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Dissertations / Theses on the topic 'Lignocellulosic biomass'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Girisuta, Buana. "Levulinic acid from lignocellulosic biomass." [S.l. : Groningen : s.n. ; University Library Groningen] [Host], 2007. http://irs.ub.rug.nl/ppn/304751316.

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2

Brandt, Agnieszka. "Ionic liquid pretreatment of lignocellulosic biomass." Thesis, Imperial College London, 2012. http://hdl.handle.net/10044/1/9166.

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This thesis is concerned with the thermal treatment of lignocellulosic biomass using ionic liquids for the purpose of comminution via dissolution, for fractionating the biological composite and for obtaining aqueous solutions of carbohydrate monomers from the pulp via enzymatic hydrolysis. A major focus was the relationship between the choice of the anion and the effectiveness of the treatment. The synthesis of a range of 1-butyl-3-methylimidazolium ionic liquids with strongly hydrogen-bond basic anions was accomplished. Selected, process-relevant physicochemical properties were measured, such

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3

Samad, Abdul. "SOPHOROLIPID PRODUCTION FROM LIGNOCELLULOSIC BIOMASS FEEDSTOCKs." OpenSIUC, 2015. https://opensiuc.lib.siu.edu/theses/1799.

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The present study investigated the feasibility of production of sophorolipids (SLs) using yeast Candida bombicola grown on hydrolysates derived lignocellulosic feedstock either with or without supplementing oil as extra carbon source. Several researchers have reported using pure sugars and various oil sources for producing SLs which makes them expensive for scale-up and commercial production. In order to make the production process truly sustainable and renewable, we used feedstocks such as sweet sorghum bagasse, corn fiber and corn stover. Without oil supplementation, the cell densities at th

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4

Borén, Eleonora. "Off-gassing from thermally treated lignocellulosic biomass." Doctoral thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-141921.

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Off-gassing of hazardous compounds is, together with self-heating and dust explosions, the main safety hazards within large-scale biomass storage and handling. Formation of CO, CO2, and VOCs with concurrent O2 depletion can occur to hazardous levels in enclosed stored forest products. Several incidents of CO poisoning and suffocation of oxygen depletion have resulted in fatalities and injuries during cargo vessel discharge of forest products and in conjunction with wood pellet storage rooms and silos. Technologies for torrefaction and steam explosion for thermal treatment of biomass are under

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5

Corredor, Deisy Y. "Pretreatment and enzymatic hydrolysis of lignocellulosic biomass." Diss., Manhattan, Kan. : Kansas State University, 2008. http://hdl.handle.net/2097/693.

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6

Håseth, Jenny Kristin. "Decrystallization of Lignocellulosic Biomass using Ionic Liquids." Thesis, Norges Teknisk-Naturvitenskaplige Universitet, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-21106.

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This thesis is written in fulfilment of the requirements for a Master in Science at the Norwegian University of Science and Technology (NTNU), Department of Chemical Engineering. The work investigates the effectiveness of pretreatment of norway spruce and sugarcane bagasse with the ionic liquid 1-ethyl-3-methylimidazolium acetate ([EMIM][OAc]). The effect of pretreatment temperature and reaction time was evaluated. Enzymatic hydrolysis yield was used as the main evaluation parameter. Norway spruce was pretreated at 80, 100, and 120 °C for 3, 6, 12, and 24 hours. The sugarcane bagasse raw

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7

Frazão, Cláudio José Remédios. "Challenges of ethanol production from lignocellulosic biomass." Master's thesis, Universidade de Aveiro, 2014. http://hdl.handle.net/10773/13657.

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Mestrado em Biotecnologia - Biotecnologia Industrial e Ambiental<br>The present work aimed to tackle two of the major challenges in bioethanol production from lignocellulosic feedstocks: (i) high tolerance of microorganisms to lignocellulosic inhibitors, and (ii) microbial contamination avoidance. Lignocellulosic inhibitors are an important fraction of spent sulphite liquor (SSL), a by-product of the pulp and paper industries. Hardwood SSL (HSSL) is rich in pentose sugars, mainly xylose, which can be converted to ethanol by the yeast Scheffersomyces stipitis. In this work, a population of S.

