Ozonolysis

Travaini, Rodolfo; Marangon-Jardim, C.; Colodette, Jorge Luiz; Morales-Otero, M.; Bolado, Silvia

doi:10.1016/b978-0-12-800080-9.00007-4

Cited by 20 publications

(14 citation statements)

References 61 publications

(219 reference statements)

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“…Ozone converts acid insoluble lignin (AIL) into acid soluble lignin (ASL) and low molecular weight compounds, mainly the carboxylic acids oxalic, formic and acetic. Lignin removal increases enzymes accessibility to polysaccharides and sugar release (Travaini et al, 2015). Among the many advantages of ozonolysis on other pretreatments, these can be highlighted: high saccharification yields; low inhibitory compounds formation; the process occurs at ambient pressure and temperature; a single solid phase is generated, avoiding problems related to products dilution; ozone can be generated in situ and residual ozone can be easily destroyed, preventing environmental problems (Travaini et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Saccharification of ozonated sugarcane bagasse using enzymes from Myceliophthora thermophila JCP 1-4 for sugars release and ethanol production

Pereira

Travaini

Marques

et al. 2016

Bioresource Technology

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The saccharification of ozonated sugarcane bagasse (SCB) by enzymes from Myceliophthora thermophila JCP 1-4 was studied. Fungal enzymes provided slightly higher sugar release than commercial enzymes, working at 50°C. Sugar release increased with temperature increase. Kinetic studies showed remarkable glucose release (4.99 g/L, 3%w/w dry matter) at 60°C, 8 h of hydrolysis, using an enzyme load of 10 FPU (filter paper unit). FPase and β-glucosidase activities increased during saccharification (284% and 270%, respectively). No further significant improvement on glucose release was observed increasing the enzyme load above 7.5 FPU per g of cellulose. Higher dry matter contents increased sugars release, but not yields. The fermentation of hydrolysates by Saccharomyces cerevisiae provided glucose-to-ethanol conversions around to 63%.

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Section: Introductionmentioning

confidence: 99%

Saccharification of ozonated sugarcane bagasse using enzymes from Myceliophthora thermophila JCP 1-4 for sugars release and ethanol production

Pereira

Travaini

Marques

et al. 2016

Bioresource Technology

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“…The radicals react with D-glucose by means of hydrogen abstraction that forms an intermediate glucose species with a carbon centered radical. This is followed by oxygenation of the subsequent intermediate by releasing a carbonyl group which forms gluconolactone N.J. Cory et al [46]. Hydration of the gluconolactone species results in the reversible gluconic-acid/gluconolactone system.…”

Section: Photoelectrochemical Behaviormentioning

confidence: 99%

Electrodeposited CuO thin film for wide linear range photoelectrochemical glucose sensing

Cory

Visser

Chamier

et al. 2022

Applied Surface Science

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“…For the future production of renewable aromatic chemical commodities, lignin is the only significant aromatic source available capable of supplementing global chemical demand. Low molecular weight lignin fragment products are currently produced in vast quantities as a byproduct of biorefineries and paper pulping industries. , The majority of these residues is combusted to recover heat energy as the highly stable, amorphous structure of lignin is resistant toward decomposition and degradation . Developing processes able to overcome these barriers could allow for the renewable production of valuable aromatic chemical commodities from lignin, including o -cresol, guaiacol, catechol, and vanillin, shifting reliance away from fossil resources. − …”

Section: Introductionmentioning

confidence: 99%

Reaction Analysis of Diaryl Ether Decomposition under Hydrothermal Conditions

Alam

Lui

Yuen

et al. 2018

Ind. Eng. Chem. Res.

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The reactivity and decomposition pathway of models for α-O-4 and β-O-4 linkages, found within lignin, have been examined using methoxy-substituted (−OCH3) and -unsubstituted (−H) aryl groups under hydrothermal conditions. α-O-4 model compounds readily underwent conversion at comparatively mild temperatures (140–300 °C) and short reaction times (5–80 min), in contrast with the β-O-4 containing model compounds which required temperatures up to 340 °C and longer reaction times up to 240 min. Pseudo-first-order rate constants and apparent activation energies were calculated for hydrothermal conversion of the model compounds based on experimental data. The cleavage of these linkages proceeded via hydrolysis and direct elimination pathways, with the resulting products prone to undergoing further reactions including condensation, and dehydration. The presence of methoxy functionalities on the aromatic rings was found to destabilize both the α-O-4 and β-O-4 ether linkages, decreasing the temperature and reaction times required to decompose them under hydrothermal conditions. In addition, the methoxy substituents were partially hydrolyzed under hydrothermal conditions at temperatures exceeding 280 °C, resulting in a number of substituted guaiacol products.

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Ozonolysis

Cited by 20 publications

References 61 publications

Saccharification of ozonated sugarcane bagasse using enzymes from Myceliophthora thermophila JCP 1-4 for sugars release and ethanol production

Saccharification of ozonated sugarcane bagasse using enzymes from Myceliophthora thermophila JCP 1-4 for sugars release and ethanol production

Electrodeposited CuO thin film for wide linear range photoelectrochemical glucose sensing

Reaction Analysis of Diaryl Ether Decomposition under Hydrothermal Conditions

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