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 39 for “"Flow reactors"”.
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Adaptive Finite Element Computation of Chemical Flow Reactors
The main interest in the simulation of flow reactors is the comprehension of the complex interplay between flow, mixing processes and reaction processes. To describe the chemical and physical processes taking place in reactive flows, many chemical species are to be considered with often a few …
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Parameter estimation and optimal experimental design in flow reactors
… element method, for the simulation of reactive flows in a chemical flow reactor as well as for the identification of the kinetic of the reactions using measurements of observable quantities. We present the case of a real experiment in which the reaction rate is estimated by means of …
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Design of Flow Reactors for the Continuous Synthesis of Nanoparticles
… errors associated with representing the flow equations in discrete form. It is discovered that a higher specific contact area between two streams in mixers, namely mixing potential, leads to more generated nuclei on the interface and smaller Au NPs. The flow synthesis of perovskite …
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The use of immobilised crown ethers as in-situ protecting groups for organic synthesis within flow reactors
… protocols conducted in micro and continuous flow reactors. Utilising the high surface to volume ratio obtained under these reaction conditions, greater reaction control of many common and specialised organic syntheses has been reported. Building upon literature precedent, the work herein …
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Part I: Palladium PEPPSI-IPENT CI, A Useful Catalyst for Challenging Amination Reactions Part II: Generation Of Benzynes in Flow Reactors followed by Subsequent Diels-Alder Reactions
… (TBAF) as the benzyne-forming trigger in the flow system. The numerous advantages of microfluidic devices enabled the formation of these species at room temperature which were immediately trapped in Diels-Alder reactions with five-membered heterocyclic dienes to generate bicyclic alkenes of …
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Polymerisation of vinyl monomers in continuous-flow reactors. An experimental study, which includes digital computer modelling, of the homopolymerisation of styrene and methylmethacrylate by anionic and free radical mechanisms respectively in continuous flow-stirred-tank reactors.
… in each type of polymerisation, polymerisation reactors, computer simulation of polymerisation processes and polymer characterisation by gel permeation chromatography. A novel computer model has been devised, based on the analysis of the polymerisation process in terms of the reaction extent of …
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Continuous synthesis of metal halide perovskite nanoparticles with sharp and stable emission
… tunability and phase purity using continuous flow reactors and the stability improvement of CsPbX<sub>3</sub> nanocrystals (NCs). The controllable synthesis is achieved by reactor engineering, and the importance of mass transport in the synthetic processes is revealed. The stability …
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Modeling Powdered Activated Carbon Performance in Membrane Filtration Systems
… of the activated carbon to continuous-flow reactors installed upstream of the membranes, and the recirculation to a floc blanket reactor after backwash results in significantly lower carbon dose for a given adsorbate removal.
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Application of additives in horseradish peroxidase-catalyzed removal of phenol derivatives from aqueous solution.
… Although the model is obtained from batch reactors, it can also be applied to plug flow reactors and continuous stirred tank reactors as well. Experiments prove that there is no need to stir the reaction mixture during the entire reaction period. Batch reactors and plug flow reactors have …
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Pretreatment and biodegradation of wastewater from a textile dyeing and finishing industry
… treatment was performed in bench-scale reactors to determine the biological kinetic coefficients of the wastewater so that the overall efficiency and performance of the biological treatment system might be improved. Effluent toxicity of the wastewater was also evaluated in hopes that …
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Invention and implementation of technologies for continuous flow synthesis
… was synthesized in three steps, but in two flow reactors where one of the reactors induced two steps. The reaction mixture was then purified using two in-line aqueous extrations. First, the reaction stream was washed with HCl to produce the salt of nicardipine and wash away polar compounds. …
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Comparative phosphorus removals using modified activated sludge processes
The operation of three continuous flow units as modified activated sludge models using mean cell residence time as a principal operational parameter has led to the following conclusions: 1. Lower mean cell residence times result in higher phosphorus removal efficiencies in biological reactors. 2. …
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Acyltransferase LovD as a Simvastatin Synthase: Mutational Deconvolution, Design, Substrate Scope and Immobilization
… synthesis of simvastatin using continuous flow reactors with potential interest for industrial production, were optimized.
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A study of nitrate versus oxygen respiration in the activated sludge process
… sludge process. Two bench-scale continuous flow reactors were operated over a range of mean cell residence times with organic carbon as the limiting nutrient. Alkalinity changes were monitored and compared with theory. Engineering applications of the results were discussed. The maximum …
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A new diagnostics tool for water injected gas turbines - emissions monitoring and modeling
… reactor network consisting of perfectly stirred reactors and plug flow reactors to represent the turbine combustion in both the primary and dilution zones. Changes in the measured emissions of certain species combined with a detailed kinetics model are used to indicate the onset of problems in …
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Friedel-crafts acylation reactions using heterogeneous catalysts stimulated by microwave radiation
… experiments were performed in both batch and flow reactors. Under both reactor configurations microwave stimulation gave consistent increases in catalyst activity. Attempts were made to correlate this with the material dielectric properties, unfortunately, no correlation was found. Under the …
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Studies of multiphase distribution and flow in bubble/ slurry bubble columns with /without internals and advanced sustainable construction materials using sophisticated measurement techniques
… been widely studied and employed as multiphase flow reactors with and without vertical heat-exchanging tubes. In order to understand more deeply the effect of the dense internals on the hydrodynamics of bubble/slurry bubble column, systematic experiments were performed to visualize and quantify …
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The influence of cations on activated sludge behavior
… and batch study. In re- actor study continuous-flow reactors were operated. Variables used included varying types of substrate, addition of magnesium or sodium, and changes in pH. The batch study included conditioning tests on the sludges with combinations of cationic polymer and salts. …
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Photochemical Methods for the Construction of C-C and C-X Bonds
… between aldehydes and alkylarenes in continuous flow. In the process, the reaction was adapted to a flow set-up, further optimised and expanded to prepare a range of α-aryl ketones including drug derivatives. Furthermore, the application of flow reactors towards multi-gram scale-up was …
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Atmospheric Chemistry of Volatile Organic Compounds: Oxidation Products, Mechanisms and Secondary Organic Aerosol Formation
… VOC) were studied in the G-FROST and Go:PAM flow reactors to characterize their oxidation and the subsequent SOA-forming processes. Previously unknown compounds including dimer esters, carboxylic acids, nitrates and highly oxygenated molecules were identified using state-of-the-art mass …
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