Lignin depolymerization for phenolic monomers production by sustainable processes

Fernández-Rodríguez, Javier; Erdocia, Xabier; Sánchez, Cristina; Alriols, María González; Labidi, Jalel

doi:10.1016/j.jechem.2017.02.007

Cited by 87 publications

(44 citation statements)

References 40 publications

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“…In the chemical catalysis, the sodium hydroxide acts as a catalyst breaking beta‐ O ‐4 bonds, which promotes the demethoxylation reactions . The oils that are obtained are richer in aromatic monomers, mainly catechol and its derivatives, which are interesting aromatic compounds with high potential as building blocks for the chemical industry.…”

Section: Resultsmentioning

confidence: 99%

Fast methods for the identification of suitable chemo‐enzymatic treatments of Kraft lignin to obtain aromatic compounds

Herrera

Bodi‐Paul

Gordobil

et al. 2020

Biofuels Bioprod Bioref

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Kraft lignin valorization is the cornerstone for the establishment of biorefineries based on residual fractions from the pulping processes. From the precipitation process to depolymerization, various strategies have emerged, all focused on obtaining high yields or higher purity monomers. The strategy used in this study was to modify the structure of the precipitated Kraft lignin with different oxidative enzymatic treatments, with the purpose of facilitating subsequent catalytic depolymerization. The treatments were performed with different concentrations of lacasse and mediator, and then lignin structure and chemical composition were analyzed to find the optimal treatment for depolymerization. Chemometric methods based on infrared signals were used as fast tools to reduce the complexity of the chemical information generated from lignin characterization, and were therefore used to distinguish the most appropriate chemoenzymatic treatment. The results of the chemical catalysis showed higher conversion yields of the Kraft lignin after the enzymatic process than after using only chemical catalysis. The primary compounds obtained were catechol and its derivatives, thus validating its selection by means of infrared spectroscopy and chemometrics. In conclusion, it was possible to choose a straightforward chemoenzymatic process that improves the conversion of the Kraft lignin to aromatic compounds with the help of non-destructive, low-cost, and fast tools.

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Section: Resultsmentioning

confidence: 99%

Fast methods for the identification of suitable chemo‐enzymatic treatments of Kraft lignin to obtain aromatic compounds

Herrera

Bodi‐Paul

Gordobil

et al. 2020

Biofuels Bioprod Bioref

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“…In addition, lignin is also considered as a racemic mixture, as it is evidenced by analysis of various dimeric fragments such as (±)-pinoresinoles and (±)siringoresinoles [16]. The percentage distribution of main monolignols depends on plant type, as shown in Table 1 [15,17]. The most abundant monolignol in softwoods is coniferyl alcohol, which can exceed 95% of monolignols present, while in hardwoods mainly coexist coniferyl and sinapyl alcohols.…”

Section: General Considerationsmentioning

confidence: 99%

Catalytic Processes For Lignin Valorization into Fuels and Chemicals (Aromatics)

Ventura

Dómine

Chávez-Sifontes

2019

CCAT

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Valorization of lignocellulosic biomass becomes a sustainable alternative against the constant depletion and environmental problems of fossil sources necessary for the production of chemicals and fuels. In this context, a wide range of renewable raw materials can be obtained from lignocellulosic biomass in both polymeric (i.e. cellulose, starch, lignin) and monomeric (i.e. sugars, polyols, phenols) forms. Lignin and its derivatives are interesting platform chemicals for industry, although mainly due to its refractory characteristics its use has been less considered compared to other biomass fractions. To take advantage of the potentialities of lignin, it is necessary to isolate it from the cellulose/ hemicellulosic fraction, and then apply depolymerization processes; the overcoming of technical limitations being a current issue of growing interest for many research groups. In this review, significant data related to the structural characteristics of different types of commercial lignins are presented, also including extraction and isolation processes from biomass, and industrial feedstocks obtained as residues from paper industry under different treatments. The review mainly focuses on the different depolymerization processes (hydrolysis, hydrogenolysis, hydrodeoxygenation, pyrolysis) up to now developed and investigated analyzing the different hydrocarbons and aromatic derivatives obtained in each case, as well as the interesting reactions some of them may undergo. Special emphasis is done on the development of new catalysts and catalytic processes for the efficient production of fuels and chemicals from lignin. The possibilities of applications for lignin and its derivatives in new industrial processes and their integration into the biorefinery of the future are also assessed.

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“…Depolymerization is usually applied as one of the main steps for taking full advantage of lignin ‐components. The conditions applied for the depolymerization of lignin obtained from OTPB are 300 ° C, 80 min and 4% by weight of NaOH as a catalyst . The process results in three main streams, i.e., phenolic oil, coke, and residual lignin.…”

Section: Research On Different Types Of Olive‐derived Biomassesmentioning

confidence: 99%

“…The process results in three main streams, i.e., phenolic oil, coke, and residual lignin. When depolymerization is conducted under extreme conditions and with the aid of a catalyst, the phenolic‐enriched stream can be converted in simple products such as catechols, cresols, and phenols, which are highly valued because of their applications in the pharmaceutical, medicinal and polymer production industries …”

Section: Research On Different Types Of Olive‐derived Biomassesmentioning

confidence: 99%

Olive‐derived biomass as a source of energy and chemicals

Ruiz

Romero‐García

Romero

et al. 2017

Biofuels Bioprod Bioref

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Olive trees are cultivated in more than 40 countries worldwide over more than 10 million hectares. In addition to olive oil, a large amount of biomass is produced annually. All this biomass must be adequately handled and disposed of. Conventional disposal methods include direct burning or spreading in fields, but this has economical costs and environmental concerns, as well as wasting a source of energy and chemicals. This review summarizes the most recent proposals for the use of biomass derived from olive tree cultivation and olive oil production processes. Biomass produced from pruning, leaves, olive stones and pomace, extracted olive pomace, and olive waste water are considered, and the main options for processing are reviewed according to recent advances in the literature. The biorefinery concept applied to olive‐derived biomass is also presented and representative works are discussed. © 2017 Society of Chemical Industry and John Wiley & Sons, Ltd

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Lignin depolymerization for phenolic monomers production by sustainable processes

Cited by 87 publications

References 40 publications

Fast methods for the identification of suitable chemo‐enzymatic treatments of Kraft lignin to obtain aromatic compounds

Fast methods for the identification of suitable chemo‐enzymatic treatments of Kraft lignin to obtain aromatic compounds

Catalytic Processes For Lignin Valorization into Fuels and Chemicals (Aromatics)

Olive‐derived biomass as a source of energy and chemicals

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