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Journal articles on the topic 'Hydrolysis lignin'

Author: Grafiati

Published: 28 May 2022

Last updated: 30 July 2025

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1

Huang, Yang, Chenhuan Lai, Shaolong Sun, Qiang Yong, Brian K. Via, and Maobing Tu. "Organosolv lignin properties and their effects on enzymatic hydrolysis." BioResources 15, no. 4 (2020): 8909–24. http://dx.doi.org/10.15376/biores.15.4.8909-8924.

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Lignin plays a crucial role in enzymatic hydrolysis of lignocellulosic biomass. To evaluate the correlation between lignin properties and its effects on enzymatic hydrolysis, five organosolv lignins (OLs) were isolated from woody biomass, and their physico-chemical properties and structural features were characterized. The effects of OL addition on enzymatic hydrolysis of microcrystalline cellulose (pure cellulose) were assessed first, which showed their disparate effects. The addition of three OLs increased the 72 h hydrolysis yield by 7.4% to 10.1%, while the addition of other two OLs reduce

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2

Krutov, Stepan, Elena Ipatova, and Aleksander Vasilyev. "Steam explosion treatments of technical hydrolysis lignin." Holzforschung 71, no. 7-8 (2017): 571–74. http://dx.doi.org/10.1515/hf-2016-0176.

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AbstractTechnical hydrolysis lignins, both freshly obtained and stored longterm under atmosphere conditions, were treated by steam explosion (SE, 235°C/3.2 MPa) for 1, 2, and 3 min. The SE treated lignins were characterized by means of solid-state13C nuclear magnetic resonance (NMR) and Fourier transform infrared (FTIR) spectroscopy. It was found that SE leads to significant changes in morphological and chemical properties of lignin due to oxidation, condensation and hydrolytic destruction.

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3

Thring, Ronald W., Esteban Chornet, Jean Bouchard, Pierre F. Vidal, and Ralph P. Overend. "Characterization of lignin residues derived from the alkaline hydrolysis of glycol lignin." Canadian Journal of Chemistry 68, no. 1 (1990): 82–89. http://dx.doi.org/10.1139/v90-017.

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Lignin residues from the alkaline hydrolysis of solvolytic lignin have been characterized by elemental analysis, size exclusion chromatography, Fourier transform infrared spectroscopy, 13C NMR, and for methoxyl content. All lignin residues were found to have higher carbon and lower oxygen contents than the original glycol lignin. Methoxyl contents decreased with increasing severity of treatment. All treated lignins have lower molecular weights than the original, which is indicative of the extensive depolymerization of glycol lignin by alkaline hydrolysis. The appearance of new bands in the 305

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4

Duarte, Ana Paula, Danielle Robert, and Dominique Lachenal. "Eucalyptus globulus Kraft Pulp Residual Lignins. Part 1. Effects of Extraction Methods upon Lignin Structure." Holzforschung 54, no. 4 (2000): 365–72. http://dx.doi.org/10.1515/hf.2000.063.

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Summary Residual lignins of Eucalyptus globulus kraft pulp were shown to be structurally different depending upon the type of extraction chosen. Enzymatic hydrolysis releases a residual lignin with a well preserved etherified structure but substantially contaminated by protein and carbohydrate moieties coming from the enzyme. Moreover, the extraction yield is poor and obviously it does not work as well as in the case of softwood kraft pulp. The residual lignin extracted by acid hydrolysis has less etherified units and more free phenolic functions than that of the enzymatic hydrolysis. It conta

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Duarte, A. P., D. Robert, and D. Lachenal. "Eucalyptus globulus Kraft Pulp Residual Lignin. Part 2. Modification of Residual Lignin Structure in Oxygen Bleaching." Holzforschung 55, no. 6 (2001): 645–51. http://dx.doi.org/10.1515/hf.2001.105.

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Summary Residual lignins were isolated from unbleached and oxygen-bleached Eucalyptus kraft pulps by acid hydrolysis. The structural changes and degradation of residual lignin occurring during kraft pulping and oxygen bleaching were followed and identified by elemental analysis, residual carbohydrate analysis, molecular mass distribution, as well as qualitative and quantitative solution 13C NMR. The dissolved lignins in the kraft cooked and oxygen bleached liquors were also studied and compared with the corresponding residual lignins. Milled wood lignin treated under acid hydrolysis conditions

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6

Zhang, Jinchao, Chaojun Wu, Dongmei Yu, and Yachong Zhu. "Structural characterization of soluble lignin in the pre-hydrolysis liquor of bamboo-willow dissolving pulp." BioResources 15, no. 1 (2019): 825–39. http://dx.doi.org/10.15376/biores.15.1.825-839.

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The soluble lignin present in the pre-hydrolysis liquor (PHL) is detrimental for value-added utilization of the PHL from production of kraft-based dissolving pulp. In this paper, the soluble lignin was separated from PHL by activated carbon adsorption and subsequent desorption with methanol. The structural characteristics of the soluble and dioxane lignins (from bamboo-willow material) were analyzed by Fourier transform infrared (FTIR) spectroscopy, nuclear magnetic resonance (NMR), and thermogravimetric analysis (TGA). The FTIR and proton-NMR results showed that cleavage of β-O-4 aryl-ether l

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7

Henry, Christián, Akash Gondaliya, Mark Thies, and Mojgan Nejad. "Studying the Suitability of Nineteen Lignins as Partial Polyol Replacement in Rigid Polyurethane/Polyisocyanurate Foam." Molecules 27, no. 8 (2022): 2535. http://dx.doi.org/10.3390/molecules27082535.

