Literatura académica sobre el tema "Lignocellulosic biomass valorization"
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Artículos de revistas sobre el tema "Lignocellulosic biomass valorization"
Luque, Rafael y Kostas Triantafyllidis. "Valorization of Lignocellulosic Biomass". ChemCatChem 8, n.º 8 (20 de abril de 2016): 1422–23. http://dx.doi.org/10.1002/cctc.201600226.
Texto completoSiddique, Mohammad, Ali Nawaz Mengal, Suleman khan, Luqman Ali khan y Ehsanullah khan Kakar. "Pretreatment of lignocellulosic biomass conversion into biofuel and biochemical: a comprehensive review". MOJ Biology and Medicine 8, n.º 1 (21 de marzo de 2023): 39–43. http://dx.doi.org/10.15406/mojbm.2023.08.00181.
Texto completoHaq, Ikram, Kinza Qaisar, Ali Nawaz, Fatima Akram, Hamid Mukhtar, Xin Zohu, Yong Xu et al. "Advances in Valorization of Lignocellulosic Biomass towards Energy Generation". Catalysts 11, n.º 3 (26 de febrero de 2021): 309. http://dx.doi.org/10.3390/catal11030309.
Texto completoChuetor, Santi, Rafael Luque, Cécile Barron, Abderrahim Solhy, Xavier Rouau y Abdellatif Barakat. "Innovative combined dry fractionation technologies for rice straw valorization to biofuels". Green Chemistry 17, n.º 2 (2015): 926–36. http://dx.doi.org/10.1039/c4gc01718h.
Texto completoNargotra, Parushi, Vishal Sharma, Yi-Chen Lee, Yung-Hsiang Tsai, Yung-Chuan Liu, Chwen-Jen Shieh, Mei-Ling Tsai, Cheng-Di Dong y Chia-Hung Kuo. "Microbial Lignocellulolytic Enzymes for the Effective Valorization of Lignocellulosic Biomass: A Review". Catalysts 13, n.º 1 (31 de diciembre de 2022): 83. http://dx.doi.org/10.3390/catal13010083.
Texto completoSaraeian, Alireza, Alvina Aui, Yu Gao, Mark M. Wright, Marcus Foston y Brent H. Shanks. "Evaluating lignin valorization via pyrolysis and vapor-phase hydrodeoxygenation for production of aromatics and alkenes". Green Chemistry 22, n.º 8 (2020): 2513–25. http://dx.doi.org/10.1039/c9gc04245h.
Texto completoTanis, Medya Hatun, Ola Wallberg, Mats Galbe y Basel Al-Rudainy. "Lignin Extraction by Using Two-Step Fractionation: A Review". Molecules 29, n.º 1 (22 de diciembre de 2023): 98. http://dx.doi.org/10.3390/molecules29010098.
Texto completoSinghvi, Mamata S. y Digambar V. Gokhale. "Lignocellulosic biomass: Hurdles and challenges in its valorization". Applied Microbiology and Biotechnology 103, n.º 23-24 (9 de noviembre de 2019): 9305–20. http://dx.doi.org/10.1007/s00253-019-10212-7.
Texto completoPanakkal, Elizabeth y Malinee Sriariyanun. "Valorization of Lignocellulosic Biomass to Value Added Products". Journal of King Mongkut's University of Technology North Bangkok 33, n.º 1 (2 de diciembre de 2022): 1–3. http://dx.doi.org/10.14416/j.kmutnb.2022.12.001.
Texto completoRijo, Bruna, Ana Paula Soares Dias, Nicole de Jesus y Manuel Francisco Pereira. "Home Trash Biomass Valorization by Catalytic Pyrolysis". Environments 10, n.º 10 (20 de octubre de 2023): 186. http://dx.doi.org/10.3390/environments10100186.
Texto completoTesis sobre el tema "Lignocellulosic biomass valorization"
Di, Menno Di Bucchianico Daniele. "Development of processes for the valorization of lignocellulosic biomass based on renewable energies". Electronic Thesis or Diss., Normandie, 2023. http://www.theses.fr/2023NORMIR27.