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8

Gan, Jing. "Hydrothermal conversion of lignocellulosic biomass to bio-oils." Diss., Kansas State University, 2012. http://hdl.handle.net/2097/13768.

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Doctor of Philosophy<br>Department of Biological and Agricultural Engineering<br>Wenqiao Yuan<br>Donghai Wang<br>Corncobs were used as the feedstock to investigate the effect of operating conditions and crude glycerol (solvent) on bio-oil production. The highest bio-oil yield of 33.8% on the basis of biomass dry weight was obtained at 305°C, 20 min retention time, 10% biomass content, 0.5% catalyst loading. At selected conditions, bio-oil yield based on the total weight of corn cobs and crude glycerol increased to 36.3% as the crude glycerol/corn cobs ratio increased to 5. Furthermore, the opt

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9

Lopes, André Miguel da Costa. "Pre-treatment of lignocellulosic biomass with ionic liquids." Master's thesis, Universidade de Aveiro, 2012. http://hdl.handle.net/10773/9521.

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Mestrado em Biotecnologia<br>O objetivo deste trabalho foi estudar o pré-tratamento de biomassa lignocelulósica, como a palha de trigo, usando líquidos iónicos (LIs) de modo a obter a separação dos principais componentes, nomeadamente, celulose, hemicelulose e lignina. O processo de pré-tratamento foi otimizado com base em duas metodologias descritas na literatura utilizando o líquido iónico acetato de 1-etil-3-metilimidazólio ([emim][CH3COO]). A metodologia otimizada permitiu separar as frações ricas em hidratos de carbono das frações de lignina, ambas com elevada pureza, e com uma recuperaç

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10

Busby, David Preston. "The cost of producing lignocellulosic biomass for ethanol." Master's thesis, Mississippi State : Mississippi State University, 2007. http://library.msstate.edu/etd/show.asp?etd=etd-07052007-124350.

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11

Tyufekchiev, Maksim V. "Reaction Engineering Implications of Using Water for the Conversion of Lignocellulosic Biomass." Digital WPI, 2019. https://digitalcommons.wpi.edu/etd-dissertations/563.

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Conversion of lignocellulosic biomass via hydrolysis of cellulose to simple sugars has failed to achieve economic competitiveness to produce renewable fuels and chemicals partly due to the inherent recalcitrance of the substrate and partly due to the use of non-recyclable catalysts. Solid acids have been proposed for cellulose hydrolysis as a recyclable alternative to enzymes and homogeneous acids. However, their catalytic mechanism has not been elucidated partly due to incomplete structural characterization. We focused on elucidating the structure of chloromethyl polystyrene based catalysts w

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12

Gupta, Shelaka. "Catalytic conversion of biomass-derived platform molecules : mechanistic insights, fundamental challenges and opportunities for rational catalyst design." Thesis, IIT Delhi, 2019. http://eprint.iitd.ac.in:80//handle/2074/8074.

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13

Mu, Wei. "Aqueous phase processing of lignocellulosic biomass for biofuel production." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/53075.

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This thesis studied the catalytic upgrading of pyrolysis oil derived from both ethanol organosolv (EOL) lignin and whole biomass. There are four major components of this thesis. In the first part, several lignin model compounds and the commonly used noble metal catalysts were evaluated. During the reaction, coke formation deactivated several catalysts. The reaction pathway of the coke formation was proposed. Ruthenium/activated carbon can hydrogenate the aromatic ring and remove the methoxyl group as well due to its unique catalytic behavior. The reaction mechanism was deduced based on the pro

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14

Queirós, Carla Sofia Gonçalves Pereira. "Lignocellulosic biomass for a new generation of thermal fluids." Doctoral thesis, ISA/UL, 2019. http://hdl.handle.net/10400.5/18319.