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In this study, nineteen unmodified lignins from various sources (hardwood, softwood, wheat straw, and corn stover) and isolation processes (kraft, soda, organosolv, sulfite, and enzymatic hydrolysis) were used to replace 30 wt.% of petroleum-based polyol in rigid polyurethane/polyisocyanurate (PUR/PIR) foam formulations. Lignin samples were characterized by measuring their ash content, hydroxyl content (Phosphorus Nuclear Magnetic Resonance Spectroscopy), impurities (Inductively Coupled Plasma), and pH. After foam formulation, properties of lignin-based foams were evaluated and compared with a

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8

Pokryshkin, S. A., Yu A. Sypalova, I. A. Grishanovich, and A. Yu Kozhevnikov. "Effect of the Various Delignification Methods on the Individual Lignin Pyrolysis Products." Eurasian Chemico-Technological Journal 27, no. 2 (2025): 139–48. https://doi.org/10.18321/ectj1661.

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Pyrolysis-gas chromatography-mass spectrometry (Py-GC/MS) was used to analyze a series of the technical and near-native birch lignins. The main monomeric components of lignins and their ratios have been determined. The contribution of the main monomeric units (S/G/H) to the lignin macromolecule was evaluated. Structural fragments are shown, the content of which is significantly influenced by the delignification method. Using RDBE (ring double bond equivalents) vs Cn and van Krevelen diagrams allowed to comprehensively characterize the monomeric composition of lignin pyrolysis products. Differe

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9

Reznikov, Ivan V., Tatyana A. Savitskaya, and Dmitry D. Grinshpan. "Structure formation in binary systems hydrolysis lignin – oil product and thermochemical transformations of composites on their basis." Journal of the Belarusian State University. Chemistry, no. 1 (March 5, 2020): 3–18. http://dx.doi.org/10.33581/2520-257x-2020-1-3-18.

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Rheological properties of hydrophobized hydrolysis lignin dispersions in tank oil, diesel fuel, and industrial oil were under study. It was found that at the hydrolysis lignin content of more than 20 wt. %, a coagulation-thixotropic structure with a pseudoplastic flow pattern is formed. The parameters of structure formation calculated within the theory of elastic flocks made it possible to characterize dispersions in diesel fuel as least structured. In accordance with the theory of diffusion-limited aggregation, a computer model of the aggregate of hydrolytic lignin particles in diesel fuel wa

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10

Akim, Leonid G., Dimitris S. Argyropoulos, Lise Jouanin, et al. "Quantitative 31P NMR Spectroscopy of Lignins from Transgenic Poplars." Holzforschung 55, no. 4 (2001): 386–90. http://dx.doi.org/10.1515/hf.2001.064.

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Summary Milled wood lignins isolated from genetically modified poplar trees were studied by quantitative 31P NMR spectroscopy, in combination with thioacidolysis and mild alkaline hydrolysis. The genetic transformation of the trees included down regulation of CAD and COMT enzyme activities. These analyses confirmed that moderate CAD down-regulation does not substantially alter lignin structure. In contrast, severe CAD deficiency alters the lignin structure more profoundly by decreasing the syringyl/guaiacyl ratio and increasing the degree of condensation of the lignin. The most severe alterati

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11

Golubkov, Viktor A., Valery E. Tarabanko, Konstantin L. Kaygorodov, et al. "CHEMICAL PROCESSING OF AGRICULTURE WASTES INTO VANILLIN, PULP AND GLUCOSE." chemistry of plant raw material, no. 4 (December 15, 2023): 137–45. http://dx.doi.org/10.14258/jcprm.20230413782.

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Agrotechnical wastes from processing herbaceous plants consist of lignin and polysaccharides, which can be processed into monomers – phenols and carbohydrates. The prospects of chemical processing of several agrotechnical waste types with a high lignin content (flax shives, sunflower seed husks and buckwheat husks) into vanillin, pulp, and glucose by oxidation and acid hydrolysis were studied. It has been shown that despite the distant phylogenetic relationship of the studied plants, their lignins have a similar structure: they contain a similar amount of methoxyl groups (10–13 wt.% per lignin

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12

Lakina, Natalia V., Valentin Yu Doluda, Esfir M. Sulman, Irina P. Shkileva, and Olga S. Burmatova. "STUDY OF METHOD OF PROCESSING CELLULOSIC AND LIGNIN-CONTAINING RAW MATERIALS USING CELLULOLYTIC ENZYMES." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 61, no. 1 (2017): 78. http://dx.doi.org/10.6060/tcct.20186101.5454.

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In the research the results of bioethanol and other valuable products formation are described during peat hydrolytic formation. The factors of cellulose-lignin raw materials (peat and wood sawdust) stability to the action of various hydrolyzing agents were determined. The obtained experimental data indicate the efficiency of peat and sawdust samples pre-treatment with H2SO4 (90 wt.%), which is expressed in the highest yield of reducing substances during hydrolysis of the samples, in comparison with the results obtained with H2SO4 pretreatment of a lower concentration. The article shows the res

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13

Popova, Olga, and Tatyana Finochenko. "Synthesis and properties of ion-exchange materials based on hydrolysis lignins." E3S Web of Conferences 273 (2021): 04011. http://dx.doi.org/10.1051/e3sconf/202127304011.