Texto completoThe world is facing the impacts of climate change due to its long dependence on fossil fuels, and specifically Europe, which is facing an energy crisis, has recognized the fragility of its fossil fuel-dependent energy system and has moved strongly towards renewable energy resources. Among renewables, biomass not only powers bio-energy production but also serves as a vital source of bio-carbon, used to create high-value molecules, replacing fossil-based products. Alkyl levulinates, derived from biomass, particularly stand out for their potential as bio-additives and bio-fuels. Acid solvolysis of hexose sugars from biomass appears to be a promising and cost-effective production route, which requires further investigation not yet found in the literature. The potential of alkyl levulinate extends to its conversion into γ-valerolactone (GVL), a promising bio-solvent, commonly obtained by hydrogenation through molecular-hydrogen. Besides being a key reagent, hydrogen is also a promising energy carrier, facilitating the integration of renewable energy sources into the market. Hydrogen energy storage systems support this integration, promoting 'green' industrial transformation. This thesis focuses on technological investigation and sustainability assessment of a potential biorefinery system, integrating lignocellulosic biomass valorization, energy production, and hydrogen generation. The study encompasses experimental investigations, optimizing technologies for the production of butyl levulinate and its subsequent hydrogenation to GVL. Sustainability considerations are fundamental to the process configuration, aligning with the global shift towards renewable and carbon bio-resources. In order to answer the question of sustainability, the research presents a first section focused on the experimental investigation of the optimal technology for the production of butyl levulinate. The solvolysis of the biomass-derived hexose Fructose to butyl levulinate was investigated, in terms of optimal process conditions and kinetic modelling. Selected an effective heterogeneous catalyst, the effect of the solvent was investigated, showing the benefits of using GVL as co-solvent, together with butanol, on the conversion and dissolution kinetics of fructose. In these conditions, the solvolysis to butyl levulinate was studied in depth from a kinetic point of view, first by proposing a model for the solvolysis of 5-HMF, an intermediate in the fructose pathway, and then extending the modelling from fructose itself. A robust kinetic model, describing the reaction mechanism of solvolysis, was defined and validated, particularly under conditions of high initial fructose concentration (applying the concept of High-gravity), and including in the modelling the kinetics of dissolution, and degradation of fructose, under acidic conditions.In the second part of the research, the technological perspective was extended to the hydrogenation of butyl levulinate to GVL. Starting from a conceptual design phase, the overall fructose-to-GVL process scheme was defined, simulated, and optimized on the basis of the process intensification concept. In the third part, the process was then dropped into a real case study in Normandy, France, adapting the analysis to the local availability of lignocellulosic biomass and wind energy. The study defines a methodology for designing and integrating the energy-supply system, evaluating different scenarios. The sustainability assessment, based on key performance indicators spanning economic, environmental, and social dimensions, culminates in an aggregated overall sustainability index. The results highlight scenarios integrating the GVL biorefinery system with wind power and hydrogen energy storage as promising, demonstrating high economic profitability and reduced environmental impact. Finally, sensitivity analyses validate the robustness and reliability of the methodology, generally extendable also to other technological systems
Come previsto, il mondo sta affrontando gli effetti tangibili del cambiamento climatico come conseguenza di un'economia basata sui combustibili fossili per centinaia di anni. Oltre a dover affrontare e adottare misure correttive per limitare gli effetti del riscaldamento globale, l'Europa sta affrontando una grave crisi energetica, che rivela la fragilità del sistema energetico europeo, prevalentemente dipendente dalle importazioni di combustibili fossili. La geopolitica delle risorse fossili ha innescato la necessaria rimodulazione dell'economia energetica europea, che si sta spostando "forzatamente" verso le risorse energetiche rinnovabili per diventare un'economia fossile e a zero emissioni di carbonio. Nel panorama delle rinnovabili, le risorse più sfruttate sono l'energia solare, eolica