Pretreatment of willow using the alkaline-catalyzed sulfolane/water solution for high-purity and antioxidative lignin production

Zhong, Lei; Xu, Miaomiao; Wang, Chao; Shao, Lupeng; Mao, Jianzhen; Jiang, Weikun; Ji, Xingxiang; Yang, Guihua; Chen, Jiachuan; Lyu, Gaojin; Yoo, Chang Geun; Xu, Feng

doi:10.1016/j.ijbiomac.2020.05.074

Cited by 30 publications

(8 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With the increment of NaOH dosage from 0.25 to 2% (treatment for 1 h), the M w and M n of lignin fractions decrease from 4163 to 3088 and from 2369 to 1772 g/mol, respectively. The alkaline catalyst-assisted organic solvent appears to cut off the alkali-sensitive bonds between lignin units or between lignin and carbohydrates and effectively reduce the size of lignin molecules . Interestingly, the molecular weight of lignin fractions was increased slightly from 3088 to 3400 g/mol with the treatment time from 1 to 1.5 h. The increase could be due to repolycondensation of released lignin due to prolonged processing times .…”

Section: Resultsmentioning

confidence: 99%

“…Likewise, the total reducing sugar of a cauliflower waste reached a maximum output of 831 mg/g through enzymatic hydrolysis coupled with sodium acetate-aided methanol . In addition, high-purity and antioxidative lignin from a willow could be extracted through a NaOH-catalyzed sulfolane/water system . These successful efforts are being continued with an emphasis on optimizing lignin isolation and/or improving the yield of fermented sugar.…”

Section: Introductionmentioning

confidence: 99%

“…16 In addition, high-purity and antioxidative lignin from a willow could be extracted through a NaOH-catalyzed sulfolane/water system. 17 These successful efforts are being continued with an emphasis on optimizing lignin isolation and/or improving the yield of fermented sugar. However, fractionation for enzymatic hydrol- ysis of cellulose and isolation of high-quality lignin under mild alkali-aided organosolv conditions has not yet been explored.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Alkali-Catalyzed Organosolv Pretreatment of Lignocellulose Enhances Enzymatic Hydrolysis and Results in Highly Antioxidative Lignin

Zhong

Wang

et al. 2021

Energy Fuels

Self Cite

View full text Add to dashboard Cite

Herein, efficient exploitation of biomass with diluted alkali-aided methanol organosolv treatment has been proposed. The ultrahigh glucose yield and high value-added lignin from xylose residue were simultaneously achieved via the mild alkali catalytic organosolv treatment and enzymatic hydrolysis. The NaOH-aided methanol pretreatment resulted in a more efficient delignification of 86.7%, which significantly facilitated the cellulase accessibility toward gaining a high glucose yield of 97.7%. In addition, the recovered lignin is highly pure with small and homogeneous molecular weight and high thermal stability. The total phenolic and antioxidant activities of the lignin were carried out by a Folin−Ciocalteu method and radical DPPH and ABTS assays, respectively. Results revealed that the modified lignin effectively scavenged radicals compared to the commercial antioxidants (butylated hydroxytoluene). Overall, this study provides a mild but a highly promising pretreatment approach for energy production from biomass. The excellent radical scavenging capacity of the obtained lignin further sets the stage for biobased functional materials in the popular biorefinery.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Alkali-Catalyzed Organosolv Pretreatment of Lignocellulose Enhances Enzymatic Hydrolysis and Results in Highly Antioxidative Lignin

Zhong

Wang

et al. 2021

Energy Fuels

Self Cite

View full text Add to dashboard Cite

show abstract

“…Figure 5 highlights the FT-IR spectra of LNPs, SA beads and SA/LNPs-40 beads. In the LNPs, characteristic peaks at 1460 cm −1 correspond to the vibration of C−H deformation of lignin [ 55 ]. The peaks at 1508 cm −1 and 1024 cm −1 are due to C−C aromatic skeletal vibration and C−O stretching, respectively [ 56 , 57 ].…”

Section: Resultsmentioning

confidence: 99%

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

et al. 2022

Self Cite

View full text Add to dashboard Cite

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.

show abstract

“…Zhong et al pretreated willow by alkaline catalysis with a sulfolane/water solvent system and prepared antioxidant lignin with high purity. The results showed that the lignin removal rate was 54% at 170°C with the sulfolane/water solvent system (mass ratio of 50/50; Zhong et al, 2020 ). Interestingly, when 4 wt% of NaOH was added as alkali catalyst, the lignin removal rate could gradually increase up to 94%, and the losses in glucose and xylose were controlled around 1.62 and 4.08%, respectively.…”

Section: Green Solvent Pretreatment Methods With Industrial Application Prospectsmentioning

confidence: 99%

The Pretreatment of Lignocelluloses With Green Solvent as Biorefinery Preprocess: A Minor Review

et al. 2021

View full text Add to dashboard Cite

Converting agriculture and forestry lignocellulosic residues into high value-added liquid fuels (ethanol, butanol, etc.), chemicals (levulinic acid, furfural, etc.), and materials (aerogel, bioresin, etc.) via a bio-refinery process is an important way to utilize biomass energy resources. However, because of the dense and complex supermolecular structure of lignocelluloses, it is difficult for enzymes and chemical reagents to efficiently depolymerize lignocelluloses. Strikingly, the compact structure of lignocelluloses could be effectively decomposed with a proper pretreatment technology, followed by efficient separation of cellulose, hemicellulose and lignin, which improves the conversion and utilization efficiency of lignocelluloses. Based on a review of traditional pretreatment methods, this study focuses on the discussion of pretreatment process with recyclable and non-toxic/low-toxic green solvents, such as polar aprotic solvents, ionic liquids, and deep eutectic solvents, and provides an outlook of the industrial application prospects of solvent pretreatment.

show abstract

Pretreatment of willow using the alkaline-catalyzed sulfolane/water solution for high-purity and antioxidative lignin production

Cited by 30 publications

References 53 publications

Alkali-Catalyzed Organosolv Pretreatment of Lignocellulose Enhances Enzymatic Hydrolysis and Results in Highly Antioxidative Lignin

Alkali-Catalyzed Organosolv Pretreatment of Lignocellulose Enhances Enzymatic Hydrolysis and Results in Highly Antioxidative Lignin

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

The Pretreatment of Lignocelluloses With Green Solvent as Biorefinery Preprocess: A Minor Review

Contact Info

Product

Resources

About