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Hydrolytic lignin is a large-tonnage waste product of ethyl alcohol production and is a renewable resource. The structure of lignin is characterized by the presence of a large number of hydroxyl groups, which provides the value of lignin as a raw material for synthesis in polymer chemistry. But due to their low chemical stability in dilute alkalis, acids and solvents, lignins are of little use for wide practical use. The introduction of additional functional groups into the lignin maromolecule by oxidative modification with the use of resource-saving technologies makes it possible to obtain ne

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14

Minakov, A. V., E. I. Mikhienkova, A. D. Skorobogatova, et al. "Impact of Modified Hydrolytic Lignins Additives on the Functionality of Water-Based Drilling Fluids." Ecology and Industry of Russia 26, no. 8 (2022): 32–39. http://dx.doi.org/10.18412/1816-0395-2022-8-32-39.

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Systematic field studies results of the impact of modified hydrolysis lignin additives on mud and polymer mud drilling fluids functionality were presented. Samples of the original and modified hydrolytic lignin were determined by chemical and elemental analysis, infrared spectroscopy, scanning electron microscopy, and BET. It was concluded that the additives of the original and modified hydrolytic lignin can reduce filtrationloss quality, reduce the friction coefficient, inhibit the swelling behavior, and increase the stability of mud drilling fluids.

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15

Opra, Denis P., Sergey V. Gnedenkov, Sergey L. Sinebryukhov, Alexander K. Tsvetnikov, and Valentin I. Sergienko. "Fabrication of Battery Cathode Material Based on Hydrolytic Lignin." Solid State Phenomena 213 (March 2014): 154–59. http://dx.doi.org/10.4028/www.scientific.net/ssp.213.154.

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The relationship between the discharge performance of a lithium/hydrolytic lignin battery and the parameters of the cathode material fabrication process has been revealed. Electrochemical characterization was carried out using a galvanostatic discharge experiments. It was found that the specific capacity of hydrolytic lignin was found to be 600 mAh/g at a discharge current density of 45 μA/cm2. The results demonstrate the prospects of hydrolysis lignin-based batteries application as low-rate power sources.

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16

Marlin, Nathalie, Dominique Lachenal, Laurence Magnin, and Marie-Christine Brochier-Salon. "Study of the oxygen effect on mechanical pulp lignin using an improved lignin isolation method." Holzforschung 59, no. 2 (2005): 116–23. http://dx.doi.org/10.1515/hf.2005.018.

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Abstract Lignins from kraft and mechanical pulps were isolated before and after oxygen treatment with conventional methods (acidolysis and enzymatic isolation) and with a novel two-step method combining an enzymatic treatment and acidolysis. Results showed that the combined enzymatic hydrolysis-acidolysis made it possible to extract lignin from pulp with a better yield than acidolysis alone and with a higher degree of purity than after enzymatic hydrolysis alone. The lignin samples isolated with the two-step method were analysed by 13C NMR, 19F NMR and by gel permeation chromatography. It was

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17

Vikman, Minna, Olesya Fearon, and Anna Kalliola. "Biodegradation of alkali-O2 oxidized lignins used as dispersants." BioResources 17, no. 4 (2022): 6079–93. http://dx.doi.org/10.15376/biores.17.4.6079-6093.

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Large quantities of lignin are produced as by-streams via chemical pulping and emerging biorefinery processes. These lignins are typically water-insoluble; however, they can be converted into a water-soluble form by chemical modifications. A novel LigniOx technology solubilizes lignin using alkali-O2 oxidation. The product can be used for bio-based dispersants. This study evaluated the biodegradability of alkali-O2 oxidized kraft, organosolv, and hydrolysis lignin. The oxidized lignins exhibited higher biodegradation in soil and in aquatic environments in comparison to a commercial kraft ligni

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18

Carvalho, Danila Morais de, and Jorge Luiz Colodette. "Comparative study of acid hydrolysis of lignin and polysaccharides in biomasses." BioResources 12, no. 4 (2017): 6907–23. http://dx.doi.org/10.15376/biores.12.4.6907-6923.

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Effects of different acid hydrolysis conditions were studied relative to the chemical transformations of lignin in eucalyptus, sugarcane bagasse, and sugarcane straw, and on the transformations of multiple polysaccharides in eucalyptus. The acid hydrolysis using 12 mol/L sulfuric acid followed by acid hydrolysis using approximately 0.41 mol/L sulfuric acid was used as the reference for the lignin and sugar analysis. During acid hydrolysis, the relative amount of lignin increased with longer reaction times and/or greater acid concentrations for all biomasses. The overestimation of lignin in har

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19

Corbett, Derek, Ofei Mante, and Biljana Bujanovic. "Toward valorization of lignin: characterization and fast pyrolysis of lignin recovered from hot-water extracts of electron-beam irradiated sugar maple." April 2017 16, no. 04 (2017): 213–26. http://dx.doi.org/10.32964/tj16.4.213.

