The cornerstone of realizing lignin value-addition: Exploiting the native structure and properties of lignin by extraction methods

Huang, Danlian; Li, Ruijin; Xu, Piao; Li, Tao; Deng, Rui; Chen, Sha; Zhang, Qing

doi:10.1016/j.cej.2020.126237

Cited by 112 publications

(83 citation statements)

References 197 publications

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“…However, some works reflected the chance of employing this kind of lignin for several purposes. Some applications, via a further upgrading of the lignin, may be its use as an adsorbent for heavy metal such as Pd or Cr [47] in the form of lignin nanoparticles, as well as for the manufacture of polymeric resins, polyurethanes and polyesters [48,49]. In addition, this lignin may also be used as a flocculant, cement additive, etc.…”

Section: High Added-value Applications For Ligninmentioning

confidence: 99%

“…In addition, this lignin may also be used as a flocculant, cement additive, etc. On the other hand, if the lignin is employed for consequent catalytic depolymerization, it can be subjected to pyrolysis or other kinds of treatment for the production of aromatic monomers, or for the obtainment of biofuels [47]. All of these may be attractive applications for the exploitation of lignin.…”

Section: High Added-value Applications For Ligninmentioning

confidence: 99%

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Formosolv Pretreatment to Fractionate Paulownia Wood Following a Biorefinery Approach: Isolation and Characterization of the Lignin Fraction

Domínguez¹,

Río

Romaní

et al. 2020

Agronomy

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Paulownia is a rapid-growth tree with a high biomass production rate per year and low demand of water, which make it very suitable for intercropping systems, as it protects the crops from adverse climatic conditions, benefiting the harvest yields. Moreover, these characteristics make Paulownia a suitable raw material able to be fractionated in an integrated biorefinery scheme to obtain multiple products using a cascade conversion approach. Different delignification pretreatments of biomass have been purposed as a first stage of a lignocellulosic biorefinery. In this study, the formosolv delignification of Paulownia wood was investigated using a second order face-centered factorial design to assess the effects of the independent variables (concentrations of formic and hydrochloric acids and reaction time) on the fractionation of Paulownia wood. The maximum delignification achieved in this study (78.5%) was obtained under following conditions: 60 min, and 95% and 0.05% formic and hydrochloric acid, respectively. In addition, the remained solid phases were analyzed to determine their cellulose content and cooking liquors were also chemically analyzed and characterized. Finally, the recovered lignin by precipitation from formosolv liquor and the pristine lignin (milled wood lignin) in Paulownia wood were characterized and compared by the following techniques FTIR, NMR, high-performance size-exclusion chromatography (HPSEC) and TGA. This complete characterization allowed verifying the capacity of the formosolv process to act on the lignin, causing changes in its structure, which included both phenomena of depolymerization and condensation.

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Section: High Added-value Applications For Ligninmentioning

confidence: 99%

Section: High Added-value Applications For Ligninmentioning

confidence: 99%

Formosolv Pretreatment to Fractionate Paulownia Wood Following a Biorefinery Approach: Isolation and Characterization of the Lignin Fraction

Domínguez¹,

Río

Romaní

et al. 2020

Agronomy

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“…The lignin extraction efficiency varies depending on the method used and can range from 15 to 70% when optimised. 25 The optimisation of the extraction process has not been the focus of this study. Upon irradiation we observed a change of colour of the reaction solution.…”

Section: Lignin and Extractives In Sawdustmentioning

confidence: 99%

‘Lignin and extractives first’ conversion of lignocellulosic residual streams using UV light from LEDs

et al. 2021

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“…They are being extracted from a variety of sources, and large-scale production predominantly arises from the bioethanol and xylose/furfural industries [ 3 , 4 ]. Ironically, around 98% of lignin from the paper and/or pulp industries is being burned, considering it a waste by-product and non-optimized energy resource [ 5 , 6 ]. However, a plethora of applications could be envisioned from lignins, for example, in the synthesis of polymers, dyes and fertilizers, as well as as adhesives in ecological and low-carbon plywood [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

Lignin Nanoparticles and Alginate Gel Beads: Preparation, Characterization and Removal of Methylene Blue

et al. 2022

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A novel and effective green system consisting of deep eutectic solvent (DES) was proposed to prepare lignin nanoparticles (LNPs) without any lignin modification. The LNPs are obtained through the dialysis of the kraft lignin-DES solution. The particle size distribution, Zeta potential and morphology of the LNPs are characterized by using dynamic light scattering (DLS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The average diameter of LNPs is in the range 123.6 to 140.7 nm, and the LNPs show good stability and dispersibility in water. The composite beads composed of LNPs and sodium alginate (SA) are highly efficient (97.1%) at removing methylene blue (MB) from the aqueous solution compared to 82.9% and 77.4% by the SA/bulk kraft lignin composite and pure SA, respectively. Overall, the LNPs-SA bio-nanocomposite with high adsorption capacity (258.5 mg/g) could be useful in improving water quality and other related applications.

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The cornerstone of realizing lignin value-addition: Exploiting the native structure and properties of lignin by extraction methods

Cited by 112 publications

References 197 publications

Formosolv Pretreatment to Fractionate Paulownia Wood Following a Biorefinery Approach: Isolation and Characterization of the Lignin Fraction

Formosolv Pretreatment to Fractionate Paulownia Wood Following a Biorefinery Approach: Isolation and Characterization of the Lignin Fraction

‘Lignin and extractives first’ conversion of lignocellulosic residual streams using UV light from LEDs

Lignin Nanoparticles and Alginate Gel Beads: Preparation, Characterization and Removal of Methylene Blue

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