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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 26 for “"plug-flow reactor"”.
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PAH chemistry in a jet-stirred/plug-flow reactor system
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1993.
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Analysis of substrate limited fermentation in a dispersed plug-flow reactor
A tubular reactor, in which there is a dispersed plug-flow and in which a single cell fermentation occurs is critically analyzed using a lumped approximation technique. Estimates of the bounds of Fermentation Number where multiple solutions can occur and the necessary and sufficient conditions for …
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The formation of polycyclic aromatic hydrocarbons and soot in a jet-stirred/plug-flow reactor
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1989.
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An Experimental and Computational Investigation of Methane /Air Partial Oxidation
… and system contributions. A model using a plug flow reactor with variable heat transfer along the length was constructed and analyzed using CanteraRTM. Modeling confirmed the strong dependence of formaldehyde and hydrogen peroxide in controlling the ignition process. Studies indicated that …
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Reduced-Order Models for the Prediction of Unsteady Heat Release in Acoustically Forced Combustion
… is treated by beginning with general reacting flow equations, identifying a small subset of physics thought to be dominant in the corresponding regime, and making appropriate simplifications. Each model is non-dimensionalized and both naturally occurring and popular dimensionless parameters are …
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Investigations of biphasic seeded emulsion polymerizations in a continuous tubular reactor
… emulsion polymerization recipes into tubular reactors. While this transposition had been successful in producing low solids contents material, it failed at producing industrial-grade latex (>30 w%) due to the accumulation of solids (fouling) against the reactor’s inside wall that ultimately …
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The Simulation of a Controlled Tubular Reactor with Counter-current Heat Transfer
The results of complete simulation of a plug flow reactor and a cascade of five continuous flow stirred tank reactors (CSTR) on a digital computer under transient open loop and controlled conditions are compared with the experimental results of the same system partially simulated as a cascade of …
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Oxidation kinetics of methylphosphonic acid in supercritical water : experimental measurements and model development
… experimentally measured in a laboratory-scale plug flow reactor. The effects of MPA concentration (0.5 to 1.0 mM), oxygen concentration (1.0 to 3.8 mM), temperature (478 to 572⁰C) and pressure (138 to 277 bar) on oxidation rates were determined for residence times ranging from 3.0 to 9.5 s. …
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Exergetic Analysis Of Hydrogen Combustion Involving Electronically Excited Species
… This was accomplished by developing a plug flow reactor model using the chemical simulation tool CHEMKIN-PRO® in conjunction with a reaction mechanism which includes explicit reaction pathways for NTP.</p> <p> The primary results of the study identify an optimal range of exergetic …
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Novel supercritical biodiesel plant design & process scale-up
… are catalyzed processes using continuous stir reactors with distillation systems to separate material constituents. We tested a lab-scale nocatalyst supercritical biodiesel process using waste cooking oil and ethanol as feedstock. This led to the development of a scaled up modular EAC process …
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Chemical simulation of hydrogen generation in a plasma fuel reformer
… simulations. The goal was to characterize the reactor to be able to understand and predict its performance for a wide range of operating conditions, such as different flow rates, air to fuel flow ratio or power supply. The simulation tool used for this purpose was CHEMKIN 3.7. The fuel reformer …
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Stochastic modelling of silicon nanoparticle synthesis
… which solves networks of perfectly stirred reactors with a population balance model using the stochastic method. The algorithm is tested in some simple network configurations, which are used to identify methods through which error in the stochastic solution may be reduced. It is observed …
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Gravity selector-enabled kenaf recirculation and reuse as a renewable ballasting agent for sludge settleability enhancement in a municipal wastewater secondary process: A real wastewater pilot-scale study
… approaches. Hydrocyclone-enabled continuous flow densification has been applied for full-scale applications; however, it requires long startup times and, in some instances, results in poor stability of the densified floc. Migrating carriers hold promise to offset these disadvantages for …
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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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Alumina-supported palladium and palladium/copper catalysts: Characterization and use for selective hydrogenation of 1,3-butadiene
… palladium in a vapor-phase atmospheric plug flow reactor in the temperature range 299-313 K. Copper addition to alumina-supported Pd increases its selectivity for converting butadiene to n-butenes without saturating or isomerizing the n-butenes. For example, with a Cu/Pd atomic ratio of …
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Advances in Baffled and Railed Tube Ram Accelerator Operation and Modeling
… computational model, called the ram accelerator plug flow reactor (PFR) model, proved to be a significant advancement in the modeling of ram accelerator operation. The ram PFR model is a quasi-1D model that resolves the entire ram flowpath. It includes a model for the effects of baffles on the …
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Deactivation and regeneration of immobilized titanium dioxide photocatalysts during treatment of pharmaceutical micropollutants in groundwater
… on glass slides under UV-A light in a serpentine plug-flow reactor. Initially, catalysts achieved 50-75% degradation of influent PPCPs using a 2-hr reactor residence time (higher removal can be achieved using longer residence times). Over one month of continuous operation, catalyst films developed …
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CO2 monitoring by optical emission spectroscopy and mass spectrometry for CO2 plasmas
… at a pressure of approximately 1 Torr with a gas flow of 140 sccm containing helium, nitrogen, and carbon dioxide. Optical measurement monitored selected peaks from the CO Angstrom and N2 second positive spectroscopic systems. The measurement of CO from the OES and CO2 from the QMS methods are …
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Operational modes for effective recovery of energy from ryegrass using anaerobic digestion
… the use of conventional continuous stirred tank reactor (CSTR) digester design and from this began to focus on plug flow designs that could be simulated through a batch digestion model. Experimental work used a batch feed cycle to simulate a continuous fed plug flow reactor, although the results …
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Self-sustained combustion of low grade solid fuels in a stagnation-point reverse-flow combustor
… the use of the Stagnation-Point Reverse-Flow (SPRF) combustor geometry for burning low-grade solid fuels that are attractive for specific industrial applications because of their low cost and on-site availability. These fuels are in general, hard to burn, either because of high moisture …
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