Fractionation methods of eucalyptus kraft lignin for application in biorefinery
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Felipe Pedersoli Borges
, Ana Márcia Macedo Ladeira Carvalho , Iara Fontes Demuner , Fernando José Borges Gomes, Jéssica Silva Gomes
, Caio César Zandonadi Nunes , Marcela Ribeiro Coura , Laís Teixeira Rodrigues und Angélica de Cássia Oliveira Carneiro
Abstract
Kraft lignin has high dispersity and low reactivity. This study aimed to obtain more homogeneous and modified chemical fractions from the application of fractionation methods using organic solvents and acid precipitation. Organic solvents used were ethyl acetate, ethanol, methanol and acetone. The pHs tested were 9, 7, 5, 3 and 1, by adding hydrochloric acid. The fractions were characterized of acid-soluble and insoluble lignin, carbohydrates, ashes, elemental analysis and by Py-GC/MS. All fractions obtained in both fractionation methods showed higher carbon contents, higher purity and lower S/G ratio than the corresponding initial materials, characteristics that are very favorable for the application in biorefinery. Acetone-soluble (sequential) and pH 1 (one-step) precipitated fractions are the most promising for carbon fiber production. Fractions soluble in ethyl acetate (one-step) and insoluble at pH 3 and 1 (sequential) appear to be the most appropriate for applications that require good oxidative properties. The fractions soluble in ethanol (one-step), methanol (one-step), acetone (one-step) and precipitated at pH 9 (one-step) and pH 5 (sequential) are the ones that allow better chemical substitution in obtaining bioproducts. Fractions soluble in ethanol (sequential) and precipitated at pHs 5 and 1 (sequential) are not of commercial interest due to their low yield.
Acknowledgments
Funding provided by the Minas Gerais State Research Foundation (FAPEMIG), from the Brazilian National Council for Science and Technology Development (CNPq), Coordination for the Improvement of Higher Education Personnel (CAPES) is greatly appreciated.
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Research ethics: Not applicable.
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Informed consent: Not applicable.
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Author contributions: The authors have accepted responsibility for the entire content of this manuscript and approved its submission. Conceptualization: Felipe Pedersoli Borges, Ana Márcia Macedo Ladeira Carvalho, Iara Fontes Demuner and Fernando José Borges Gomes. Methodology: Felipe Pedersoli Borges and Marcela Ribeiro Coura. Formal analysis and investigation: Felipe Pedersoli Borges, Jéssica Silva Gomes, Caio César Zandonadi Nunes and Laís Teixeira Rodrigues. Writing – original draft preparation: Felipe Pedersoli Borges. Writing – review and editing: Ana Márcia Macedo Ladeira Carvalho, Iara Fontes Demuner, Fernando José Borges Gomes, Marcela Ribeiro Coura, Jéssica Silva Gomes, Caio César Zandonadi Nunes, Laís Teixeira Rodrigues and Angélica de Cássia Oliveira Carneiro.
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Use of Large Language Models, AI and Machine Learning Tools: None declared.
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Conflict of interest: The authors state no conflict of interest.
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Research funding: None declared.
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Data availability: The raw data can be obtained on request from the corresponding author.
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© 2024 Walter de Gruyter GmbH, Berlin/Boston
Artikel in diesem Heft
- Frontmatter
- Biorefining
- Fractionation methods of eucalyptus kraft lignin for application in biorefinery
- Pulp and paper industry side-stream materials as feed for the oleaginous yeast species Lipomyces starkeyi and Rhodotorula toruloides
- Chemical Pulping
- Comparing classic time series models and state-of-the-art time series neural networks for forecasting as-fired liquor properties
- Optimization of kraft pulping process for Sesbania aculeata (dhaincha) stems using RSM
- On the nature of the selectivity of oxygen delignification
- Unlocking potential: the role of chemometric modeling in pulp and paper manufacturing
- Effects of chemical environment on softwood kraft pulp: exploring beyond conventional washing methods
- Bleaching
- Variations in carbohydrates molar mass distribution during chemical degradation and consequences on fibre strength
- Mechanical Pulping
- Energy consumption in refiner mechanical pulping
- Paper Technology
- Australian wheat and hardwood fibers for advanced packaging materials
- Compression refining: the future of refining? Application to bleached kraft eucalyptus pulp
- The effect of nanocellulose to coated paper and recycled paper
- Interpreting the relationship between properties of wood and pulping & paper via machine learning algorithms combined with SHAP analysis
- Hybridization to prepare environmentally friendly, cost-effective superhydrophobic oleophobic coatings
- Paper Physics
- Characterising the mechanical behaviour of dry-formed cellulose fibre materials
- Paper Chemistry
- Study on the properties of ground film paper prepared from lactic acid-modified cellulose
- Environmental Impact
- Characterization of sludge from a cellulose pulp mill for its potential biovalorization
- The in situ green synthesis of metal organic framework (HKUST-1)/cellulose/chitosan composite aerogel (CSGA/HKUST-1) and its adsorption on tetracycline
- Evaluation of the potential use of powdered activated carbon in the treatment of effluents from bleached kraft pulp mills
- Recycling
- Waste newspaper activation by sodium phosphate for adsorption dynamics of methylene blue
Artikel in diesem Heft
- Frontmatter
- Biorefining
- Fractionation methods of eucalyptus kraft lignin for application in biorefinery
- Pulp and paper industry side-stream materials as feed for the oleaginous yeast species Lipomyces starkeyi and Rhodotorula toruloides
- Chemical Pulping
- Comparing classic time series models and state-of-the-art time series neural networks for forecasting as-fired liquor properties
- Optimization of kraft pulping process for Sesbania aculeata (dhaincha) stems using RSM
- On the nature of the selectivity of oxygen delignification
- Unlocking potential: the role of chemometric modeling in pulp and paper manufacturing
- Effects of chemical environment on softwood kraft pulp: exploring beyond conventional washing methods
- Bleaching
- Variations in carbohydrates molar mass distribution during chemical degradation and consequences on fibre strength
- Mechanical Pulping
- Energy consumption in refiner mechanical pulping
- Paper Technology
- Australian wheat and hardwood fibers for advanced packaging materials
- Compression refining: the future of refining? Application to bleached kraft eucalyptus pulp
- The effect of nanocellulose to coated paper and recycled paper
- Interpreting the relationship between properties of wood and pulping & paper via machine learning algorithms combined with SHAP analysis
- Hybridization to prepare environmentally friendly, cost-effective superhydrophobic oleophobic coatings
- Paper Physics
- Characterising the mechanical behaviour of dry-formed cellulose fibre materials
- Paper Chemistry
- Study on the properties of ground film paper prepared from lactic acid-modified cellulose
- Environmental Impact
- Characterization of sludge from a cellulose pulp mill for its potential biovalorization
- The in situ green synthesis of metal organic framework (HKUST-1)/cellulose/chitosan composite aerogel (CSGA/HKUST-1) and its adsorption on tetracycline
- Evaluation of the potential use of powdered activated carbon in the treatment of effluents from bleached kraft pulp mills
- Recycling
- Waste newspaper activation by sodium phosphate for adsorption dynamics of methylene blue