e da biomassa. Oltre alla produzione di bioenergia, la biomassa è una fonte inestimabile di biocarbonio, che può essere sfruttata e valorizzata per la produzione di molecole ad alto valore aggiunto che possono essere utilizzate in vari settori industriali, per la produzione di carburanti, prodotti chimici, materiali e sostituendo i corrispondenti prodotti di origine fossile. In questo contesto, sono stati sviluppati sistemi innovativi di bioraffinazione della biomassa di seconda generazione per trasformare e decostruire la complessa struttura della biomassa in molecole piattaforma più semplici, che possono poi essere trasformate in molecole ad alto potenziale. Tra queste, gli alchil levulinati sono stati identificati per il loro notevole potenziale come bioadditivi e biocarburanti. Esteri dell'acido levulinico, questi composti possono essere ottenuti da derivati della biomassa, come i monosaccaridi dello zucchero, secondo diverse vie di reazione; tra queste, la solvolisi acida degli zuccheri esosi può essere una via di produzione promettente ed economicamente vantaggiosa, che richiede ulteriori indagini non ancora presenti in letteratura. Il potenziale degli alchil levulinati risiede anche nella possibilità di un ulteriore trasformazione mediante idrogenazione per produrre γ-valerolattone (GVL), una molecola con un mercato promettente come bio-solvente, grazie alle sue proprietà di stabilità, ecotossicità e biodegradabilità. L'uso dell'idrogeno gassoso è la via più comune per l'idrogenazione del GVL, ma, oltre a essere un reagente chimico fondamentale, l'idrogeno è anche uno dei principali protagonisti della transizione energetica. Infatti, come vettore energetico, l'idrogeno può portare alla piena penetrazione delle fonti energetiche rinnovabili nel mercato dell'energia, costituendo un complemento-tampone per lo stoccaggio delle energie rinnovabili intermittenti, attraverso la progettazione di sistemi di stoccaggio dell'energia dell'idrogeno (HydESS). L'accumulo di energia a idrogeno a lungo termine può consentire l'autosufficienza dei sistemi di energia rinnovabile, in quanto agisce da ponte tra le funzionalità dei sistemi Power-to-Hydrogen, in grado di assorbire i surplus energetici delle energie rinnovabili e di immagazzinarli, e quelle dei sistemi Hydrogen-to-Power, che restituiscono energia rinnovabile quando le fonti di energia primaria non sono disponibili. In quest'ottica, lo sviluppo di tali sistemi può portare all'integrazione completa e stabile delle fonti di energia rinnovabile in asset industriali già esistenti, così come in nuovi mercati industriali, come le bioraffinerie di biomassa lignocellulosica, promuovendo lo sviluppo di realtà industriali "verdi" in termini di trasformazione di materiali ed energia. Il mercato industriale globale si sta evolvendo verso la decarbonizzazione e la riqualificazione di diversi asset, attraverso investimenti in efficienza energetica e l'introduzione di processi green per la valorizzazione delle fonti rinnovabili, ma l'implementazione su larga scala di queste iniziative richiede un'analisi completa e approfondita della loro sostenibilità
Jimenez, Quero Amparo. "Bioproduction of itaconic acid by biomass valorization, towards material elaboration". Thesis, Strasbourg, 2016. http://www.theses.fr/2016STRAE036/document.
Texto completoIn the context of sustainable development, the bioproduction of building blocks (chemical platforms) from biomass is way to substitute the current fossil-based chemical molecules. This thesis is focused on the use of lignocellulosic biomass, renewable and abundant, towards the production of two organic acids (potential building blocks): itaconic acid and fumaric acid. These molecules have been chosen especially because they can generated polymers with interesting properties. The experimental work consisted in using wheat bran and corn cobs, agricultural wastes, as substrates for fermentation by four strains of filamentous fungi from Aspergillus genus. Screenings of the best fermentation conditions show that enzymatically pretreated corn cobs, especially in solid state fermentation achieve higher yields, especially in solid state fermentation. Among other notable results, we have shown for the first time the ability of Aspergillus oryzae to produce itaconic acid. Overall, our results show that the use of lignocellulosic biomass is a promising alternative for the production of these two building blocks of industrial interest
Wiermans, Lotte [Verfasser], Walter [Akademischer Betreuer] Leitner y Martina [Akademischer Betreuer] Pohl. "Oxidative pretreatment and biocatalytic valorization of lignocellulosic biomass / Lotte Wiermans ; Walter Leitner, Martina Pohl". Aachen : Universitätsbibliothek der RWTH Aachen, 2016. http://d-nb.info/112733705X/34.
