Studies on lignin extraction from rice husk by a soda-ethanol treatment: Kinetics, separation, and characterization of products

Dagnino, Eliana Paola; Felissia, Fernando Esteban; Chamorro, Ester; Área, María Cristina

doi:10.1016/j.cherd.2017.10.026

Cited by 19 publications

(13 citation statements)

References 33 publications

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“…36 Using a soda-ethanol technique, lignin may be extracted from hemicellulose-free rice husk with a maximum yield of 91.7% at a temperature of 160 °C for 100 min. 83 The functionality of sulfur-free lignin could be improved by chemical modification. Several sulfur-free extraction processes have already been developed to synthesize lignin from biomass and several functionalized applications with economical and environmental significance were fabricated.…”

Section: Lignin Extraction Methodsmentioning

confidence: 99%

Lignin Modification for Enhanced Performance of Polymer Composites

Taher,

Wang,

Faridul Hasan

et al. 2023

ACS Appl. Bio Mater.

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Section: Lignin Extraction Methodsmentioning

confidence: 99%

Lignin Modification for Enhanced Performance of Polymer Composites

Taher,

Wang,

Faridul Hasan

et al. 2023

ACS Appl. Bio Mater.

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“…13 and 14) led to improved delignification degrees. In related studies, alkaline-organosolv methods were successfully applied to rice husks [35,36]. Native and pretreated sugarcane bagasse were also delignified by alkaline-organosolv delignification, resulting in a significantly higher lignin removal in the native samples [38,39].…”

Section: Delignification Treatmentsmentioning

confidence: 99%

Development of Pretreatment Strategies for the Fractionation of Hazelnut Shells in the Scope of Biorefinery

et al. 2020

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Hazelnut shells are an important waste from the hazelnut processing industry that could be valorized in a multi-product biorefinery. Individual or combined pretreatments may be integrated in processes enabling the integral fractionation of biomass. In this study, fractionation methods based on alkaline, alkaline-organosolv, organosolv, or acid-catalyzed organosolv treatments were applied to raw or autohydrolyzed hazelnut shells. A comparative analysis of results confirmed that the highest lignin removal was achieved with the acid-catalyzed organosolv delignification, which also allowed limited cellulose losses. When this treatment was applied to raw hazelnut shells, 65.3% of the lignin was removed, valuable hemicellulose-derived products were obtained, and the cellulose content of the processed solids increased up to 54%. Autohydrolysis of hazelnut shells resulted in the partial solubilization of hemicelluloses (mainly in the form of soluble oligosaccharides). Consecutive stages of autohydrolysis and acid-catalyzed organosolv delignification resulted in 47.9% lignin removal, yielding solids of increased cellulose content (55.4%) and very low content of residual hemicelluloses. The suitability of selected delignified and autohydrolyzed-delignified hazelnut shells as substrates for enzymatic hydrolysis was assessed in additional experiments. The most susceptible substrates (from acid-catalyzed organosolv treatments) reached 74.2% cellulose conversion into glucose, with a concentration of 28.52 g glucose/L.

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“…Shatalov et al [ 19 ] found that lignin polymers can be regarded as individual structural elements or groups of closely related structural elements in a homogeneous lignin separation system. Dagnino et al [ 20 ] treated rice husks with soda–ethanol. The kinetics of lignin extraction was studied.…”

Section: Introductionmentioning

confidence: 99%

Kinetics of Lignin Separation during the Atmospheric Fractionation of Bagasse with p-Toluenesulfonic Acid

Deng

Luo

Peng

et al. 2022

IJMS

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As a green and efficient component separation technology, organic acid pretreatment has been widely studied in biomass refining. In particular, the efficient separation of lignin by p-toluenesulfonic acid (p-TsOH) pretreatment has been achieved. In this study, the mechanism of the atmospheric separation of bagasse lignin with p-TsOH was investigated. The separation kinetics of lignin was analyzed. A non-simple linear relationship was found between the separation yield of lignin and the concentration of p-TsOH, the temperature and the stirring speed. The shrinking nucleus model for the separation of lignin was established based on the introduction of mass transfer and diffusion factors. A general model of the total delignification rate was obtained. The results showed that the process of lignin separation occurred into two phases, i.e., a fast stage and a slow stage. The results provide a theoretical basis for the efficient separation of lignin by p-TsOH pretreatment.

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Studies on lignin extraction from rice husk by a soda-ethanol treatment: Kinetics, separation, and characterization of products

Cited by 19 publications

References 33 publications

Lignin Modification for Enhanced Performance of Polymer Composites

Lignin Modification for Enhanced Performance of Polymer Composites

Development of Pretreatment Strategies for the Fractionation of Hazelnut Shells in the Scope of Biorefinery

Kinetics of Lignin Separation during the Atmospheric Fractionation of Bagasse with p-Toluenesulfonic Acid

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