Lignin valorization: Status, challenges and opportunities

Sethupathy, Sivasamy; Morales, Gabriel Murillo; Gao, Lu; Wang, Hongliang; Yang, Bin; Jiang, Jianxiong; Sun, Jianzhong; Zhu, Daochen

doi:10.1016/j.biortech.2022.126696

Cited by 193 publications

(96 citation statements)

References 136 publications

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“…Regarding the lignin content of CAB (around 15 to 18 wt. %), it is a substance that confers recalcitrance [ 125 ]. The lignin content found in the present study is slightly lower than the one reported by dos Santos Lima et al.…”

Section: Resultsmentioning

confidence: 99%

Chemical composition and bioactive compounds of cashew (Anacardium occidentale) apple juice and bagasse from Colombian varieties

Reina

Durán-Aranguren

Forero-Rojas

et al. 2022

Heliyon

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Section: Resultsmentioning

confidence: 99%

Chemical composition and bioactive compounds of cashew (Anacardium occidentale) apple juice and bagasse from Colombian varieties

Reina

Durán-Aranguren

Forero-Rojas

et al. 2022

Heliyon

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“…An empirical equation [Eq. (1)] was used to fit the whole SANS curve. [51] It assumed that the low-q scattering was dominated by mass fractal aggregates, and the intermediate-to high-q scattering mainly came from the individual lignin subunits.…”

Section: Resultsmentioning

confidence: 99%

“…Lignin represents an abundant and underutilized natural aromatic resource. Different approaches have been explored to utilize lignin's polyphenolic structures and improve its valorization [1,2] . Lignin presents a variety of research opportunities in polymer science, [3,4] materials science, [5,6] biomedical science, [7–9] and energy storage [10–13] .…”

Section: Introductionmentioning

confidence: 99%

“…Different approaches have been explored to utilize lignin's polyphenolic structures and improve its valorization. [1,2] Lignin presents a variety of research opportunities in polymer science, [3,4] materials science, [5,6] biomedical science, [7][8][9] and energy storage. [10][11][12][13] In these applications, however, there are two major roadblocks of structural variability and heterogeneity of isolated lignins, depending the source of the lignin and the extraction process.…”

Section: Introductionmentioning

confidence: 99%

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Determination of the Structures of Lignin Subunits and Nanoparticles in Solution by Small‐Angle Neutron Scattering: Towards Improving Lignin Valorization

Zhang

Yang

et al. 2022

ChemSusChem

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Lignin nanoparticles (LNPs) are usually produced from lignin solution through supersaturation. The structure of the lignin in solution is still poorly understood due to structural variability of isolated lignins. Here, lignins were extracted from different plants to establish a general pattern of their structure in several lignin solvents. Lignin molecules (lignin subunits) and larger aggregates were observed in dimethyl sulfoxide (DMSO), ethylene glycol (EG) and 0.1 N NaOD solutions by small-angle neutron scattering (SANS). It was proposed that the aggregates were composed of lignin subunits with a higher molecular weight and a higher ratio of the aliphatic to phenolic hydroxyl groups. The size, shape, and compactness are important factors that affect the uses of the LNPs, which were obtained from the SANS data for the first time. A discrepancy in the radius between SANS and DLS was discovered, pointing to a large hydration shell around the LNPs in aqueous solutions. The cytotoxicity of the corncob lignin, kraft lignin, and their LNPs were measured and compared.

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“…Because of its high carbon-oxygen ratio and rich aromatics, it is the most promising material for generating products, such as biofuels and other high-value chemicals ( Wang H. et al, 2019 ; Wang et al, 2021 ). However, the lack of efficient degradation and resource utilization technologies for lignin is the main bottleneck restricting the sustainability and cost-competitiveness of lignocellulose biorefinery ( Sethupathy et al, 2022 ). The pulp and paper industry generates approximately 50 million tons of lignin annually with ca.…”

Section: Introductionmentioning

confidence: 99%

Recent Biotechnology Advances in Bio-Conversion of Lignin to Lipids by Bacterial Cultures

Wang

Peng

et al. 2022

Front. Chem.

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The complexity and recalcitrance of the lignin structure is a major barrier to its efficient utilization and commercial production of high-value products. In recent years, the “bio-funneling” transformation ability of microorganisms has provided a significant opportunity for lignin conversion and integrated biorefinery. Based on the chemical structure of lignin, this mini-review introduces the recent advances of lignin depolymerization by bacterial strains and the application of microbial lignin degradation in lipids production. Furthermore, the current challenges, future trends and perspectives for microbe-based lignin conversion to lipids are discussed.

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Lignin valorization: Status, challenges and opportunities

Cited by 193 publications

References 136 publications

Chemical composition and bioactive compounds of cashew (Anacardium occidentale) apple juice and bagasse from Colombian varieties

Chemical composition and bioactive compounds of cashew (Anacardium occidentale) apple juice and bagasse from Colombian varieties

Determination of the Structures of Lignin Subunits and Nanoparticles in Solution by Small‐Angle Neutron Scattering: Towards Improving Lignin Valorization

Recent Biotechnology Advances in Bio-Conversion of Lignin to Lipids by Bacterial Cultures

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