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This paper provides an analysis of lignin-rich (>80%) solids recovered as a byproduct of hot-water extraction (HWE) pretreatment performed on sugar maple (Acer saccharum) (autohydrolysis at 160ºC for 2 h). The effects of electron beam irradiation (EBI) pretreatment before HWE were assessed with regard to lignin removal during HWE and selected features of the recovered lignin. The results of catalytic fast pyrolysis – gas chromatography-mass spectrometry (Py-GCMS) are also discussed. EBI of sugar maple increased lignin removal (delignification) during subsequent HWE; however, recovery of dis

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20

Wu, Wenjuan, Penghui Li, Lijing Huang, et al. "The Role of Lignin Structure on Cellulase Adsorption and Enzymatic Hydrolysis." Biomass 3, no. 1 (2023): 96–107. http://dx.doi.org/10.3390/biomass3010007.

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Lignin is one of the important components of lignocellulosic cell walls, which endows plant cell walls with rigidity and strength and protects them from microbial invasion. The presence of lignin is thought to hinder the conversion of biomass to bioenergy, so understanding enzyme-lignin interactions is very important in order to reduce the inhibition of lignin and improve the hydrolysis yields. Conversion of lignocellulosic raw materials into bioethanol is divided into pretreatment, enzymatic hydrolysis, and fermentation. In this paper, both pretreatment and enzymatic hydrolysis of lignocellul

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21

Pu, Yunqiao, and Arthur J. Ragauskas. "Structural analysis of acetylated hardwood lignins and their photoyellowing properties." Canadian Journal of Chemistry 83, no. 12 (2005): 2132–39. http://dx.doi.org/10.1139/v05-231.

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Lignin was isolated from aspen bleached chemithermomechanical pulp by employing a mild acid hydrolysis procedure, and the extracted material was acetylated with acetic anhydride. Nuclear magnetic resonance analyses indicated that the relative ease of acetylating lignin hydroxyl groups was phenolic >> γ-side chain > α-side chain. Non-acetylated and acetylated lignins were impregnated onto cellulosic test sheets, and the photo-behavior of the lignins was examined under irradiation with two light sources, a fluorescent lamp and a black lamp. Optical reflective studies indicated acetylati

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Parveen, Heena, Lakshmi Tewari, Diwas Pradhan, and Parul Chaudhary. "Comparative study of diverse pretreatment approaches to degrade lignin from Bambusa balcooa." BioResources 17, no. 4 (2022): 5578–99. http://dx.doi.org/10.15376/biores.17.4.5578-5599.

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Bamboo biomass is a potential source of monomeric sugars containing a high cellulose content with a low amount of lignin. However, for efficient hydrolysis, an effective biomass pretreatment technique is required to minimize the lignin content and other barrier components. In the present study, bamboo biomass was treated with different physical, chemical, biological, and combined treatments to reduce the lignin content. Among all the pretreatments, the maximum lignin removal amount (14.5%) was obtained with the combined chemical and biological treatment under 2% NaOH + 1% H2O2 + WDP2 fungal cu

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23

Jin, Di, Weifang Dong, Haitao Zhang, et al. "Comparison of structural characteristics of straw lignins by alkaline and enzymatic hydrolysis." BioResources 14, no. 3 (2019): 5615–29. http://dx.doi.org/10.15376/biores.14.3.5615-5629.

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Lignin was separated from wheat straw by NaOH cooking and enzymatic hydrolysis, obtaining yields of 86.2% and 78.6%, respectively. Fourier transform infrared spectrometry (FT-IR) and two-dimensional nuclear magnetic resonance (2D-HSQC) analyses indicated that the H units (p-hydroxyphenyl units) of the Enzymatic Hydrolysis Lignin (EHL) did not suffer much damage. The number-average molecular weight (Mn) of the EHL measured by gel permeation chromatography (GPC) was 3348 g/mol, which was higher than that (3047 g/mol) of Alkali Lignin (AL). The Cr(VI) adsorption experiments demonstrated that the

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24

Lai, Chenhuan, Maobing Tu, Qiang Yong, and Shiyuan Yu. "Disparate roles of solvent extractable lignin and residual bulk lignin in enzymatic hydrolysis of pretreated sweetgum." RSC Advances 5, no. 119 (2015): 97966–74. http://dx.doi.org/10.1039/c5ra22308c.

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The roles of solvent extractable lignin and residual bulk lignin in enzymatic hydrolysis of Avicel and lignocellulosic biomass were distinguished in this study. The extractable lignin showed the positive effects on enzymatic hydrolysis.

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25

Corderi, Sandra, Tom Renders, Kelly Servaes, Karolien Vanbroekhoven, Tony De Roo, and Kathy Elst. "Strategies for the Removal of Polysaccharides from Biorefinery Lignins: Process Optimization and Techno Economic Evaluation." Molecules 26, no. 11 (2021): 3324. http://dx.doi.org/10.3390/molecules26113324.