Texto completoSarvaramini, Amin. "New routes to enhance the efficiency of biomass torrefaction and gasification processes (Potentials for valorization of lignocellulosic biomass and mining residues)". Thesis, Université Laval, 2014. http://www.theses.ulaval.ca/2014/30571/30571.pdf.
Texto completoThe aim of the proposed research was to provide a better understanding of the mechanisms of biomass torrefaction and to propose practical methods to improve the efficiency of this process. As for the mechanism, torrefaction of two woody biomass samples from Quebec forests (aspen and birch) and their main constituents, i.e., lignin, cellulose and hemicellulose is studied in details using different experimental techniques and a kinetic model is developed for their torrefaction. Our studies on the mechanism and kinetics of biomass torrefaction also revealed the slow rate of biomass torrefaction which motivated us to propose and develop a new ionic-liquid assisted torrefaction process with the aim of increasing the rate of biomass torrefaction. Although torrefaction improves the physicochemical properties of biomass fuel, release of oxygenated hydrocarbons (in the form of volatiles) from biomass reduces its overall energy. To recover volatiles energy, a new combination of biomass torrefaction and chemical looping volatiles combustion was studied. In this regard, the already comminuted, abundant and cheap iron and magnesium bearing silicate minerals found widely in the form of mining residues in the province of Quebec were tested as solid oxygen carrier and up to 96% of volatiles conversion at 700°C was achieved in CLC reactor. As a supplementary work, we were also interested to explore the potential of mining residues containing sizeable quantities of iron for catalytic cracking of tar released during the gasification of biomass. For this purpose, iron-bearing mining residues and minerals obtained from the mining activities in Quebec were evaluated comparatively to olivine (known as an active mineral for tar cracking) for benzene cracking in simulated syngas. It was found that chrysotile showed up to four-fold increase in benzene and methane conversion than olivine.
Prévot, Flavie. "Valorization of vegetables wastes for the poly(lactic acid) bioproduction". Thesis, Strasbourg, 2015. http://www.theses.fr/2015STRAE008/document.
Texto completoThis thesis is articulated around the lignocellulosic biomass valorization to develop a fully sustainable, green and cheap route of PLA production. During a first study, two pretreatments have been realized on the lignocellulosic biomass in order to release the fermentable sugars. Several fermentations strategies have been considered and a screening of the couples microorganisms / biomasses has been performed in order to select the best strategy and the best couple microorganism / biomass for lactic acid production. The lactic acid bacteria, Lactobacillus casei and Lactobacillus delbrueckii and wheat bran have been selected to produce lactic acid via a liquid state fermentation on the acid hydrolysate obtained thanks to a diluted acid pretreatment on the wheat bran. During a second study, the chosen strategy has been optimized and scaled-up in order to increase the lactic acid concentration. Liquid state fermentations have been made in a bioreactor in order to control parameter needed for the optimal growth and consequently the optimal lactic acid production (pH, pO2, agitation, acid lactic production). Then, the lactic acid purification has been performed by ion exchange chromatography. This technic was made in two key steps using a strong cationic column and a weak anionic column successively. Finally, the purified lactic acid was then polymerized by ring opening polymerization (ROP). During all the researches, the green chemistry has been placed in the first plan in one hand by the choice of the topic of the study (biomass valorization) and in a second hand by the choice of each employed method (no solvent; few chemical products; sustainable, cheap and green methods)
Pachón-Morales, John Alexander. "Torrefaction and grinding of lignocellulosic biomass for its thermochemical valorization : influence of pretreatment conditions on powder flow properties". Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLC051.