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Doutoramento em Engenharia Florestal e dos Recursos Naturais - Instituto Superior de Agronomia / UL<br>The increasing demand for fossil fuels, conjugated with the decreasing in oil reserves, led to a sharp rise of chemicals and materials derived from petroleum. Resulting in an increase desire from industry to seek for sustainable and alternative sources for key commodity chemicals or suitable equivalents Plant biomass represents one of the most important renewable energy sources for Europe, however much of the lignocellulosic biomass is often disposed of by burning, even in the rich and develo

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15

Samayam, Indira Priya. "Characterization and Saccharification of Ionic Liquid Pretreated Lignocellulosic Biomass." University of Toledo / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1313700629.

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16

Wood, Brent E. "Improving Klebsiella oxytoca for ethanol production from lignocellulosic biomass." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0011422.

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17

Lanigan, Brigid. "Microwave processing of lignocellulosic biomass for production of fuels." Thesis, University of York, 2010. http://etheses.whiterose.ac.uk/1237/.

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Current environmental issues and resource demands are driving the global development of renewable energy. The work described in this thesis applies green and energy efficient microwave technology to transform lignocellulosic biomass into solid and liquid fuels suitable for application in coal burning power plants or upgrading into transportation fuels. Current thermochemical biofuel production (e.g. pyrolysis and gasification) suffer many drawbacks such as high energy consumption and poor flexibility. Herein, it is shown that by applying novel low temperature microwave processing, fuels can be

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18

Valenzuela, Mariefel Bayta. "Batch Aqueous-phase Reforming of Lignocellulosic Biomass for Hydrogen Production." Thesis, Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/11624.

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Aqueous-phase reforming (APR) is reported for the first time for the production of H2 from actual biomass. The experiments are carried out in batch using a 100mL Parr microreactor heated to 225C. In this one-pot, two-step process, acid hydrolysis is used to break down the polymeric constituents of biomass to smaller soluble molecules and these species are reformed using a Pt/Al2O3 catalyst. The experiments show that increasing the acid concentration from 1% to 5% causes more than a twelve-fold increase in H2 concentration, with hydrogen a minor product accounting for 18% of the non-condensable

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19

Dutta, Baishali. "Assessment of Pyrolysis techniques of lignocellulosic biomass for Biochar production." Thesis, McGill University, 2010. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=95255.

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Biomass pyrolysis at temperatures above 300°C, with the biochar being returned to the soil is a possible strategy for climate change mitigation and reducing fossil fuel consumption. In this study, an attempt has been made to develop a finite element model (FEM) in order to couple thermal heating and heat and mass transfer phenomena during pyrolysis. This numerical modelling and simulation approach helped the visualization of the process and optimized the production of biochar. In this work, cylindrical sections of birch wood biomass were pyrolysed in a laboratory-scale thermal desorption unit.

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20

Liew, Lo Niee. "Solid-state Anaerobic Digestion of Lignocellulosic Biomass for Biogas Production." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1306870552.

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21

Maddi, Balakrishna. "Pyrolysis Strategies for Effective Utilization of Lignocellulosic and Algal Biomass." University of Toledo / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1418340334.

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22

Maitan-alfenas, Gabriela Piccolo. "Enzymatic hydrolysis of lignocellulosic biomass for second generation ethanol production." Universidade Federal de Viçosa, 2014. http://www.locus.ufv.br/handle/123456789/6684.

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Submitted by Amauri Alves (amauri.alves@ufv.br) on 2015-11-16T11:43:38Z No. of bitstreams: 1 texto completo.pdf: 3547883 bytes, checksum: d0ecea27278208d99b9477d7546e1251 (MD5)<br>Made available in DSpace on 2015-11-16T11:43:38Z (GMT). No. of bitstreams: 1 texto completo.pdf: 3547883 bytes, checksum: d0ecea27278208d99b9477d7546e1251 (MD5) Previous issue date: 2014-11-18<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>A produção de etanol de segunda geração apresenta grande potencial para ser uma realidade sustentável, especialmente no Brasil que prossui grandes quantida

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23

Jones, Rudy. "Enhanced ethanol production: In-situ ethanol extraction using selective adsorption." Thesis, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/22658.

