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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 35 for “"Biomass conversion"”.
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Biomass conversion in oleaginous yeasts
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-08-01
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Tailored heterogeneous catalysts for biomass conversion
… to address pressing challenges in sustainable biomass conversion. The introductory chapter outlines the importance of catalysis in advancing sustainable technologies, highlighting the need for catalysts that balance high activity, selectivity, and stability under challenging reaction …
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Catalytic biomass conversion and upgrading into platform chemicals and liquid fuels
… novel, efficient catalytic processes for plant biomass conversion and upgrading into versatile platform chemicals as well as oxygenated biodiesel and premium hydrocarbon kerosene/jet fuels is described in this dissertation. The chief motivation of using annually renewable biomass as the source …
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Molybdenum trioxide and molybdenum carbide as promising hydrodeoxygenation catalysts for biomass conversion
… concerns due to rising CO2 emissions have made biomass an indispensable source of renewable fuels and chemicals. However, biomass inherently has high oxygen content, which translates to low energy density, thereby necessitating a deoxygenation step before being utilized as fuels. Recently, MoO3 …
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Rational design and synthesis of zeolite acid catalysts for applications in biomass conversion
… of carbon efficient and economically viable biomass conversion technologies is crucial for the sustainable production of fuels and chemicals. Catalytic upgrading processes must remove oxygen and add hydrogen while targeting oxygen-containing functional groups. Catalysts must be …
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Understanding the role of local condensed phase environments in pyrolytic and catalytic biomass conversion
Biomass conversion generally involves two major sets of chemical transformations – (1) thermal breakdown of macromolecules in the feedstock, such as cellulose, to smaller sugars and oxygenates via fast pyrolysis followed by (2) catalytic upgrading to the desired fuels or precursor chemicals. These …
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Thermo-Chemical Conversion of Lignocellulosic Biomass to Liquid Biofuels
<p>The thermo-chemical conversion of biomass to hydrocarbons has been investigated for decades as an alternative to using petroleum-derived fuels. Equipment and feedstock have improved, but, biomass conversion efficiency and bio-oil quality still remain challenges. This study aims to investigate …
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FAST-PYROLYSIS OF BIOMASS RELATED MODEL COMPOUNDS: A NOVEL APPROACH TO EXPERIMENTAL STUDY AND MODELING
… a potentially attractive method for converting biomass to a low energy-density liquid (bio-oil) that can be further upgraded for use as fuel. Currently there is no agreement concerning the reaction pathways and mechanisms for pyrolysis of any individual component of biomass. This information is …
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High Pressure Micro-Scale Studies of Fast-Hydropyrolysis and Catalytic Hydrogenation of Biomass and Related Model Compounds
Biomass is a major source of renewable carbon which can be converted to hydrocarbon fuel with the aim of reducing the dependence on fossil based sources. Fast pyrolysis of biomass followed by catalytic hydrodeoxygenation of bio-oil is considered a promising biomass conversion route to produce drop …
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Density Functional Theory Calculations Complement Mass Spectrometry Experiments in the Investigation of Biomass Fast Pyrolysis and Ion-Molecule Reaction Mechanisms
Biomass fast-pyrolysis, or the rapid heating in the absence of oxygen, is a promising method for biomass conversion necessary for a renewable energy economy. Although kinetic models of cellulose pyrolysis have existed since the 1970s, current models and hypothesized reaction networks fail to …
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Biomass characterization and reduced order modeling of mixed-feedstock gasification
… the differences and similarities between biomass and coal, with emphasis on the state of the art in biomass pyrolysis/devolatilization modeling. An existing coal Entrained Flow Gasification (EFG) Reduced Order Model (ROM) was expanded to more accurately simulate the gasification of a mixed …
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Catalytic Conversion of Cellulose to Carboxylic Acids through Aqueous Phase Partial Oxidation
… of the twenty first century. Cellulosic biomass, is inexpensive, available regionally, and considered to be the feedstock of choice for producing alternative liquid fuels and green chemicals. However, cellulosic biomass conversion is not without inherent challenges: a refractory …
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Design of a mobile torrefaction reactor for in-situ conversion of agricultural waste to solid biofuel
Significant volumes of biomass waste are generated each year as a result of agricultural practices in India. Despite the negative environmental impacts, in-situ incineration of crop residues is common practice for disposal of this waste. Transportation of raw biomass accounts for a significant …
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Optimization of an integrated grain-biomass-ethanol supply chain with event-based decision-making
… of renewable technologies. When considering biomass for fuel production, farm and distribution management become key in turning such renewable alternatives into successful large-scale systems. This research effort proposes an integrated approach to a grain-biomass-ethanol supply chain, with …
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Cooperative activation of biomass-derived oxygenates with Lewis acid zeolites
… are versatile catalysts for the activation and conversion of oxygenated molecules owing to the unique Lewis acid character of their tetrahedral metal sites. Through fluoride-mediated synthesis, hydrophobic Lewis acid zeolites can behave as water-tolerant catalysts, which has resulted in a recent …
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Ethanol from photoperiod-sensitive sorghum: a study on biomass structure and process optimization
… ethanol made from low cost lignocellulosic biomass has been considered as new generation transportation fuel with economic and environmental advantages. Photoperiod-sensitive (PS) sorghum, because of its high biomass yield (2.6 kg dry mass/m2), about 18% of soluble sugar in dry mass, and …
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Physiological and behavioral consequences of reptilian life in the slow lane: Ecology of beaded lizards and rattlesnakes.
… low energy requirements and high efficiencies of biomass conversion, few studies have addressed the ecology and energetics of species with very low activity levels. I investigated the ecology and energetics of two such reptilian groups: helodermatid lizards, and viperid snakes. I radiotracked …
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Structural studies on enzymes involved in uronic acid polysaccharide degradation
… pectate, alginate and ulvan represent a huge biomass with wide industrial applications. Bacteria that encounter GAGs and plant algal biomass express enzymes to degrade uronate polysaccharides as a source of nutrients. These enzymes are called polysaccharide lyases (PL) and degrade the uronate …
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Lignocellulose deconstruction using glyceline and a chelator-mediated Fenton system
Non-edible plant biomass (lignocellulose) is a valuable precursor for liquid biofuels, through the processes of pretreatment and saccharification followed by fermentation into products such as ethanol or butanol. However, it is difficult to gain access to the fermentable sugars in lignocellulose, …
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Characterization of Cellulase Enzyme Inhibitors Formed During the Chemical Pretreatments of Rice Straw
… and inexpensive resource such as lignocellulosic biomass is a lucrative and sustainable option for the advanced biofuel and bio-based chemical platform. Agricultural residues constitute the bulk of potential feedstock available for cellulosic fuel production. On a global scale, rice straw is the …
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