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The utilization of biorefinery lignins as a renewable resource for the production of bio-based chemicals and materials remain a challenge because of the high polysaccharide content of this variety of lignins. This study provides two simple methods; (i) the alkaline hydrolysis-acid precipitation method and (ii) the acid hydrolysis method for the removal of polysaccharides from polymeric biorefinery lignin samples. Both purification strategies are optimized for two different hardwood hydrolysis lignins, HL1 and HL2, containing 15.1% and 10.1% of polysaccharides, respectively. The treated lignins

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26

Lakhmanov, D. E., Yu G. Khabarov, V. A. Veshnyakov, and M. R. Yokubjanov. "Nitration of Hydrolysis Lignin in Water-Aprotic Solvent Mixtures." Lesnoy Zhurnal (Forestry Journal), no. 5 (November 5, 2020): 184–92. http://dx.doi.org/10.37482/0536-1036-2020-5-184-192.

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Industrial lignins are formed from native lignins during chemical or biochemical processing of plant raw materials. Lignins can be modified to produce valuable products, including monomers, polymeric materials, and composites. The article presents the results of a study of hydrolysis lignin nitration under various conditions. The aim of the study was to obtain a nitrated hydrolysis lignin with a maximum yield and maximum nitrogen content. Therefore, the nitration was carried out using nitric acid in a water-aprotic solvent binary mixtures (1,4-dioxane, dimethyl sulfoxide, tetrahydrofuran, dime

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27

Johansson, Christian, Knut Lundquist, and Hans Theliander. "Fractionation of processed spruce wood obtained in the production of ethanol." BioResources 4, no. 1 (2008): 15–25. http://dx.doi.org/10.15376/biores.4.1.15-25.

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Fuel ethanol can be produced from pretreated spruce wood through enzymatic hydrolysis and fermentation. Processed spruce wood samples (acid-catalyzed steam hydrolysis followed by enzymatic hydrolysis and fermentation) were fractionated into water-soluble products and residual solids. The dioxane/water soluble portions of the solids were fractionated by liquid-liquid extraction. A substantial portion of the processed wood (20-70 %) was insoluble in both water and dioxane/water. An almost pure lignin fraction, corresponding to about 20 % of the total lignin of the wood, was isolated. Examination

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Hemmilä, Venla, Reza Hosseinpourpia, Stergios Adamopoulos, and Arantxa Eceiza. "Characterization of Wood-based Industrial Biorefinery Lignosulfonates and Supercritical Water Hydrolysis Lignin." Waste and Biomass Valorization 11, no. 11 (2019): 5835–45. http://dx.doi.org/10.1007/s12649-019-00878-5.

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Abstract Understanding the properties of any particular biorefinery or pulping residue lignin is crucial when choosing the right lignin for the right end use. In this paper, three different residual lignin types [supercritical water hydrolysis lignin (SCWH), ammonium lignosulfonate (A-LS), and sodium lignosulfonate (S-LS)] were evaluated for their chemical structure, thermal properties and water vapor adsorption behavior. SCWH lignin was found to have a high amount of phenolic hydroxyl groups and the highest amount of β-O-4 linkages. Combined with a low ash content, it shows potential to be us

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Wang, Wen, Xinshu Zhuang, Zhenhong Yuan, Wei Qi, Qiang Yu, and Qiong Wang. "Structural Changes of Lignin after Liquid Hot Water Pretreatment and Its Effect on the Enzymatic Hydrolysis." BioMed Research International 2016 (2016): 1–7. http://dx.doi.org/10.1155/2016/8568604.

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During liquid hot water (LHW) pretreatment, lignin is mostly retained in the pretreated biomass, and the changes in the chemical and structural characteristics of lignin should probably refer to re-/depolymerization, solubilization, or glass transition. The residual lignin could influence the effective enzymatic hydrolysis of cellulose. The pure lignin was used to evaluate the effect of LHW process on its structural and chemical features. The surface morphology of LHW-treated lignin observed with the scanning electron microscopy (SEM) was more porous and irregular than that of untreated lignin

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Guillaume, N.Rivière, Pion Florian, Farooq Muhammad, et al. "Toward waste valorization by converting bioethanol production residues into nanoparticles and nanocomposite films." Sustainable Materials and Technologies 28, e00269 (2021): 11. https://doi.org/10.1016/j.susmat.2021.e00269.

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A “waste-valorization” approach was developed to transform recalcitrant hydrolysis lignin (HL) from second-generation bioethanol production into multifunctional bio-based products. The hydrolysis lignin (HL) was extracted with aqueous acetone, yielding two fractions enriched in lignin and cellulose, respectively. The soluble hydrolysis lignin (SHL) was converted into anionic and cationic colloidal lignin particles (CLPs and c-CLPs). The insoluble cellulose-rich fraction was transformed into lignocellulosic nanofibrils that were further combined with CLPs or

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Shestakov, S. L., Yu A. Popova, A. Yu Kozhevnikov, D. S. Kosyakov, and S. A. Sypalov. "The Study of Water Sorption with Hydrolysis Lignin by Solid-State NMR Spectroscopy." Eurasian Chemico-Technological Journal 21, no. 4 (2019): 325. http://dx.doi.org/10.18321/ectj889.

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Hydrolysis lignin is formed as a by-product of cellulose production and has limited industrial application. The ability of hydrolysis lignin to absorb and retain some water is important aspect for the study of its properties and modification methods. The processes of water sorption by hydrolysis lignin were studied with solid-state NMR spectroscopy. The samples were humidified in desiccators containing different saturated salts solutions with different relative air humidity above them. The sorption capacity of the samples was determined by water sorbed from the air, and it was found that ligni

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32

Zhou, Linchao, Leonardo da Costa Sousa, Bruce E. Dale, Jia-Xun Feng, and Venkatesh Balan. "The effect of alkali-soluble lignin on purified core cellulase and hemicellulase activities during hydrolysis of extractive ammonia-pretreated lignocellulosic biomass." Royal Society Open Science 5, no. 6 (2018): 171529. http://dx.doi.org/10.1098/rsos.171529.

