Influence of typical pretreatment on cotton stalk conversion activity and bio-oil property during low temperature (180–220 ℃) hydrothermal process

Zhang, Libo; Yang, Xiao; Sheng, Yequan; Huang, Qiguang; Yang, Zhilin; Shi, Yang; Guo, Xuqiang; Ge, Shengbo

doi:10.1016/j.fuel.2022.125250

Cited by 9 publications

(5 citation statements)

References 33 publications

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“…Post-treatment, these bands were significantly diminished or absent, indicating the substantial removal of the acetyl group and hemicellulose during the pretreatment process, a finding corroborated by our compositional analysis (Table 4). Furthermore, there were significant alterations in the band intensities at 1515, 1596, and 1355 cm −1 , which are linked to the C-H out-of-plane vibration and aromatic skeletal vibrations of lignin [30,31]. The pretreated solids exhibited reduced signals at these bands compared to untreated MDF, with notably weaker band intensities in NaOH-and AAI-pretreated solids due to the reduced lignin content.…”

Section: Chemical Structure Analysismentioning

confidence: 96%

“…Furthermore, there were significant alterations in the band intensities at 1515, 1596, and 1355 cm −1 , which are linked to the C-H out-of-plane vibration and aromatic skeletal vibrations of lignin [30,31]. The pretreated solids exhibited reduced signals at these bands compared to untreated MDF, with notably weaker band intensities in NaOH-and AAI-pretreated solids due to the reduced lignin content.…”

Section: Chemical Structure Analysismentioning

confidence: 96%

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Efficacy and Functional Mechanisms of a Two-Stage Pretreatment Approach Based on Alkali and Ionic Liquid for Bioconversion of Waste Medium-Density Fiberboard

Wang,

Hou,

Sun

et al. 2024

Molecules

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A novel pretreatment strategy utilizing a combination of NaOH and 1-Butyl-3-methylimidazolium chloride ([Bmim]Cl) was proposed to enhance the enzymatic hydrolysis of abandoned Medium-density fiberboard (MDF). The synergistic effect of NaOH and [Bmim]Cl pretreatment significantly improved the glucose yield, reaching 445.8 mg/g within 72 h, which was 5.04 times higher than that of the untreated samples. The working mechanism was elucidated according to chemical composition, as well as FTIR, 13C NMR, XRD, and SEM analyses. The combined effects of NaOH and [Bmim]Cl led to lignin degradation, hemicellulose removal, the destruction and erosion of crystalline regions, pores, and an irregular microscopic morphology. In addition, by comparing the enzymatic hydrolysis sugar yield and elemental nitrogen content of untreated MDF samples, eucalyptus, and hot mill fibers (HMF), it was demonstrated that the presence of adhesives and additives in waste MDF significantly influences its hydrolysis process. The sugar yield of untreated MDF samples (88.5 mg/g) was compared with those subjected to hydrothermal pretreatment (183.2 mg/g), Ionic liquid (IL) pretreatment (406.1 mg/g), and microwave-assisted ionic liquid pretreatment (MWI) (281.3 mg/g). A long water bath pretreatment can reduce the effect of adhesives and additives on the enzymatic hydrolysis of waste MDF. The sugar yield produced by the combined pretreatment proposed in this study and the removal ability of adhesives and additives highlight the great potential of our pretreatment technology in the recycling of waste fiberboard.

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Section: Chemical Structure Analysismentioning

confidence: 96%

Section: Chemical Structure Analysismentioning

confidence: 96%

Efficacy and Functional Mechanisms of a Two-Stage Pretreatment Approach Based on Alkali and Ionic Liquid for Bioconversion of Waste Medium-Density Fiberboard

Wang,

Hou,

Sun

et al. 2024

Molecules

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“…Biocomposites prepared with the use of a filler in the form of plant fibers and a biopolymer matrix can be one of the methods of reducing production costs and obtaining the appropriate properties while maintaining full biodegradation [ 35 ]. The current trend related to counteracting the problem of management of petrochemical plastic waste prompts the development of modern polymer materials [ 36 , 37 , 38 , 39 , 40 ], whose properties are initially unknown. An example of this can be the poly [(3-hydroxybutyrate)-co-(3-hydroxyvalerate)]—(PHBV)-hemp fiber (PHBV-hemp fiber) biocomposite, which is characterized by its natural origin and the possibility of full biodegradation [ 41 , 42 , 43 ].…”

Section: Introductionmentioning

confidence: 99%

The Mechanical Properties Prediction of Poly [(3-hydroxybutyrate)-co-(3-hydroxyvalerate)] (PHBV) Biocomposites on a Chosen Example

