Heterogeneous Aspects of Acid Hydrolysis of α-Cellulose

Xiang, Qian; Lee, Y. Y.; Pettersson, Pär O.; Torget, Robert

doi:10.1007/978-1-4612-0057-4_42

Cited by 55 publications

(57 citation statements)

References 8 publications

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“…α-Cellulose (product no. C8002) contained 92.2% glucan and 7.8% xylan, on dry basis, and a broad distribution of the polymerization degree (PD) with the maximum value of 1.5 × 10 3 [23,24] …”

Section: Methodsmentioning

confidence: 99%

Direct conversion of cellulose to α-hydroxy acids (AHAs) over Nb₂O₅-SiO₂-coated magnetic nanoparticles

Candu

Anita

Podolean

et al. 2017

Green Processing and Synthesis

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A series of Nb (3 wt% or 60 wt% Nb 2 O 5 )-based magnetic nanocomposites (Nb-Si@MNP) was prepared by covering the magnetic cores with Nb 2 O 5 -SiO 2 shells using either co-precipitation or sol-gel followed by precipitation methods. These materials were exhaustively characterized through XRD, Raman spectroscopy, CO 2 -and NH 3 -TPD, DRIFT spectroscopy, and TG-DTA, after which the catalytic one-pot conversion of cellulose to valuable α-hydroxy-acids (i.e. lactic and glycolic acids) was investigated. The catalytic performances, expressed in terms of lactic and glycolic acid yields, were directly correlated to the nature of the catalytic sites which, in turn, depended on the niobia content and the preparation route.

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Section: Methodsmentioning

confidence: 99%

Direct conversion of cellulose to α-hydroxy acids (AHAs) over Nb₂O₅-SiO₂-coated magnetic nanoparticles

Candu

Anita

Podolean

et al. 2017

Green Processing and Synthesis

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“…These results are consistent with research carried out using other pretreatment technologies which show that cellulose degradation is significantly enhanced at high temperatures. 48 It has been proposed that this behaviour can be explained by a "breaking temperature" for the disruption of crystalline cellulose. 49 It has been recognised that amorphous cellulose is easier to hydrolyse as water and protons can more easily penetrate into amorphous cellulose regions, causing the cleavage of the β-1,4-glycosidic bonds.…”

Section: Effect Of Intensified [Tea][hso 4 ] Pretreatment On Fractionmentioning

confidence: 99%

Rapid pretreatment of Miscanthus using the low-cost ionic liquid triethylammonium hydrogen sulfate at elevated temperatures

et al. 2018

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Deconstruction with low-cost ionic liquids (ionoSolv) is a promising method to pre-condition lignocellulosic biomass for the production of renewable fuels, materials and chemicals. This study investigated process intensification strategies for ionoSolv pretreatment of Miscanthus × giganteus with the low-cost ionic liquid triethylammonium hydrogen sulfate ([TEA] [HSO 4 ]) in the presence of 20 wt% water, using high temperatures and a high solid to solvent loading of 1 : 5 g/g. The temperatures investigated were 150, 160, 170 and 180°C. We discuss the effect of pretreatment temperature on lignin and hemicellulose removal, cellulose degradation and enzymatic saccharification yields. We report that very good fractionation can be achieved across all investigated temperatures, including an enzymatic saccharification yield exceeding 75% of the theoretical maximum after only 15 min of treatment at 180°C. We further characterised the recovered lignins, which established some tunability of the hydroxyl group content, subunit composition, connectivity and molecular weight distribution in the isolated lignin while maintaining maximum saccharification yield. This drastic reduction of pretreatment time at increased biomass loading without a yield penalty is promising for the development of a commercial ionoSolv pretreatment process.

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“…20,21 In the case of strong hydrochloric acid hydrolysis, it is carried out at evaluated temperatures (60 vs. 100˚C) for various lengths of time (10 -120 min). The results are summarized in a plot for 1-OHP-Gluc and 1-OHP-Sulf, as shown in Fig.…”

Section: Acid Hydrolysis Efficiencymentioning

confidence: 99%

“…Acid hydrolysis is a rapid hydrolysis method used for biological samples, which have been effectively applied for α-cellulose, benzo[a]pyrene tetrol, and DNA-adduct pretreatments in past studies. 20,21 The objective of the present study is to pave the way for the development of a fast, simple, and straightforward method for the analysis of urinary 1-OHP. The method uses acid hydrolysis coupled to SPME for a pretreatment extraction of 1-OHP.…”

Section: Introductionmentioning

confidence: 99%

Determination of 1-Hydroxypyrene in Human Urine by Acid Hydrolysis Coupled to Solid-Phase Microextraction and Semi-microcolumn Liquid Chromatography

Chen

2007

ANAL. SCI.

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Heterogeneous Aspects of Acid Hydrolysis of α-Cellulose

Cited by 55 publications

References 8 publications

Direct conversion of cellulose to α-hydroxy acids (AHAs) over Nb₂O₅-SiO₂-coated magnetic nanoparticles

Direct conversion of cellulose to α-hydroxy acids (AHAs) over Nb₂O₅-SiO₂-coated magnetic nanoparticles

Rapid pretreatment of Miscanthus using the low-cost ionic liquid triethylammonium hydrogen sulfate at elevated temperatures

Determination of 1-Hydroxypyrene in Human Urine by Acid Hydrolysis Coupled to Solid-Phase Microextraction and Semi-microcolumn Liquid Chromatography

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Heterogeneous Aspects of Acid Hydrolysis of α-Cellulose

Cited by 55 publications

References 8 publications

Direct conversion of cellulose to α-hydroxy acids (AHAs) over Nb2O5-SiO2-coated magnetic nanoparticles

Direct conversion of cellulose to α-hydroxy acids (AHAs) over Nb2O5-SiO2-coated magnetic nanoparticles

Rapid pretreatment of Miscanthus using the low-cost ionic liquid triethylammonium hydrogen sulfate at elevated temperatures

Determination of 1-Hydroxypyrene in Human Urine by Acid Hydrolysis Coupled to Solid-Phase Microextraction and Semi-microcolumn Liquid Chromatography

Contact Info

Product

Resources

About

Direct conversion of cellulose to α-hydroxy acids (AHAs) over Nb₂O₅-SiO₂-coated magnetic nanoparticles

Direct conversion of cellulose to α-hydroxy acids (AHAs) over Nb₂O₅-SiO₂-coated magnetic nanoparticles