Global ETD Search
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 62 for “"Chemical production"”.
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Optimizing selectivity and activity in heterogeneous and homogeneous catalysis for chemical production
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-05-01
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Metabolic engineering of yeast strains for renewable biomass utilization and valuable chemical production
… from renewable biomass and produce valuable chemicals. Sugars derived from lignocellulosic biomass, mainly cellobiose and xylose, cannot be assimilated by the industrial microorganisms, such as yeast Saccharomyces cerevisiae. To utilize cellobiose or xylose for the fuels and chemicals …
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Electrochemical wiring of cyanobacteria to anodes using polymers towards biohybrid devices for solar-chemical production
… technologies that convert solar energy to chemical energy will be crucial. Bio-photoelectrochemical devices using living microorganisms as catalysts for solar-fuel conversion could fill this gap. As a material, living microorganisms are abundant, capable of self-repair and reproduction, and …
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Immobilising and Interfacing Poly(Heptazine Imide) Ionic Carbon Nitride for Photo(electro)catalytic Fuel and Chemical Production
The production of fuels and other value-added chemicals from sunlight is one of the proposed sustainable pathways to fulfil the constantly increasing energy demand while pushing towards a carbon-neutral circular economy. Photocatalytic (PC) and photo(electro)catalytic (PEC) systems, based on a …
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Development of a Acrylonitrile Butadiene Styrene toner for an electrophotography based additive manufacturing process
… route. The study is comprised for two parts; Chemical and Mechanical toner production. The chemical production method utilises a process, Evaporative Limited Coalescence, to produce an engineering toner in the desired 20-50μm range. It was found that during the chemical production process the …
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Comparison of Scheduling Algorithms for a Multi-Product Batch-Chemical Plant with a Generalized Serial Network
… scheduling methodologies developed for batch-chemical production are seldom applied in industry (Musier & Evans 1989 and Grossmann et al. 1992). Scheduling decisions may have significant impact on overall company profitability by defining how capital is utilized, the operating costs required, …
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Influence of recent Asian SO₂ and Asian NOx̳ emissions change (2001 to 2010) on particulate matter : shifts in Asian sulfate enhancement over US surface, major production pathway, and lifetime
A 3-D chemical transport model with coupled oxidant-aerosol chemistry (GEOSChem) is used to analyze the influence of recent (2001 to 2010) growth in Asian NOx and Asian SO 2 emission on transpacific transport of Asian particulate matter, especially sulfate, by quantifying and analyzing the details …
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Analysis and cost versus reliability in a multi-echelon supply chain for a chemical plant
… managing various types of uncertainty within a chemical production/inventory system. Later the company can use it to minimize the total cost at any required Cycle Service Level (CSL) under variable demand and production reliability. To solve this problem, we will base historical data to estimate …
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Using chemical catalysis to select and diversify biological-derived intermediates
Technology development for biorenewables fuel and chemical production is a critical direction. To effectively produce chemicals from biomass feedstock, strategies to convert complex lignocellulose structures to downstream products are required. In this work, we studied the conversion route designs …
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Automatic and adaptive preprocessing for the development of predictive models.
… initiated due to a joint research project with a chemical production company, which has provided several datasets with common raw data issues in the process industry. The final part of this thesis evaluates the feasibility of applying such automatic techniques for building and maintaining …
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Synthetic sensing systems in Saccharomyces cerevisiae
The yeast Saccharomyces cerevisiae is a major chemical production platform in the biotechnological industry. It is also increasingly being used as a whole cell biosensor. One method of developing such whole cell biosensors in yeast is by exploiting its mating pathway, which is normally induced by …
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Systems Engineering for Carbon Capture and Storage
… capturing CO2 from power plants, ammonia, and chemical production facilities and utilizing onshore pipelines and saline aquifers offer high utility and low cost. The Gulf Coast and Permian & Midcontinent regions show better performance due to existing infrastructure and storage capacity. The …
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Lignocellulosic fermentation of Saccharomyces cerevisiae to produce medium chain fatty alcohols
… change have made the need to develop sustainable production practices for biofuels and other chemicals imminent. The development of the green economy has also led to many industries voluntarily improving the sustainability of the products they produce. The microbial production of fatty …
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A computational study of acidic Ionic Liquids for cellobiose hydrolysis in ionic liquids
… on the development of green fuel and platform chemical production methods. In this context, processes that utilise biomass sources as feedstock, are of great interest. Cellulose, which is the most abundant biopolymer in nature, is a renewable low–cost carbon resource derived from harvest …
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Quantifying Localized Muscle Fatigue of the Forearm during Simulations of High Pressure Cleaning Lance Tasks
… high pressure cleaning lance tasks common in the chemical production industry. Twenty participants, twelve males and eight females, with no musculoskeletal injuries and meeting criteria for upper extremity fitness, performed the simulated task. Independent variables studied include work height …
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CRISPR-based Control of Biosynthetic Pathways and Genetic Biosensors, Informed by a Quantitative Investigation of Metabolic Burden
… engineered genetics often used for biosynthetic chemical production share resources with host gene expression. While the host’s endogenous expression has evolved along with complex regulatory networks to balance supply and demand, or cost and benefit, heterologous expression requires engineered …
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Process design, dynamics, and techno-economic analysis of a sustainable coal, wind, and small modular nuclear reactor hybrid energy system
… utilization of carbon dioxide emissions for the production of synthetic gas which can be used in the production of transportation fuels or chemicals.</p> <p>The coal and nuclear systems were first analyzed at steady state by utilizing the Aspen Plus simulation software. The two systems were …
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Developing electrochemical methodologies towards addressing challenges in flow energy conversion technologies
Electrolyzer technologies for sustainable fuel production face critical catalyst optimization challenges, particularly in developing energy-efficient alternatives to the oxygen evolution reaction that dominates electrolyzer energy consumption. This dissertation presents electrochemical …
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An Integrated Process for Catalytical Conversion of Simple Sugars into Platform Chemicals, HMF and FDCA: Catalysis, Continuous Flow Reactor Design, Valorization of Waste By-Product
… as glucose and fructose, into bio-based platform chemicals plays a crucial role in advancing sustainable chemical production. 5-Hydroxymethylfurfural (HMF) and 2,5-furandicarboxylic acid (FDCA) are particularly valuable due to their potential as renewable substitutes for petroleum-derived …
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Improvements to our Understanding of Toronto-area Atmospheric Composition
… over the Toronto area.The relative influence of chemical production and direct emissions on Toronto-area O3 and CO were determined using GEOS-Chem model simulations. 28 pollution events (defined as enhanced O3 or CO lower-tropospheric (0-5 km) columns that coincided with surface O3 exceedances) …
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