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In order to produce ethanol derived from lignocellulosic feeds at a cost that is competitive with current gasoline prices, the fermentation process, converting sugars to produce ethanol and the subsequent purification steps, must be enhanced. Due to their comparatively lower costs, the widespread availability across a range of climates, and their status as a dedicated energy crop, lignocellulosic biomass feeds are ideal raw materials that can be used to produce domestic fuels to partly displace our dependence on non-renewable sources. Currently, a major drawback of the technology is the relat

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24

Dodo, Charlie Marembu. "Ethanol production from lignocellulosic sugarcane leaves and tops." Thesis, University of Fort Hare, 2014. http://hdl.handle.net/10353/d1019839.

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Various methods for the production of bioethanol using different feedstocks have been researched on. In most work on bioethanol synthesis from sugar cane, tops and leaves have been regarded as waste and generally removed and thrown away. In this work, lignocellulosic sugarcane leaves and tops were not discarded but instead used as biomass to evaluate their hydrolyzate content. The leaves and tops were hydrolysed using different methods, namely concentrated acid, dilute acid pre-treatment with subsequent enzyme hydrolysis and compared with a combination of oxidative alkali pretreatment and enzy

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25

Ricciotti, Federica. "Plasma based pretreatments of lignocellulosic biomass for Biogas and Bioethanol production." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018.

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The aim of this project provides the use of a lignocellulosic biomass microbubble reactor in order to analyse the pre-treatment of cellulose and maize for, respectively, Bioethanol and Biogas production. Because of lignin recalcitrance, dielectric barrier discharge plasma is used to improve the solubility and accessibility of these feedstock. The novel reactor combined with this plasma source generates highly oxidative species (O3, H2O2, and OH radicals) close to the gas-liquid interface. The cellulose has been treated under different conditions such as treatment time (30 min, 60 min, 90 min a

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26

Zhu, Li. "Fundamental study of structural features affecting enzymatic hydrolysis of lignocellulosic biomass." Texas A&M University, 2005. http://hdl.handle.net/1969.1/4314.

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Lignocellulose is a promising and valuable alternative energy source. Native lignocellulosic biomass has limited accessibility to cellulase enzyme due to structural features; therefore, pretreatment is an essential prerequisite to make biomass accessible and reactive by altering its structural features. The effects of substrate concentration, addition of cellobiase, enzyme loading, and structural features on biomass digestibility were explored. The addition of supplemental cellobiase to the enzyme complex greatly increased the initial rate and ultimate extent of biomass hydrolysis by convertin

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27

Gourlay, Keith Ian. "The role of amorphogenesis in the enzymatic deconstruction of lignocellulosic biomass." Thesis, University of British Columbia, 2014. http://hdl.handle.net/2429/50850.

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Agricultural and forestry-derived fibres can be converted into fuels and chemicals via a biorefinery. However, the densely-packed fibrillar architecture of lignocellulosic biomass makes the cellulose inherently inaccessible to the enzymes involved in this bioconversion process. This limits the efficiency of enzymatic deconstruction and necessitates relatively high enzyme/protein loadings, which decreases the economic viability of the overall process. It has previously been suggested that the rate-limiting step of cellulose hydrolysis is not the depolymerisation of the carbohydrate chains, b

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28

Rengel, Ana. "Study of Lignocellulosic Biomass Pyrolysis : State of the Art and Modelling." Thesis, KTH, Industriell ekologi, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-32757.

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Fast pyrolysis is a technology that is emerging as an alternative to transform organic and fossil materials into a new form of energy, mainly the so-called bio-oil. Until nowadays, examples of raw materials that have been experimented are wood and forest residues, bagasses as well as straw and agro-residues. After pyrolysis conversion, the final products are solids (char), liquids (tar) and gases. Through several experimental studies, authors have been found that there are parameters which influence final products quality. They are feedstock composition, type of reactor, final temperature, hea

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29

João, Karen Andreína Godinho. "Pre-treatment of different types of lignocellulosic biomass using ionic liquids." Master's thesis, Faculdade de Ciências e Tecnologia, 2013. http://hdl.handle.net/10362/10386.