Texto completoGasification of lignocellulosic biomass for production of second-generation biofuels is a promising technology to meet renewable energy needs. However, feeding and handling problems related to the poor flowability of milled biomass considerably hinder the industrial implementation of Biomass-to-Liquid processes. Torrefaction as pretreatment step, in addition to improving energy density of biomass, also affects the properties of the milled particles (namely size and shape) that significantly influence flow behavior. The evaluation of biomass flow characteristics under different flow conditions is essential to design efficient and trouble-free handling solutions.The aim of this work is to assess the effect of the torrefaction and grinding conditions on the biomass flow behavior. A first part consists of an experimental study in which the flow properties of samples torrefied under different intensities were obtained using a ring shear tester. Flowability is correlated to the intensity of torrefaction, as measured by the global mass loss, for two different wood species. Particle shape seems to be the predominant parameter influencing flowability of powders in a consolidated state. Characterization of non-consolidated flowability through avalanching analysis using an in-house rotating drum was also conducted. Correlations between particle characteristics and flow behavior are thus established.The modelling of biomass flow using the Discrete Element Method (DEM) constitutes a second major part of this research. Challenging aspects of biomass particle modeling are their submillimetric size, low density, elongated shape and cohesive behavior. A material DEM model is implemented using a simplified (multisphere) upscaled representation of particle shape, along with a cohesive contact model. A systematic calibration procedure results in an optimal set of DEM parameters. The experimental shear stress evolution and yield locus can then be realistically reproduced. The avalanching behavior of the powders is also well captured by simulations, both qualitatively and quantitatively. These results highlight the potential of DEM simulations to investigate the effect of particle characteristics, which are driven by torrefaction and grinding conditions, on the flow behavior of powdered biomass
Muralidhara, Anitha. "Physico-chemical safety issues pertaining to biosourced furanics valorization with a focus on humins as biomass resource". Thesis, Compiègne, 2019. http://www.theses.fr/2019COMP2508.
Texto completoThe present research work was integrated as part of the EU-funded project named HUGS (HUmins as Green and Sustainable precursors for eco-friendly building blocks and materials), involving 5 main partners (Institut national de l'environnement industriel et des risques - France, Avantium - the Netherlands, Institut de Chimie de Nice - France, Universidad De Cordoba- Spain and Leibniz - Institut Fur Katalyse Ev An Der Universitat Rostock- Germany). The project is essentially supported through five European Industrial Doctorate fellowships put in place when the HUGS-MSCA-ITN-2015 program was launched in 2016. The primary objective of the HUGS project was to explore several valorization pathways of so-called “humins” in order to add value and create better business cases. Humins (and similarly lignins) are the side products that may become low-cost feedstock resulting from a number of future biorefineries and sugar conversion processes. Humins are complex residues resulting from the Acid-Catalyzed Dehydration and condensation of sugars, having furan-rings in their polymeric structures. The work presented in this specific part of the HUGS project is essentially focusing on safety-related topics of all components and subsequent applications related to sugar dehydration technology. Priority actions were devoted to a first insight on the characterization of physicochemical safety profiles of the side-product humins and main (parent) furanic products. Some members of this large family of compounds (e.g. RMF and FDCA) have high volume potential which results in opening new doors towards the development of furanbased building blocks and a bio-based economy. Humins are residues or side products which can be burnt for energy. However, its safe and sustainable use in high-value applications could also become a key milestone in the so-called circular economy. In practice, the work has been developed in two main locations: primarily at the INERIS lab, located in Verneuil-en-Halatte and at Avantium, located in Amsterdam. Nearly all experimental research after the production of the components at Avantium was performed at INERIS. This involved the evaluation of physicochemical hazards of both humins (crude industrial humins and humin foams obtained by thermal curing) and a series of furanic compounds. Avantium is involved in the commercialization of humins, furanics and furanic polymers/materials as novel chemicals and materials. The work has encompassed: An extensive bibliographical review of humins, furanics, and their related products (polymers, composites) resulted in the following main conclusions o A lack of physicochemical safety-oriented studies for many furanic compounds and for humins was observed as these products are still in the early stage of development and only a few may be commercialized in the next 5 years.o Despite the limited availability of safety-related data, more studies on toxicity aspects have been conducted for a selected number of furanics than physicochemical safety-related aspects. o A few furanic family members that have been evaluated as biofuel components were found to have given better emphasis on addressing some physicochemical safety attributes. o Every modification of the process for acid-catalyzed sugar dehydration (such as solvent, temperature, residence time and sugar concentration) will result in different humins, which would certainly demand further characterization and safety profiling of the resulting humins. • Analytical development integrating the first examination of flash point distribution versus the Net Heating Values, and analysis of total heats of combustion of furanic compounds. • Design and development of experimental plan addressing the safety-related key parameters such as thermal stability, self-heating risks, fire-risk-assessment and flammability limits depending on the need for specific tests and availability of the test samples
Hennet, Lauriane. "Identification et validation de gènes pour l’amélioration du sorgho : de l’analyse transcriptomique à la validation fonctionnelle". Thesis, Montpellier, 2019. http://www.theses.fr/2019MONTG090.