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Removing alkali-soluble lignin using extractive ammonia (EA) pretreatment of corn stover (CS) is known to improve biomass conversion efficiency during enzymatic hydrolysis. In this study, we investigated the effect of alkali-soluble lignin on six purified core glycosyl hydrolases and their enzyme synergies, adopting 31 enzyme combinations derived by a five-component simplex centroid model, during EA-CS hydrolysis. Hydrolysis experiment was carried out using EA-CS(−) (approx. 40% lignin removed during EA pretreatment) and EA-CS(+) (where no lignin was extracted). Enzymatic hydrolysis experiment

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Lan, Tianqing, Tong Lin, and Yuyue Qin. "Enhancement of enzyme hydrolysis by increasing the zeta potential to reduce non-productive cellulase adsorption on sugarcane bagasse treated with liquid hot water." BioResources 15, no. 3 (2020): 5965–74. http://dx.doi.org/10.15376/biores.15.3.5965-5974.

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The enhancement of enzymatic hydrolysis is important for the biorefinery industry of lignocellulose. Changing the pH of hydrolysis is a simple and direct way to improve hydrolysis efficiencies. In this study, the enzymatic hydrolysis efficiencies of sugarcane bagasse (SCB) treated with liquid hot water (LHW) were 56.7% and 65.5% at pHs of 4.8 and 5.5, respectively. The result of cellulase adsorption on the LHW treated SCB showed that the non-productive adsorption was smaller at pH 5.5, which might tend to enhance hydrolysis. The surface hydrophobicity of lignin was larger at pH 5.5. This sugge

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34

Kellock, Miriam, Jenni Rahikainen, Anna S. Borisova, et al. "Inhibitory effect of lignin on the hydrolysis of xylan by thermophilic and thermolabile GH11 xylanases." Biotechnology for Biofuels and Bioproducts 15, no. 1 (2022): 49. https://doi.org/10.1186/s13068-022-02148-4.

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<strong>Background: </strong>Enzymatic hydrolysis of lignocellulosic biomass into platform sugars can be enhanced by the addition of accessory enzymes, such as xylanases. Lignin from steam pretreated biomasses is known to inhibit enzymes by non-productively binding enzymes and limiting access to cellulose. The effect of enzymatically isolated lignin on the hydrolysis of xylan by four glycoside hydrolase (GH) family 11 xylanases was studied. Two xylanases from the mesophilic <i>Trichoderma reesei</i>, TrXyn1, TrXyn2, and two forms of a thermostable metagenomic xylanase Xyl40 were compared.<stro

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Davidson, Daniel J., Aidan P. McKay, David B. Cordes, J. Derek Woollins, and Nicholas J. Westwood. "The Covalent Linking of Organophosphorus Heterocycles to Date Palm Wood-Derived Lignin: Hunting for New Materials with Flame-Retardant Potential." Molecules 28, no. 23 (2023): 7885. http://dx.doi.org/10.3390/molecules28237885.

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Environmentally acceptable and renewably sourced flame retardants are in demand. Recent studies have shown that the incorporation of the biopolymer lignin into a polymer can improve its ability to form a char layer upon heating to a high temperature. Char layer formation is a central component of flame-retardant activity. The covalent modification of lignin is an established technique that is being applied to the development of potential flame retardants. In this study, four novel modified lignins were prepared, and their char-forming abilities were assessed using thermogravimetric analysis. T

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Keane, Angela, and Subhasis Ghoshal. "Acid Hydrolysis Lignin as a Sorbent for Naphthalene." Water Quality Research Journal 36, no. 4 (2001): 719–35. http://dx.doi.org/10.2166/wqrj.2001.038.

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Abstract Lignin, a major polymeric constituent of woody plant tissue, is an abundant source of natural organic matter available as a waste product from the pulp and paper and the fuel ethanol industries. In this study, the sorptive capacity of acid hydrolysis lignin for naphthalene, a representative nonpolar hydrophobic organic compound (HOC), was investigated. When powdered lignin is mixed with distilled water, dissolved and/or colloidal organic matter leaches into the aqueous phase imparting a cloudy yellowish colour. A washing and filtering protocol was developed for pretreating the lignin

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Zhou, Li Chun, Qing Wei Ping, Jian Zhang, and Hai Qiang Shi. "Study on Optimizate Isolation and Purification Technology of the Reed Ethanol Lignin." Advanced Materials Research 726-731 (August 2013): 3109–12. http://dx.doi.org/10.4028/www.scientific.net/amr.726-731.3109.