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Dissertação apresentada na Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa para obtenção do grau Mestre em Biotecnologia<br>The pre-treatment of biomass by ionic liquid (IL) is a method opening new possibilities of biomass fractionation for further valorisation of low value feedstock. This work is dedicated to study on the pre-treatment and fractionation of different types of lignocellulosic biomass into its major constituent fractions (cellulose, hemicellulose and lignin), using ILs. The biomass tested was: wheat straw, sugarcane bagasse, rice straw and triticale. Initially,

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30

Avery, Greg M. "A Life Cycle Assessment of Ionic Liquid Pretreatment for Lignocellulosic Biomass." University of Toledo / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1481273168926691.

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31

Giuliano, Aristide. "Process optimization of a lignocellulosic multi-product biorefinery." Doctoral thesis, Universita degli studi di Salerno, 2016. http://hdl.handle.net/10556/2364.

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2014 - 2015<br>A methodology to reduce the complexity of the process optimization was applied to multiproduct biorefinery fed by lignocellulosic biomass. A process superstructure was built to consider alternative process pathways to levulinic acid, succinic acid and ethanol. A Mixed Integer Non-Linear Problem was obtained and transformed in a Mixed Integer Linear Problem by means of a discretization procedure of the non-linear variables. Rigorous design methods accounting for complete kinetics schemes for hydrolysis and fermentation reactors for the production of levulinic acid, succinic acid

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32

Narayana, Swamy Naveen. "Supercritical Carbon Dioxide Pretreatment of Various Lignocellulosic Biomasses." Ohio University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1269524607.

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33

Abels, Christian [Verfasser]. "Membrane separations in ionic liquid assisted processing of lignocellulosic biomass / Christian Abels." Aachen : Hochschulbibliothek der Rheinisch-Westfälischen Technischen Hochschule Aachen, 2014. http://d-nb.info/1059535912/34.

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34

Berg, Heidi Odegård. "Comparison of conversion pathways for lignocellulosic biomass to biofuel in Mid-Norway." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for energi- og prosessteknikk, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-22375.

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This work investigates one biochemical and one thermochemical biomass-to-liquid biofuel conversion pathway in terms of lignocellulose conversion to liquid Fischer-Tropsch diesel. The focus has been on comparing the two conversion pathways in terms of identifying their energy flows and respective feed to fuel ratios. The conversion pathways investigated comprise two-stage conversion sequences including biomass-to-gas conversion and gas-to-liquid conversion, exerted by anaerobic digestion or gasification followed by Fischer-Tropsch synthesis. A systematic documentation of available technologies

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35

Yan, Lishi. "Kinetic characterization of hot water and dilute acid pretreatment of lignocellulosic biomass." Thesis, Washington State University, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3628899.

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<p> Acidic aqueous-phase pretreatment is a promising approach that has been directed at maximizing intermediates yields (e.g. sugars, sugar degradation products, and lignin) from biomass for fuel and chemical production. This dissertation explores the kinetic fundamentals of biomass hydrolysis in acidic aqueous-phase with different catalysts (e.g. sulfuric acid, metal chlorides), operating conditions (e.g. temperature, time pressure), and equipment configurations (e.g. batch, flowthough). </p><p> The kinetic analysis revealed that crystalline cellulose is insusceptible to hydrolysis compare

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36

Godoy, Jayfred Gaham Villegas. "Sorghum improvement as biofuel feedstock: juice yield, sugar content and lignocellulosic biomass." Thesis, Kansas State University, 2011. http://hdl.handle.net/2097/9254.

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Master of Science<br>Department of Agronomy<br>Tesfaye Tesso<br>Sorghum [Sorghum bicolor (L.) Moench] is listed as one of the potential feedstock sources for biofuel production. While sorghum grain can be fermented into ethanol in a similar way as maize, the greatest potential of the crop is based on its massive biomass and sugar rich juices. Thus development of the crop as alternative energy source requires improvement of these traits. The objectives of this study were (1) to determine the mode of inheritance of traits related to ethanol production and identify suitable genetic sources for us

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37

Tyufekchiev, Maksim V. "Reaction Engineering Implications of Using Water for the Conversion of Lignocellulosic Biomass." Digital WPI, 2020. https://digitalcommons.wpi.edu/etd-dissertations/619.