2022

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This paper aims to experimentally determine the properties of the poly [(3-hydroxybutyrate)-co-(3-hydroxyvalerate)]—(PHBV)—30% hemp fiber biocomposite, which is important in terms of numerical simulations of product manufacturing, and to evaluate the mechanical properties by means of micromechanical modeling. The biocomposite was manufactured using a single-screw extruder. Specimens for testing were produced by applying the injection molding technology. Utilizing the simulation results of the plastic flow, carried out by the Moldflow Insight 2016 commercial software and the results of experimental tests, the forecasts of selected composite mechanical properties were performed by means of both numerical and analytical homogenization methods. For this purpose, the Digimat software was applied. The necessary experimental data to perform the calculations for the polymer matrix, fibers, and the biocomposite were obtained by rheological and thermal studies as well as elementary mechanical tests. In the paper, the method of determining selected properties of the biocomposite and the method of forecasting its other properties are discussed. It shows the dependence of the predicted, selected properties of the biocomposite on the filler geometry assumed in the calculations and the homogenization method adopted for the calculations. The results of the work allow for the prediction of properties of the PHBV biocomposites—hemp fiber for any amount of filler used. Moreover, the results allow for the estimation of the usefulness of homogenization methods for the prediction of properties of the PHBV-hemp fiber biocomposites. Furthermore, it was found that for the developed and tested biocomposites, the most effective possibility of mechanical properties prediction is using the Mori-Tanaka homogenization model, which unfortunately has some limitations.

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“…Our previous work has provided a major summary of the existing studies on the effects of raw materials and their structures in lignocellulose on hydro-thermal bio-oils [ 19 ]. Given the influence of raw material structure on hydro-thermal bio-oil, various pre-treatment methods were used to change the structural characteristics of cotton stalk, effectively improve the conversion activity of cotton stalk under low temperatures of hydro-thermal (180–220 °C), and improve the combustion performance and composition of hydro-thermal bio-oil [ 20 ]. However, how the interaction between the material composition of hydro-thermal bio-oil affects our current research is still unclear, but the existing binary blend system research is still in the form of pyrolysis; on discussion and analysis, the temperature range is 100~800 °C, although it can confirm the interaction between every single component, describing hydro-thermal liquefaction (HTL) in the process of cellulose.…”

Section: Introductionmentioning

confidence: 99%

Components Interaction of Cotton Stalk under Low-Temperature Hydrothermal Conversion: A Bio-Oil Pyrolysis Behavior Perspective Analysis

Yang

Chen

et al. 2022

Polymers

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The conversion of agricultural and forestry waste biomass materials into bio-oil by mild hydro-thermal technology has a positive effect on extending the agricultural industry chain and alleviating the world energy crisis. The interaction investigation of biomass components during bio-oil formation can be significant for the efficient conversion of lignocellulose when different raw materials are fed together. In this paper, a bio-oil pyrolysis behavior (thermogravimetric analysis, TG) perspective component interaction investigation of cotton stalks under low-temperature hydro-thermal conversion (220 °C) was studied. Cellulose, hemi-cellulose, lignin, and protein were used as lignocellulose model components, by their simple binary blending and multi-variate blending and combined with thermo-gravimetric analysis and gas chromatography-mass spectrometry (GC-MS) characterization and analysis. The interaction of different model components and real biomass raw material components in the hydro-thermal process was explored. Results showed that the components of hydro-thermal bio-oil from cotton stalks were highly correlated with the interactions between cellulose, hemi-cellulose, lignin, and protein. During the hydro-thermal process, cellulose and hemi-cellulose inhibit each other, which reduces the content of ketones, aldehydes, ethers, and alcohols in bio-oil. Interaction between cellulose and lignin was obvious, which promotes the formation of oligomers, such as ketones, aldehydes, esters, phenols, and aliphatic, while inhibiting the production of aromatic and multi-hybrid compounds. Otherwise, there was no obvious interaction effect between hemi-cellulose and lignin or between lignin and protein. This research will guide the industrialization of lignocellulose, especially the possible co-feed hydro-thermal conversion technology.

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Influence of typical pretreatment on cotton stalk conversion activity and bio-oil property during low temperature (180–220 ℃) hydrothermal process

Cited by 9 publications

References 33 publications

Efficacy and Functional Mechanisms of a Two-Stage Pretreatment Approach Based on Alkali and Ionic Liquid for Bioconversion of Waste Medium-Density Fiberboard

Efficacy and Functional Mechanisms of a Two-Stage Pretreatment Approach Based on Alkali and Ionic Liquid for Bioconversion of Waste Medium-Density Fiberboard

The Mechanical Properties Prediction of Poly [(3-hydroxybutyrate)-co-(3-hydroxyvalerate)] (PHBV) Biocomposites on a Chosen Example

Components Interaction of Cotton Stalk under Low-Temperature Hydrothermal Conversion: A Bio-Oil Pyrolysis Behavior Perspective Analysis

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