C and reaction times of 5 -120 min is investigated. With acceptable reaction rates already at 200 °C the conversion of xylose provides furfural with a maximum yield of 49%.The conversion of xylan, however, requires lower temperatures (160 -180 °C) in order to promote the hydrolysis of the polymer, yielding xylose as furfural precursor.

show abstract

supporting

confidence: 90%

Section: Scheme 1 -Schematic Illustration Of Lingocellulosementioning

confidence: 99%

Hydrothermal production of furfural from xylose and xylan as model compounds for hemicelluloses

Möller

Schröder

2013

RSC Adv.

View full text Add to dashboard Cite

show abstract

“…Brought to you by | New York University Bobst Library Technical Services Authenticated Download Date | 6/7/15 9:59 AM furanic compounds to levulinic acid and FA (Asghari and Yoshida 2006;Pińkowska et al 2011). Other authors suggested that FA is derived from the anomeric carbon C1 and to a lesser extent from C5 in pentoses (Ahmad et al 1995).…”

Section: Aliphatic Carboxylic Acidsmentioning

confidence: 95%

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

2013

View full text Add to dashboard Cite

Hydrothermal treatments (HT) of birchwood were conducted at various intensities to extract the hemicelluloses before pulping. The amount of hemicellulosederived 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.

show abstract

“…This also explains why xylan or more common xylose, the monomer of xylan, is often used as a representative model compound for hemicellulose [39][40][41].…”

Section: Xylose Degradationmentioning

confidence: 97%

Hydrothermal Liquefaction of Biomass

Toor

Rosendahl

Hoffmann

et al. 2014

Green Chemistry and Sustainable Technology

View full text Add to dashboard Cite

Biomass is one of the most abundant sources of renewable energy, and will be an important part of a more sustainable future energy system. In addition to direct combustion, there is growing attention on conversion of biomass into liquid energy carriers. These conversion methods are divided into biochemical/biotechnical methods and thermochemical methods, such as direct combustion, pyrolysis, gasification, liquefaction, etc. This chapter focuses on hydrothermal liquefaction, where high pressures and intermediate temperatures together with the presence of water are used to convert biomass into liquid biofuels, with the aim of describing the current status and development challenges of the technology. During the hydrothermal liquefaction process, the biomass macromolecules are first hydrolyzed and/or degraded into smaller molecules. Many of the produced molecules are unstable and reactive and can recombine into larger ones. During this process, a substantial part of the oxygen in the biomass is removed by dehydration or decarboxylation. The chemical properties of the product are mostly dependent of the biomass substrate composition. Biomass consists of various components such as carbohydrates, lignin, protein, and fat, and each of them produce distinct groups of compounds when processed individually. When processed together in different ratios, they will most likely cross-influence each other and thus the composition of the product. Processing conditions including temperature, pressure, residence time, catalyst, and type of solvent are important for the bio-oil yield and product quality.

show abstract

Hydrothermal decomposition of xylan as a model substance for plant biomass waste – Hydrothermolysis in subcritical water

Cited by 84 publications

References 35 publications

Hydrothermal production of furfural from xylose and xylan as model compounds for hemicelluloses

Hydrothermal production of furfural from xylose and xylan as model compounds for hemicelluloses

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

Hydrothermal Liquefaction of Biomass

Contact Info

Product

Resources

About