Efficient extraction and characterization of polymeric hemicelluloses from hybrid poplar

Hua, Jiang; Chen, Qingqing; Ge, Jianhong; Zhang, Yang

doi:10.1016/j.carbpol.2013.10.030

Cited by 36 publications

(23 citation statements)

References 33 publications

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“…4)-glucosidic linkages [29]. In addition, there was still *20 % solid residue left at 900°C, which was in consistence with the data reported by Yang et al [30]. As shown from the DTA curves, the pyrolysis of pretreated hemicelluloses was mainly exothermal process.…”

Section: Effects Of C-irradiation Pretreatment On the Thermal Stabilisupporting

confidence: 88%

Structure, Morphology, Thermostability and Irradiation-Mediated Degradation Fractions of Hemicellulose Treated with γ-Irradiation

Chen

Wang

et al. 2016

Waste Biomass Valor

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To elucidate the physicochemical properties and degradation mechanism of hemicellulose treated with irradiation doses (from 0 to 1200 kGy), a set of experiments on hemicellulose morphology, structure, molecular weight, free radicals, thermal stability, and irradiation mediated fractions was performed. Fourier transforms infrared spectroscopy and nuclear magnetic resonance analyses show that irradiation destroys the inter-and intra-molecular hydrogen bonds of hemicellulose leading to the generation of reductive carbonyl group. Scanning electron microscope, electron paramagnetic resonance and gel permeation chromatography measurements further confirm that the damage degree of hemicellulose structure and morphology surface in dependence on irradiation doses. Thermogravimetry/differential thermogravimetry analyses indicate that the activated energy and thermal stability of irradiated hemicellulose decrease with the increasing of absorbed dose. Irradiation mediated degradation compounds analyses by ion chromatography reveal that xylose (7.64 ± 0.92 mg g -1 ), and arabionose (3.58 ± 0.08 mg g -1 ) and cellubiose (0.27 ± 0.00 mg g -1 ) are observed at 1200 kGy. Amount of glucuronic acid (3.61 ± 0.02 mg g -1 ) and galacturonic acid (7.44 ± 0.38 mg g -1 ), which are respectively derived from glucose and galactose, are also obtained in the water soluble irradiation mediated degradation fraction. These data provide a basis support on a full utilization of hemicellulose after c-irradiation pretreatment.

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Section: Effects Of C-irradiation Pretreatment On the Thermal Stabilisupporting

confidence: 88%

Structure, Morphology, Thermostability and Irradiation-Mediated Degradation Fractions of Hemicellulose Treated with γ-Irradiation

Chen

Wang

et al. 2016

Waste Biomass Valor

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“…The ground wood sample was treated with 8% NaOH solution at 90°C for 10 h using the ratio of liquid to solid of 20, and then the slurry was filtered and washed to pH 7. All filtrate fractions were pooled for the recovery of hemicelluloses (Jiang et al, 2014). The solid fraction was dried at 40°C under vacuum for 24 h. The dried solid sample, hybrid poplar with poor residual hemicelluloses (HPPRH), was sealed in a zipper-lock plastic bag and kept in a 4°C refrigerator until use.…”

Section: Methodsmentioning

confidence: 99%

“…The extracted hemicelluloses may be used as higher added-value chemicals (Sedlmeyer, 2011). Therefore, its residue (HPPRH) was chosen as the starting material in this study after the alkali-extraction of hemicelluloses from hybrid poplar (Jiang et al, 2014). The solid fraction is rich in cellulose with some lignin and poor residual hemicelluloses, so it would be a better choice to http://dx.doi.org/10.1016/j.biortech.2014.12.103 0960-8524/Ó 2015 Elsevier Ltd. All rights reserved.…”

Section: Introductionmentioning

confidence: 99%

Enhancement in the enzymatic digestibility of hybrid poplar with poor residual hemicelluloses after Na2SO3 pretreatment

Hua

Han

2015

Bioresource Technology

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“…The difference between acidic and alkaline hydrolysis lies in the nature of the extracted carbohydrates (De Lopez et al 1996). Whereas the acidic hydrolysis conditions often produce significant amounts of monosaccharides from LCMs, the extraction under alkaline conditions produces oligosaccharides and polysaccharides (Jiang et al 2014;Alén 2013, 2015a). Furthermore, carbohydrates are susceptible to further degradation under alkaline conditions, leading to significant formation (up to 60-70% of the dissolved organic material) Alén 2013, 2015a) of various degradation products, such as monocarboxylic and dicarboxylic hydroxy acids, together with volatile acids, such as acetic and formic acids (Niemelä 1990a,b;Sjöström 1991).…”

Section: Alkaline Pretreatmentsmentioning

confidence: 99%

Chemical Pretreatments of Wood Chips Prior to Alkaline Pulping - A Review of Pretreatment Alternatives, Chemical Aspects of the Resulting Liquors, and Pulping Outcomes

Lehto

Alén

2015

BioResources

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The chemical industry is being forced to evaluate new strategies for more effective utilization of renewable feedstocks to diminish the use of fossil resources. In this literature review, the integration of both acidic and alkaline pretreatment phases of hardwood and softwood chips with chemical pulping is discussed. Depending on the pretreatment conditions, high-volume sulfur-free fractions with varying chemical compositions can be produced. In case of acidic pretreatments, the major products include carbohydrates (mono-, oligo-, and polysaccharides), whereas under alkaline (i.e., aqueous NaOH) pretreatment conditions, the sulfur-free fractions of aliphatic carboxylic acids, lignin, and extractives are primarily obtained. All these fractions are potentially interesting groups of compounds and can be used in a number of applications. Finally, the effects of pretreatments on pulping are also considered. Although it is believed that there are important advantages to be gained by integrating this type of renewable raw material-based production, in particular, with kraft pulping, sulfur-free pulping methods such as soda-AQ and oxygen/alkali delignification processes are also briefly discussed.

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Efficient extraction and characterization of polymeric hemicelluloses from hybrid poplar

Cited by 36 publications

References 33 publications

Structure, Morphology, Thermostability and Irradiation-Mediated Degradation Fractions of Hemicellulose Treated with γ-Irradiation

Structure, Morphology, Thermostability and Irradiation-Mediated Degradation Fractions of Hemicellulose Treated with γ-Irradiation

Enhancement in the enzymatic digestibility of hybrid poplar with poor residual hemicelluloses after Na2SO3 pretreatment

Chemical Pretreatments of Wood Chips Prior to Alkaline Pulping - A Review of Pretreatment Alternatives, Chemical Aspects of the Resulting Liquors, and Pulping Outcomes

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