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Conversion of lignocellulosic biomass via hydrolysis of cellulose to simple sugars has failed to achieve economic competitiveness to produce renewable fuels and chemicals partly due to the inherent recalcitrance of the substrate and partly due to the use of non-recyclable catalysts. Solid acids have been proposed for cellulose hydrolysis as a recyclable alternative to enzymes and homogeneous acids. However, their catalytic mechanism has not been elucidated partly due to incomplete structural characterization. We focused on elucidating the structure of chloromethyl polystyrene based catalysts w

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38

Marriott, Poppy. "Identifying novel genes to improve lignocellulosic biomass as a feedstock for bioethanol." Thesis, University of York, 2014. http://etheses.whiterose.ac.uk/7156/.

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The dwindling reserves of fossil fuels, coupled with the environmental consequences of burning these fuels, mean that a more sustainable alternative is required. Bioethanol produced from lignocellulosic biomass is an attractive candidate for the replacement of liquid transportation fuels. Lignocellulosic biomass is composed of plant cell walls, which are extremely resistant to digestion. Converting this biomass to fermentable sugars for bioethanol production therefore requires energetic pretreatment and expensive enzyme applications. To make lignocellulosic bioethanol a commercial reality, the

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39

Melloni, Mattia <1989&gt. "From Lignocellulosic Biomass to Rare Sugars: Hydrolisis and Isomerization with Heterogeneous Catalysts." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amsdottorato.unibo.it/8056/1/Melloni_Mattia_tesi.pdf.

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The PhD project presented in this thesis focused on two research topics turned to contribute to the development of a modern model of production, that is able to reduce the environmental impact of the chemical industry. For this purpose, preparation and characterization of heterogeneous catalysts for the transformation of renewable raw materials into valuable chemicals has been studied. The first part of the work concerned the conversion of lignocellulosic biomass, the most abundant renewable source presents on Earth, into monosaccharides and bio-building blocks, such as HMF, furfural and levu

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40

Gogar, Ravikumar Leelamchand. "Economic Production of Furans from Lignocellulosic Sugars." University of Toledo / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1595977336480846.

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41

Mutengwe, Rudzani Ruth. "Isolation and characterisation of a xylanase producing isolate from straw-based compost." Thesis, University of the Western Cape, 2012. http://hdl.handle.net/11394/4495.

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>Magister Scientiae - MSc<br>Lignocellulosic biomass, a waste component of the agricultural industry, is a promising source for use in bioethanol production. Due to a complex structure, the synergistic action of lignocellulosic enzymes is required to achieve complete digestion to fermentable sugars. This study aimed to isolate, identify and characterise novel lignocellulase producing bacteria from thermophilic straw-based compost (71°C). Colonies with different morphological characteristics were isolated and screened for lignocellulosic activity. A facultative aerobic isolate RZ1 showed xylana

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42

Aghazadeh, Mahdieh. "The Effect of Different Lignocellulosic Biomass and Different Pretreatment Methods on Cellulase Activity." Fogler Library, University of Maine, 2011. http://www.library.umaine.edu/theses/pdf/AghazadehM2011.pdf.

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43

Dong, Jie. "Butanol Production from Lignocellulosic Biomass and Agriculture Residues by Acetone-Butanol-Ethanol Fermentation." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1404312445.

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44

Costa, da Cruz Ana Rita. "Compositional and kinetic modeling of bio-oil from fast pyrolysis from lignocellulosic biomass." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSE1006/document.

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La pyrolyse rapide est une des voies de conversion thermochimique qui permet la transformation de biomasse lignocellulosique en bio-huiles. Ces bio-huiles, différentes des coupes lourdes du pétrole ne peuvent pas être directement mélangés dans les procédés de valorisation. En effet, en raison de leur forte teneur en oxygène, les bio-huiles nécessitent une étape de pré-raffinage, telle que l’hydrotraitement, pour éliminer ces composants.L’objectif de ce travail est de comprendre la structure, la composition et la réactivité de la bio-huile grâce à la modélisation de données expérimentales. Pour

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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.

