Effect of hydrothermal pretreatment on the demineralization and thermal degradation behavior of eucalyptus

Ge, Jiayan; Wu, Yuting; Han, Yushan; Qin, Chengrong; Nie, Shuangxi; Liu, Shijie; Wang, Shuangfei; Yao, Shuangquan

doi:10.1016/j.biortech.2020.123246

Cited by 51 publications

(31 citation statements)

References 43 publications

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“…Hydrothermal pretreatment is one of the main physical pretreatment methods (Zhuang et al 2016;Goldmann et al 2017). It has the advantages of low energy consumption, low requirement for chemical substances, little influence on physicochemical structure, and high recovery rate of hemicellulose (Yao et al 2015(Yao et al , 2017Ge et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Effect of pH on hemicellulose extraction and physicochemical characteristics of solids during hydrothermal pretreatment of eucalyptus

Yang

Cao

et al. 2020

BioRes

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The effects of pH on residual solids (RS), total dissolved solids (TDS), carbohydrates, and lignin in eucalyptus during hydrothermal pretreatment were studied. The balance between RS and TDS was obtained at pH 4.0 in hydrothermal pretreatment with pre-adjustment pH. The yield of hemicellulose increased, and oligosaccharides dominated. Hemicellulose had the highest dissolution rate, and cellulose and lignin had the lowest dissolution rate at pH 4.0. The crystallinity index (CrI) and structural transformation of lignin was analyzed by X-ray diffraction (XRD) and nuclear magnetic resonance spectroscopy (NMR) with or without pretreatment. The CrI at pH 4.0 was 64.2% higher than that with the traditional hydrothermal pretreatment (62.1%). The β-O-4 bonds, OMe, and phenylcoumarane of lignin were protected. The highest hemicellulose extraction and minimal physicochemical structural changes were obtained at pH 4.0.

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Section: Introductionmentioning

confidence: 99%

Effect of pH on hemicellulose extraction and physicochemical characteristics of solids during hydrothermal pretreatment of eucalyptus

Yang

Cao

et al. 2020

BioRes

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“…The particle size distribution and average diameter of various samples were calculated. The thermal stability of the fibre was analysed by TGA (STA 449 F5, NETZSCH, Germany) [22]. First, the fibre sample was dried for 6 h and passed through a freeze dryer (Labconco, Kansas City, MO, USA).…”

Section: Physico-chemical Properties Of Nanocellulose Filamentsmentioning

confidence: 99%

Effect ofp-TsOH pretreatment on separation of bagasse components and preparation of nanocellulose filaments

Feng

Wei

et al. 2020

R. Soc. open sci.

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The efficient separation of bagasse components was achieved by p -toluenesulfonic acid ( p -TsOH) pretreatment. The effects of p -TsOH dosage, reaction temperature and reaction time on cellulose, hemicellulose and lignin contents were studied. Eighty-five per cent of lignin was dissolved, whereas the cellulose loss was minimal (less than 8.1%). Cellulose-rich water-insoluble residual solids were obtained. The degree of polymerization of cellulose decreased slightly, but the crystallinity index (CrI) increased from 52.0% to 68.1%. It indicated that the highly efficient delignification of bagasse was achieved by p -TsOH pretreatment. The nanocellulose filaments (CNFs) were produced by the treated samples. The physico-chemical properties of CNFs were characterized by transmission electron microscopy and thermogravimetric analysis. The results show that the CNFs have smaller average size and higher thermal stability. It provides a new method for CNFs.

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“…Therefore, these waste materials are likely to be a feasible option to produce activated carbon. Eucalyptus wood waste is an abundant waste material from the wood industry, which is being used in many areas, such as briquette fuel 1 , torrefied solid fuel 2 , sugar, gasoline 3 , or biooil 4 and electrode materials in supercapacitors 5 . Normally, the activated carbon production has two stages.…”

Section: Introductionmentioning

confidence: 99%

Activated carbon preparation from eucalyptus wood chips using continuous carbonization–steam activation process in a batch intermittent rotary kiln

Mopoung

Dejang

2021

Sci Rep

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The production of activated carbon from eucalyptus wood chips by steam activation in a 2000 kg batch intermittent rotary kiln with continuous carbonization–steam activation process conducted at 500 °C to 700 °C was studied. The activated carbon products were characterized by FTIR, SEM–EDS, Raman spectroscopy, and BET analysis. Percent yields, iodine number, and methylene blue number of the produced activated carbon materials were measured as well. It was shown that the percent yields of the activated carbon materials made in the temperature range from 500 to 700 °C are 21.63 ± 1.52%–31.79 ± 0.70% with capacities of 518–737 mg I2/g and 70.11–96.93 mg methylene blue/g. The BET surface area and micropore volume of the activated carbons are 426.8125–870.4732 m2/g and 0.102390–0.215473 cm3/g, respectively. The steam used in the process could create various oxygen containing surface functional groups such as –CO and –COC groups. In addition, it could also increase the amorphous nature of the activated carbon product. These properties of the activated carbon products are increased with increasing steam activation temperature from 500 to 700 °C. As a result, the activated carbon materials produced at activation temperatures of 600 °C and 700 °C exhibit higher adsorption.

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Effect of hydrothermal pretreatment on the demineralization and thermal degradation behavior of eucalyptus

Cited by 51 publications

References 43 publications

Effect of pH on hemicellulose extraction and physicochemical characteristics of solids during hydrothermal pretreatment of eucalyptus

Effect of pH on hemicellulose extraction and physicochemical characteristics of solids during hydrothermal pretreatment of eucalyptus

Effect ofp-TsOH pretreatment on separation of bagasse components and preparation of nanocellulose filaments

Activated carbon preparation from eucalyptus wood chips using continuous carbonization–steam activation process in a batch intermittent rotary kiln

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