Texto completoPlants Secondary Cell Walls (SCW) represent most of the renewable biomass and participate in some plant physiological functions such as nutrient transport, stress resistance and stiffness. Sorghum is a C4 grass well adapted to nutrient and water limiting conditions. Improving knowledge SCW establishment in sorghum aims at contributing to the development of varieties adapted to biomass sector including animal feed, energy production and the development of bio-materials. The objectives of the thesis presented here are to contribute to the understanding of the molecular mechanisms of SCW regulation and biosynthesis by identifying genes networks involved in this process and validating their role using reverse genetics. As a first step, a phylogenetic analysis including 9 species, allowed us to identify homologies within families of NAC and MYB TF, which are the main regulators of SCW establishment in Arabidopsis and other species. We then built gene co-expression networks of sorghum developing internode and focused on NAC and MYB networks as well as on networks with enrichment in SCW related genes Then, genes identified by these approaches were compared to those located in the chromosomal regions impacting the variability of SCW composition. In a second step we have developed genetic transformation approaches to characterize the role of identified genes by reverse genetics.We have identified 6 modules of co-expressed genes enriched with genes and gene ontologies related to cell walls and in particular 2 modules whose genes are potentially involved in the establishment of SCW. In addition, 122 NAC and 135 MYB were identified in sorghum. Among them, 14 NAC and 25 MYB are involved in the 6 co-expression networks highly enriched in cell wall genes. Of these, 19 are homologues of genes already validated in other species for their role SCW establishment and 20 have no known role. The comparison of the genes belonging to the 6 modules involved in cell wall establishment and chromosomal regions associated with the composition of the biomass revealed an intersect of 70 genes and some structural genes involved in the biosynthesis of the walls but little convergence concerning NAC and MYB TF.Although the optimization of stable genetic transformation protocols was unsuccessful, an efficient protoplast-based transient transformation protocol was optimized. This tool will be mobilized to test the roles of identified TF in networks enriched with cell wall genes
Buendia-Kandia, Felipe. "Cellulose valorization in biorefinery : synergies between thermochemical and biological processes". Thesis, Université de Lorraine, 2018. http://www.theses.fr/2018LORR0082/document.
