Influence of acid prehydrolysis on the process of wood oxidation into vanillin and pulp

Tarabanko, Valery E.; Kaygorodov, Konstantin L.; Vigul, Dmitry O.; Tarabanko, Nikolay; Chelbina, Yulia V.; Смирнова, М. Н.

doi:10.1080/02773813.2020.1835984

Cited by 14 publications

(13 citation statements)

References 29 publications

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“…CO 2 might be a promising alternative for SO 2 in practical production. The consumption of NaOH was likely caused by the formation of small acids, while most acids were generated from the oxidation of hemicellulose . Therefore, the removal of hemicellulose from biomass can reduce the consumption of NaOH if the fractionation process has no significant change in the lignin structure.…”

Section: Resultsmentioning

confidence: 99%

Oxidative Catalytic Fractionation of Lignocellulose to High-Yield Aromatic Aldehyde Monomers and Pure Cellulose

Zhu,

Liao,

et al. 2023

ACS Catal.

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Facile oxidation is a promising technology to valorize lignocellulosic biomass toward high-value chemicals and cellulose. However, the carbon efficiency is restricted by inevitable dissolution and conversion of carbohydrates and the condensation and degradation of lignin and monophenolics. Herein, we report the use of CuO nanoparticles (NPs) to oxidatively fractionate lignocellulose with O2 in aqueous NaOH under mild conditions, achieving over 80% carbon efficiency. Lignin was converted to aromatic aldehyde monomers (up to 48.6 wt %, mainly vanillin and syringaldehyde), and the yield can surpass the theoretical value (on the basis of the β-O-4 bond content) due to cleavage of other bonds. This was proven by several model compounds with different interlinkages. All hemicelluloses were transformed toward water-soluble small acids (mainly oxalic acid). As it was protected by the complexation of Cu cations, up to 80% cellulose was obtained as a white crystalline residue with high purity (>95%), which has potential applications in the production of materials and chemicals.

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Section: Resultsmentioning

confidence: 99%

Oxidative Catalytic Fractionation of Lignocellulose to High-Yield Aromatic Aldehyde Monomers and Pure Cellulose

Zhu,

Liao,

et al. 2023

ACS Catal.

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“…The number of research papers in the field of oxidation of lignins to vanillin has increased 10-fold over the past 20 years, and their citation has increased 20-fold. The selectivity of the catalytic oxidation of native lignins to vanillin has come close to the theoretical limit, i.e., the selectivity of nitrobenzene oxidation [2,3]. Thus, the "Lignin first" approach [1] becomes quite productive to obtain the individual compounds by both hydrogenation and oxidation methods.…”

mentioning

confidence: 92%

“…The properties of native and technical lignins differ greatly: the latter, as a general rule, are highly condensed under harsh conditions of chemical processing wood. For this reason, native lignins are more suitable than technical ones for the production of monomeric phenols, and this conclusion is formulated in two words "Lignin first" [1], which determine the current trends in the development of lignin processing processes [2,3]. Native wood lignins, however, are more expensive compared to lignosulfonates or Kraft lignins, and in some cases, this balances the disadvantages of native and technical lignins.…”

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confidence: 99%

Catalytic Conversion of Lignins for Valuable Chemicals

Tarabanko

2021

Catalysts

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“…13 Wood cell walls contain cellulose, a homopolymer of 1,4-linked glucose units, hemicelluloses (glucans, xylans, mannans), and polyphenols (lignins). 14 Porous wood could be an effective sound absorber. Wood porosity could be determined using air permeability, pore size, and open-pore contents.…”

Section: Introductionmentioning

confidence: 99%

“…Wood cell walls contain cellulose, a homopolymer of 1,4‐linked glucose units, hemicelluloses (glucans, xylans, mannans), and polyphenols (lignins) 14 . Porous wood could be an effective sound absorber.…”

Section: Introductionmentioning

confidence: 99%

Effects of ammonium persulfate on coconut wood (Cocos nucifera L.) cellulose, hemicellulose, and lignin polymers: Improved sound absorption capacity

Kolya

Jang

Hashitsume

et al. 2022

J of Applied Polymer Sci

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The rational design of sound absorption boards made of wood materials is an attractive field of research. This article describes a simple and low‐cost ammonium persulfate treatment on coconut wood cell walls (Cocos nucifera L.). Reaction parameters such as concentration of reactant and reaction time were optimized. The results of different instrumental characterization such as X‐ray photoelectron spectroscopy, X‐ray diffraction, attenuated total reflectance–Fourier transforms infrared spectroscopy, and scanning electron microscope supports the chemical alterations of the wood cell wall. The quantitative analysis of hemicellulose, cellulose, and lignin was performed. The significant changes in cell‐walls enhanced average sound absorption coefficient at each frequency range: 60.4% at 500–1000 Hz (t = −10.593 and p < 0.001), 80.8% at 1000–2000 Hz (t = −4.798 and p < 0.001), 96.2% at 2000–4000 Hz (t = −58.527 and p < 0.001) and 83.0% at 500–64000 Hz (t = −51.261 and p < 0.001). It is due to the increment of gas permeability (288.3%, p = <0.001). These results could be beneficial for new research on wood‐based sound absorption materials to regulate the acoustic environment in houses.

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Influence of acid prehydrolysis on the process of wood oxidation into vanillin and pulp

Cited by 14 publications

References 29 publications

Oxidative Catalytic Fractionation of Lignocellulose to High-Yield Aromatic Aldehyde Monomers and Pure Cellulose

Oxidative Catalytic Fractionation of Lignocellulose to High-Yield Aromatic Aldehyde Monomers and Pure Cellulose

Catalytic Conversion of Lignins for Valuable Chemicals

Effects of ammonium persulfate on coconut wood (Cocos nucifera L.) cellulose, hemicellulose, and lignin polymers: Improved sound absorption capacity

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