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Ethanol pulping is a kind of solvent pulping technology. The utilization of lignin in waste liquor can reduce pollution and increase high value of product. The lignin in the waste liquor could be isolated by adding water in the system after standing for several hours and purified by enzymatic and acidic hydrolysis two-step procedure. Results showed that the optimized purification conditions are as follows, enzyme dosage is 0.004g/g (to oven dry lignin), enzymatic buffer pH is 5, enzymatic hydrolysis temperature is 30°C, and hydrochloric acid concentration of acid hydrolysis is 0.055mol/L. The

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Boltovsky, V. S. "Enzymatic hydrolysis of plant raw materials: state and prospects." Proceedings of the National Academy of Sciences of Belarus, Chemical Series 57, no. 4 (2021): 502–12. http://dx.doi.org/10.29235/1561-8331-2021-57-4-502-512.

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Plant raw materials are practically an inexhaustible natural resource, since they are constantly renewed in the process of plant photosynthesis, which determines the prospects for their use for industrial processing in various ways, including hydrolytic. The main biopolymer components of plant biomass in terms of their quantitative content are polysaccharides, the hydrolytic processing of which by acidic or enzymatic hydrolysis leads to the formation of monosaccharides and various products obtained from them. This review of scientific literature analyzes theoretical concepts and the current st

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Jung, Woochul, Ratna Sharma-Shivappa, and Praveen Kolar. "Effect of Enzyme Interaction with Lignin Isolated from Pretreated Miscanthus x gigantues on Cellulolytic Efficiency." Processes 7, no. 10 (2019): 755. http://dx.doi.org/10.3390/pr7100755.

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The effect of binding between the lignin isolates from an alkali (NaOH)– and an acid (H2SO4)– pretreated Miscanthus and cellulolytic enzymes in Cellic® CTec2 was investigated. Additonally, cellobiose and Avicel were enzymatically hydrolyzed with and without lignin isolates to study how enzyme binding onto lignin affects its conversion to glucose. Three carbohydrate–lignin loadings (0.5:0.25, 0.5:0.5, and 0.5:1.0% (w/v)) were employed. The results indicated that β-glucosidase (BG) had a strong tendency to bind to all lignin isolates. The overall tendency of enzyme binding onto lignin isolate wa

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Lawoko, Martin, Gunnar Henriksson, and Göran Gellerstedt. "Characterization of lignin-carbohydrate complexes from spruce sulfite pulp." Holzforschung 60, no. 2 (2006): 162–65. http://dx.doi.org/10.1515/hf.2006.026.

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Abstract Lignin-carbohydrate complexes (LCCs) were isolated from unbleached acid sulfite pulp by selective enzymatic hydrolysis followed by fiber swelling and extraction. Approximately 80% of the lignin in the pulp was found to be chemically linked to carbohydrates in three major fractions, viz. as one glucan-lignin complex (with 8% lignin) and two hemicellulose-lignin complexes (with 72% lignin). The latter two were further separated into one glucomannan-lignin complex (with ∼25% lignin) and one xylan-lignin-glucomannan complex (with 45–50% lignin). Based on model experiments, it can be concl

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Mardina, Primata, Adelina I. Talalangi, Jhon F. M. Sitinjak, Andri Nugroho, and M. Reza Fahrizal. "PENGARUH PROSES DELIGNIFIKASI PADA PRODUKSI GLUKOSA DARI TONGKOL JAGUNG DENGAN HIDROLISIS ASAM ENCER." Konversi 2, no. 2 (2013): 17. http://dx.doi.org/10.20527/k.v2i2.78.

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Hidrolisis asam encer dari tongkol jagung untuk produksi glukosa mengalami hambatan karena adanya lignin. Penelitian ini bertujuan mengetahui pengaruh dari proses perusakan lignin dengan proses menggunakan hidrolisis basa Hidrolisis basa yang biasa disebut delignifikasi dilakukan pada suhu 55oC selama 4 jam dengan konsentrasi larutan basa, yaitu NaOH 5%, 10% dan 15% berat Hasil menunjukkan bahwa konsentrasi NaOH yang optimal untuk pengurangan lignin adalah 15% berat dengan persentase pengurangan sebesar 89,3%. Tongkol jagung yang tidak dan telah didelignifikasi dengan NaOH kemudian dihidrolisi

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Bujanovic, Biljana, Sally A. Ralph, Richard S. Reiner, and Rajai H. Atalla. "Lignin modification in the initial phase of softwood kraft pulp delignification with polyoxometalates (POMs)." Holzforschung 61, no. 5 (2007): 492–98. http://dx.doi.org/10.1515/hf.2007.102.

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Abstract Commercial softwood kraft pulp with kappa number 30.5 (KP30.5) was delignified with polyoxometalates (POM, Na5(+2)[SiV1(-0.1)MoW10(+0.1)O40]), and POM-treated kraft pulp of kappa number 23.6 was obtained (KPPOM,23.6). Residual lignin from pulps was isolated by mild acid hydrolysis and characterized by analytical and spectral methods to gain insight into lignin reactions taking place during the initial delignification phase. Lignin from POM-delignified pulp was isolated in lower yield. Comparative analysis of residual lignins (RL-KP30.5, RL-KPPOM,23.6) showed that POM leads to products

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Sakdaronnarong, Chularat, Nattawee Srimarut, and Navadol Laosiripojana. "Polyurethane Synthesis from Sugarcane Bagasse Organosolv and Kraft Lignin." Key Engineering Materials 659 (August 2015): 527–32. http://dx.doi.org/10.4028/www.scientific.net/kem.659.527.