Texto completoBecause fossil resources are exhaustible by definition, the carbon needed for energy and materials production could be obtained from lignocellulosic biomass. Fermentation processes are able to provide a wide variety of interesting products that can replace the crude oil based "building blocks". However, the abundance of lignocellulosic biomass in the environment contrasts with its very low bioavailability. Indeed, because of (i) its insoluble nature, (ii) its more or less crystalline structure and (iii) the nature of the bonds between the polymer fibers, cellulose is a carbon substrate difficult to valorize by biochemical/fermentation processes alone. Fast pyrolysis or liquefaction of cellulose are mainly studied to produce a bio-oil, which would be upgraded by catalytic hydrotreatment into fuels or building blocks. In the current state of the art, studies at the interface of these two fields involving a biochemical or microbiological conversion of these bio-oils are still rare. The aim of this thesis is the coupling of a thermochemical conversion process of cellulose, to depolymerize it, to a microbial transformation process to produce solvents, acids and gases (butanol, ethanol, acetone, acetic acid, butyric acid, lactic acid, hydrogen) that are of great interest for the fuel or green chemistry industry. To do this, beech wood was fractionated by organosolv and chlorite / acid (SC / AA) methods in order to recover a cellulose-rich pulp. Hydrothermal liquefaction and fast pyrolysis processes were used to obtain sugars that were transformed into building blocks by fermentation. Many analytical methods have been developed for the characterization of products from each step of the process. Finally, a model of the process using the commercial software Aspen Plus® was developed to establish mass and energy balances of the integrated process including: the fractionation of the wood, then the liquefaction of the cellulosic fraction and the fermentation of bio-oils
Gatt, Etienne. "Etude de la déconstruction de résidus agricoles lignocellulosiques par extrusion biocatalytique". Thesis, Toulouse, INPT, 2019. http://www.theses.fr/2019INPT0006/document.
Texto completoBiocatalytic extrusion, also named bioextrusion, is a reactive extrusion technique using enzymes as catalysts. Bioextrusion is considered as a link between the previous physico-chemical pretreatment (like alkaline extrusion) and the subsequent enzymatic hydrolysis in batch conditions. The extrusion allows a continuous, flexible and versatile process for high consistency media, easily transferable to the industrial level. However, complexity of both lignocellulosic biomass and lignocellulolytic enzymes and their interactions during the extrusion process are underlined by the literature. Numerous response surface methodology experiments with starchy biomass indicate that bioextrusion efficiency is mainly influenced by substrate and enzymes loading. Enzymatic activity during the bioextrusion process of lignocellulosic biomass is confirmed by the experiments despite the mechanical constraints and the limited residence time. During bioextrusion, best holocellulosic fraction hydrolysis results were obtained with high substrate and enzymes loadings. Significant modifications of the solid fraction like particule size reduction, visual deconstruction of the biomass structure, increased sensibility to thermal decomposition and the evolution of the surface exposure of crystalline and amorphous cellulose were observed. Enzymatic hydrolysis of the bioextrdates is prolonged in batch conditions. Clear improvements of speeds and rates of sugars conversion up to 48 h indicate a long term influence of the bioextrusion. Gain observed are steady for the pretreated wheat straw whereas it increases with time for corn residues and birch barks. Post-extrusion, a negative influence of the substrate loading is measured. However, best enhancements for the glucose conversion of pretreated wheat straw are detected for high substrate and enzymes loadings. From 4 to 48 h, significant losses in xylose conversion are measured with previous bioextrusion. Indicators of the solid fraction deconstruction, observed during the bioextrusion step, indicate a stronger biomass degradation after 48 h. Improvements of glucose conversion rates can be associated with good mixing conditions of the extruder, especially due to the use of kneading elements. Enzymes are probably more homogeneously distributed (distributive mixing) and can access more catalytic sites available. Moreover, dispersive mixing limits the enzyme jamming due to the biocatalysts concentration. Extrusion process permits an better agitation efficiency, good mass transfer conditions and probably a higher contact between substrate and enzymes. Lower xylose conversion results may be attributed to non-specific adsorptions or inactivation phenomena due to mechanical constraints and lignin residues. Good deconstruction results on the solid fraction may be associable with a synergetic action between mechanical and biochemical constraints. Autofluorescent signal analysis of the lignin fraction show its evolution during the deconstruction of the solid residue. During the hydrolysis, a progressive production of very small particles, appearing to be associated with the lignin fraction is observed. Lignin-carbohydrate complexes are also detected in the liquid fraction. These heteropolymeric complexes, difficult or even impossible for the enzymes to hydrolyze, are an obstacle to the biomass valorization. If lignin deconstruction is mainly due to the alkaline pretreatment, bioextrusion process seems to reduce the proportion of these heteropylymers with high molecular weights
Libros sobre el tema "Lignocellulosic biomass valorization"
Luque, Rafael, Christophe Len y Konstantinos Triantafyllidis, eds. Nano-(Bio)Catalysis in Lignocellulosic Biomass Valorization. Frontiers Media SA, 2019. http://dx.doi.org/10.3389/978-2-88945-772-4.
