Fractionation and characterization of lignin from sugarcane bagasse using a sulfuric acid catalyzed solvothermal process

Imman, Saksit; Khongchamnan, Punjarat; Wanmolee, Wanwitoo; Laosiripojana, Navadol; Kreetachat, Torpong; Sakulthaew, Chainarong; Chokejaroenrat, Chanat; Suriyachai, Nopparat

doi:10.1039/d1ra03237b

Cited by 20 publications

(13 citation statements)

References 44 publications

(59 reference statements)

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“…Three degradation stages can be identified in the lignin thermogram shown in Figure . The first stage in the temperature ranges from 50 to 220 °C (4 wt % loss), which is associated with the loss of moisture presented in the lignin and some decomposition products with a low molecular weight such as CO, CO 2 , and CH 4 due to the cleavage of the lignin side chains. , The second degradation stage can be attributed to the main degradation of lignin, which takes place between 220 and 350 °C (39 wt % loss) with dTG max at 300 °C. This degradation process involves fragmentation of interunit linkages of monomers and derivatives of phenol into the vapor phase .…”

Section: Resultsmentioning

confidence: 99%

Enhanced Performance of Lignin Recovery with a Carbon Dioxide Acidification Method

2023

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Lignin particles were recovered from the bagasse soda pulping black liquor by acidification with carbon dioxide continuously fed in a semibatch reactor. An experimental model based on the response surface methodology was selected to investigate the effect of parameters and optimize the process for maximizing the lignin yield, and the physicochemical properties of the obtained lignin under the optimum conditions were investigated for further potential applications. A total of 15 experimental runs of three controlled parameters including temperature, pressure, and residence time were carried out based on the Box−Behnken design (BBD). The mathematic model for lignin yield prediction was successfully estimated at 99.7% accuracy. Temperature played a more significant role in lignin yield than pressure and residence time. Higher temperature could faciltate a higher lignin yield. Approximately 85 wt % lignin yield was obtained under the optimum conditions with a purity higher than 90%, high thermal stability, and slightly broad molecular weight distribution. The p-hydroxyphenyl−guaiacyl−syringyl (HGS)-type lignin structure and spherical shape were confirmed by Fourier transform infrared spectroscopy (FTIR) and field emission scanning electron microscopy (FE-SEM). These characteristics confirmed that the obtained lignin could be used in high-value products. Moreover, this work indicated that the CO 2 acidification unit for lignin recovery could be efficiently improved for achieving high yield and purity from black liquor by adjustment of the process.

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Section: Resultsmentioning

confidence: 99%

Enhanced Performance of Lignin Recovery with a Carbon Dioxide Acidification Method

2023

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“…The degree of crystallinity can be derived from various equations. The Segal crystallinity, for example, considers only the cellulose intensity represented by the highest spectrum peak [38]. The Rietveld powder diffraction method, considers the entire biomass crystallinity.…”

Section: Degree Of Crystallinity By Xrdmentioning

confidence: 99%

Sustainable Valorization of Wood Residue for the Production of Biofuel Materials Via Continuous Flow Hydrothermal Liquefaction

Acaru

Abdullah

Lim

2023

Waste Biomass Valor

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Almost half of the wood resulted from mass deforestation for infrastructure and agricultural developments is declared waste. To mitigate the impact and exploit renewable sources of energy sustainably it is paramount to explore their further utilizations. Hydrothermal liquefaction (HTL) technology holds the promise to convert biomass into biofuels. In this study, conversion of wood residue under continuous flow, subcritical HTL was investigated under two conditions; untreated and alkaline pretreated. Results show that 4% NaOH pretreatment increased the production of fermentation sugar, glucose, by 1.8-fold (equivalent to 90 g/L) and facilitated faster recovery times compared to raw wood. Also, at 0.2 MPa HTL, the alkaline pretreatment shifted the hydrolysis of arabinose and cellobiose to rhamnose and increased the fluid's acidity from pH of 6.1 to pH of 3.5. Under the pretreatment, the energy output from glucose reached 246 kJ and the average Net Energy Ratio for glucose during liquefaction reached values as high as 63%. These results will usher in new waste conversion methods into sustainable biofuels via continuous flow HTL, thereby supporting the green energy transition towards net zero.

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“…Specifically, cellulose and hemicellulose are macromolecular polymers linked by sugar units through glycosidic bonds, while lignin is a three-dimensional biological macromolecule composed of a large number of benzene rings. Hemicellulose and lignin are covalently linked to form a complex matrix structure in which cellulose is embedded (Imman et al 2021). Although lignocellulosic biomass is attractive due to its inexpensiveness and abundance as a raw material, it has to be decomposed into individual components in order that it can be effectively treated by specific refining strategies (Zhang et al 2021a).…”

Section: Isolation Of the Lignocellulosic Fractionsmentioning

confidence: 99%

Heterogeneous strategies for selective conversion of lignocellulosic polysaccharides

et al. 2022

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Lignocellulosic biomass is the most abundant renewable carbon resource on earth, for which many efforts have been made to convert it using various chemocatalytic processes. Heterogeneously chemocatalytic conversion conducted based on reusable solid catalysts is the process with the greatest potential studied presently. This review provides insights into the representative achievements in the research area of heterogeneous chemical catalysis technologies for the production of value-added chemicals from lignocellulosic polysaccharides (cellulose and hemicellulose). Popular approaches for the conversion of lignocellulosic polysaccharides into chemicals, including hydrolyzation (glucose, xylose 2 and arabinose), dehydration (5-hydroxymethylfurfuran, furfural and levulinic acid), hydrogenation/hydrogenolysis (sorbitol, mannitol, xylitol, 1,2-propylene glycol, ethlyene glycol and ethanol), selective oxidation (gluconic acid and lactic acid), have been comprehensively reviewed.However, technological barriers still exist, which have to be overcome to further integrate hydrolysis with the refinery processes based on multifunctional solid catalysts, and convert ligncellulosic polysaccharides into value-added fine chemicals. In general, the approaches and technologies are discussed and critically evaluated in terms of the possibilities and potential for further industrial implementation.

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Fractionation and characterization of lignin from sugarcane bagasse using a sulfuric acid catalyzed solvothermal process

Abstract: Conversion of lignocellulosic residue to bioenergy and biofuel is a promising platform for global sustainability.

Cited by 20 publications

References 44 publications

Enhanced Performance of Lignin Recovery with a Carbon Dioxide Acidification Method

Enhanced Performance of Lignin Recovery with a Carbon Dioxide Acidification Method

Sustainable Valorization of Wood Residue for the Production of Biofuel Materials Via Continuous Flow Hydrothermal Liquefaction

Heterogeneous strategies for selective conversion of lignocellulosic polysaccharides

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