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Sugarcane bagasse (SCB) was subjected to a single-step fractionation and hydrolysis reaction in the presence of various organic solvents. The reaction was performed at 170 °C for 3 h when sodium hydroxide was used as catalyst. The results showed that suitable solvents significantly enhanced the yield of lignin fractionation and simultaneous hydrolysis reaction took place indicated by an increase of hydroxyl groups in lignin molecules. Lignin-based polyurethane (LPU) from SCB organosolv lignin polyols had relatively better mechanical and thermal resistant properties compared to LPU from liquefi

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Svärd, Antonia, Olena Sevastyanova, Galina Dobele, Vilhemina Jurkjane, and Elisabet Brännvall. "COST Action FP1105: effect of raw materials and pulping conditions on the characteristics of dissolved kraft lignins." Holzforschung 70, no. 12 (2016): 1105–14. http://dx.doi.org/10.1515/hf-2016-0057.

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Abstract The composition, molecular weight (MW), and chemical structure of technical lignins as byproducts of pulping influence their application in terms of physical and chemical properties, reactivity, and performance. It is important to know how the analytical data of technical lignins are influenced by the wood species and the parameters of pulping. The present study focuses on kraft pulping and how the wood species (eucalyptus, pine, and spruce) and variable cooking times influence the characteristics of dissolved lignins. The black liquor (BL) was recovered after three different cooking

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Krafft, Malte Jörn, Marie Bendler, Andreas Schreiber, and Bodo Saake. "Steam Refining with Subsequent Alkaline Lignin Extraction as an Alternative Pretreatment Method to Enhance the Enzymatic Digestibility of Corn Stover." Agronomy 10, no. 6 (2020): 811. http://dx.doi.org/10.3390/agronomy10060811.

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Agricultural residues are promising and abundant feedstocks for the production of monomeric carbohydrates, which can be gained after pretreatment and enzymatic hydrolysis. These monomeric carbohydrates can be fermented to platform chemicals, like ethanol or succinic acid. Due to its high availability, corn stover is a feedstock of special interest in such considerations. The natural recalcitrance of lignocellulosic material against degradation necessitates a pretreatment before the enzymatic hydrolysis. In the present study, a novel combination of steam refining and alkaline lignin extraction

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Spirina, T. N., N. N. Saprykina, O. A. Andreeva, et al. "Morphology of modified hydrolysis lignin." Russian Journal of Applied Chemistry 85, no. 5 (2012): 794–98. http://dx.doi.org/10.1134/s1070427212050199.

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Sazanov, Yu N., E. N. Popova, I. V. Sumerskii, et al. "Thermochemical transformations of hydrolysis lignin." Russian Journal of Applied Chemistry 83, no. 9 (2010): 1607–14. http://dx.doi.org/10.1134/s1070427210090193.

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Maryandyshev, Pavel, Aleksei Kangash, and Victor Lyubov. "Investigation of thermal degradation of hydrolysis lignin." MATEC Web of Conferences 209 (2018): 00011. http://dx.doi.org/10.1051/matecconf/201820900011.

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Wood hydrolysis facilities were built in both northern and southern European regions of Russia, as well as in Siberia and the Russian Far East. Other hydrolysis plant in the former USSR were located in Ukraine, Belarus, Uzbekistan, Kazakhstan, Moldova and Lithuania. All or most of these facilities produced substantial amounts of excess lignin, so called “hydrolysis lignin” (HL). Technology of energy utilization of HL, having a great potential is a production of granulated fuel. Perspective way is pelletization of HL. In this paper complex kinetic analysis of hydrolysis lignin and its organic c

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Gnedenkov, Sergei Vasil'evich, Denis Pavlovich Opra, Sergei Leonidovich Sinebryukhov, Aleksandr Konstantinovich Tsvetnikov, Aleksandr Yur'evich Ustinov, and Valentin Ivanovich Sergienko. "The lithium batteries based on the gidrolytic lignin." Electrochemical Energetics 13, no. 1 (2013): 23–33. http://dx.doi.org/10.18500/1608-4039-2013-13-1-23-33.

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In this paper the possibility of applying of hydrolysis lignin as the lithium battery cathode material was demonstrated for the first time. Hydrolysis lignin features have been investigated by impedance spectroscopy, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. Electrochemical characterization was carried out at room temperature using 1M LiBF4 in γ-butyrolacton electrolyte system. The chemical composition of cathode materials upon battery discharge down to 0.9 V was studied by the X-ray photoelectron spectroscopy and Infrared spectroscopy. The suggestions on possible

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Moe, Størker T., and Arthur J. Ragauskas. "Oxygen Delignification of High-Yield Kraft Pulp. Part I: Structural Properties of Residual Lignins." Holzforschung 53, no. 4 (1999): 416–22. http://dx.doi.org/10.1515/hf.1999.069.

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Summary The chemistry of oxygen delignification of high-yield kraft pulp was studied by analysis of residual lignin extracted from kraft and kraft-oxygen pulps using the acid hydrolysis/dioxane extraction method. For reference pulps cooked to kappa numbers between 20 and 25, the content of free phenolic groups decreased to about 50% the original value upon oxygen delignification, while the content of carboxylic acid groups increased by 50–100%. For lignins isolated from high-yield kraft pulp and oxygen delignified high-yield kraft pulp, it was shown that high-yield kraft pulping with polysulfi

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