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Le monde, et en particulier l'Europe, fait face aux effets du changement climatique dus à sa longue dépendance aux combustibles fossiles en reconnaissant la nécessité vitale de s'orienter vers des ressources énergétiques renouvelables. Parmi les énergies renouvelables, la biomasse alimente non seulement la production de bioénergie, mais constitue également une source vitale de biocarbone, utilisé pour créer des molécules à haute valeur ajoutée, en remplacement des produits d'origine fossile. Les lévulinates d'alkyle, dérivés de la biomasse, se distinguent particulièrement par leur potentiel en

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Martinez, Aguilar Maricelly. "Production de biobutanol à partir de lignocellulose : un nouveau procédé thermochimique A simple process for the production of fuel additives using residual lignocellulosic biomass Production of fuel additives by direct conversion of softwood bark using a cheap metal salt Conversion of lignocellulosic biomass in biobutanol by a novel thermal process." Thesis, Ecole nationale des Mines d'Albi-Carmaux, 2020. http://www.theses.fr/2020EMAC0006.

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La demande d'énergie au cours des dernières années a augmenté et un grand pourcentage de l'énergie est dérivée des combustibles fossiles, mais l'utilisation de ces carburants a généré des émissions de CO2 et de la pollution environnementale. Pour ce problème, on a mené des recherches sur l'utilisation des énergies alternatives à partir de biomasse lignocellulosique pour produire des carburants qui réduisent les émissions de CO2. Le Canada est un pays avec une abondance de résidus lignocellulosiques qui sont une source pour la production de différents produits chimiques. La première partie de l

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Peña, Duque Leidy E. "Acid-functionalized nanoparticles for hydrolysis of lignocellulosic feedstocks." Thesis, Kansas State University, 2009. http://hdl.handle.net/2097/2201.

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Master of Science<br>Department of Biological and Agricultural Engineering<br>Donghai Wang<br>Acid catalysts have been successfully used for pretreatment of cellulosic biomass to improve sugar recovery and its later conversion to ethanol. However, use of acid requires a considerable equipment investment as well as disposal of residues. Acid-functionalized nanoparticles were synthesized for pretreatment and hydrolysis of lignocellulosic biomass to increase conversion efficiency at mild conditions. Advantages of using acid-functionalized metal nanoparticles are not only the acidic properties to

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Kučera, Dan. "Využití lignocelulózových materiálů k biotechnologické produkci polyhydroxyalkanoátů." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2015. http://www.nusl.cz/ntk/nusl-217161.

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Tato diplomová práce se zabývala možnostmi utilizace lignocelulosového materiálu jako obnovitelného zdroje k produkci polyhydroxyalkanoátů (PHA) biotechnologickými metodami. Teoretická část práce se zaměřuje na charakterizaci rostlinné odpadní biomasy, její enzymatickou sacharifikaci a možnosti produkce a izolace hydrolytických enzymů. Dále se pak literární rešerše zabývá bakteriální produkcí PHA a možností využití lignocelulosové biomasy pro jejich produkci. V rámci experimentální části byly vybrané odpadní substráty hydrolyzovány chemickou a enzymatickou cestou. Jako odpadní substráty byly p

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Ndimande, Sandile. "Increasing cellulosic biomass in sugarcane." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/86296.

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Thesis (PhD)--Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: Increased demand of petroleum, declining fossil fuel reserves, geopolitical instability and the environmentally detrimental effects of fossil fuels have stimulated research to search for alternative sources of energy such as plant derived biofuels. The main feedstocks for production of first generation biofuels (bioethanol) are currently sucrose and starch, produced by crops such as sugarcane, sugarbeet, maize, and cassava. The use of food crop carbohydrates to produce biofuels is viewed as competing for limited agronomic resour

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Moharreri, Ehsan. "Optimization, Scale Up and Modeling CO2-Water Pretreatment of Guayule Biomass." University of Akron / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=akron1313013654.

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