Texto completoZhang, Xiao, Angel Martinez, Pieter Bruijnincx, Claus Felby y Eiji Masai. Lignin Valorization: Emerging Approaches. Royal Society of Chemistry, The, 2018.
Buscar texto completoCapítulos de libros sobre el tema "Lignocellulosic biomass valorization"
Olatunji, O., S. Akinlabi y N. Madushele. "Application of Lignocellulosic Biomass (LCB)". En Valorization of Biomass to Value-Added Commodities, 3–19. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-38032-8_1.
Texto completoRadhakrishnan, Rokesh, Bhumika Shridhar y Amit Ghosh. "Laccase-mediated Pretreatment of Lignocellulosic Biomass". En Enzymes in the Valorization of Waste, 51–83. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003187714-3.
Texto completoDas, Arpan. "Valorization of Lignocellulosic Materials to Polyhydroxyalkanoates (PHAs)". En Lignocellulosic Biomass Production and Industrial Applications, 1–25. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2017. http://dx.doi.org/10.1002/9781119323686.ch1.
Texto completoSrivastava, Atul, Tanmay Rohit, Meenakshi Singh, Yaseera Bhombal, Sanjeet Mehariya, Obulisamy Parthiba Karthikeyan, K. Chandrasekhar y Murthy Chavali. "Lignocellulosic Biomass Valorization and Fate of Recalcitrant". En Clean Energy Production Technologies, 1–30. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-4316-4_1.
Texto completoGhosh, Vijayalakshmi. "Nanotechnological Advancements for Enhancing Lignocellulosic Biomass Valorization". En Valorization of Biomass Wastes for Environmental Sustainability, 99–113. Cham: Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-52485-1_5.
Texto completoIenczak, Jaciane Lutz, Patrícia Poletto, Diogo Robl y Sarita Cândida Rabelo. "Transforming the Lignocellulosic Biomass into High Value-Added Bioproducts". En Bio-valorization of Waste, 21–51. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-9696-4_2.
Texto completoAransiola, E. F., T. D. Shittu, T. F. Oyewusi, A. O. Adetoyese, O. S. Fagbeyiro y U. P. Eyibio. "Lignocellulosic Pretreatment Methods for Bioethanol Production". En Valorization of Biomass to Value-Added Commodities, 135–62. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-38032-8_8.
Texto completoBlasio, Cataldo De, Gabriel Salierno y Karhan Özdenkci. "Lignocellulosic Biomass for Biofuels Production, an Integrated Approach". En Enzymes in the Valorization of Waste, 23–49. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003187714-2.
Texto completoCecilia, J. A., C. P. Jiménez-Gómez, C. García-Sancho y P. Maireles-Torres. "Microbial Degradation of Lignocellulosic Biomass to Obtain High Value-Added Products". En Bio-valorization of Waste, 283–314. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-9696-4_13.
Texto completoOsorio-González, C. S., M. Chaali, K. Hegde, S. K. Brar, A. Kermanshahipour y A. Avalos-Ramírez. "Production and Processing of the Enzymes from Lignocellulosic Biomass". En Valorization of Biomass to Value-Added Commodities, 221–43. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-38032-8_11.
Texto completoActas de conferencias sobre el tema "Lignocellulosic biomass valorization"
Ghosh, Saugata, Ramesh Timsina y Britt Moldestad. "Study of gasification behavior for a biorefinery lignin waste in a fluidized bed gasification reactor". En 63rd International Conference of Scandinavian Simulation Society, SIMS 2022, Trondheim, Norway, September 20-21, 2022. Linköping University Electronic Press, 2022. http://dx.doi.org/10.3384/ecp192042.
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