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Showing 1 to 20 of 33 for “"packed-bed reactor"”.
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Analysis of Batch and Packed Bed Reactor Models for the Carbon-Chloraminereactions
Made available in DSpace on 2014-12-13T19:31:36Z (GMT). No. of bitstreams: 1 7714971.pdf: 4040695 bytes, checksum: f4a23e3d1f7c3e8792b600740a24336a (MD5) Previous issue date: 1977
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An Experimental Study of An Adiabatic Packed-Bed Reactor: Steady-State Multiplicity and Related Behavior
Made available in DSpace on 2014-12-10T21:24:52Z (GMT). No. of bitstreams: 1 7405738.pdf: 10616638 bytes, checksum: 4161f2a7273cdc5a5fd6dc7ce6a1de61 (MD5) Previous issue date: 1973
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Design, construction and commissioning of a packed bed reactor system for methane to methanol conversion
… as well as the presence of a promoter. Thus, a packed bed reactor system capable of safely operating under high pressures (< 50 bar) is designed and constructed to investigate the performance of platinum-based catalysts in the direct oxidative conversion of methane to methanol whilst co-feeding …
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Experimental and Modeling Studies of the Methane Steam Reforming Reaction at High Pressure in a Ceramic Membrane Reactor
… permeation and its application in a membrane reactor for the study of the methane steam reforming reaction. The investigations include both experimental studies of the membrane permeation mechanism and theoretical modeling of mass transfer through the membrane and simulation of the membrane …
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Methane partial oxidation over phthalocyanine catalyst
… phthalocyanine catalyst is studied in a packed bed reactor. The investigation of such reaction is desirable because partial oxidation of methane yields a synthesis gas that can be upgraded to liquid chemicals and fuels. Reactants of this study are He-diluted CH_4 and O_2. The effluent …
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Platinum group metals catalyzed steam methane reforming via micro-channel reactor
… By performing this reaction in micro-channel reactors it is possible to take advantage of increased heat and mass transfer rates, allowing equipment size and residence times to be decreased by an order of magnitude which, in turn, leads to the possible utilisation of small scale steam …
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Novel multiphase chemical reaction systems enabled by microfabrication technology
… and has been demonstrated in a microfabricated packed bed reactor. Owing to the high surface-to-volume ratios, micro chemical systems also have the potential to make improvements in process performance through enhanced heat and mass transfer.
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CO2 reduction over noble metal/carbon nanotube catalyst
… by flow rate. Based on data from an integral packed bed reactor, a simple power law model of CO_2 conversion indicates global reaction rates of DR and RWGS showing first order dependencies on each reactant. Linear Arrhenius plots of the global rate constants are also obtained. More robust …
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Reactor Design for Partial Upgrading of Bitumen via Aquaprocessing
… This thesis is focused on evaluating the reactor design parameters required for scale-up of this technology. The kinetic parameters for hydrocracking reaction were calculated using first-order rate law expression for the packed bed reactor. Diffusivity of steam in bitumen, dimensionless …
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A novel membrane process for autotrophic denitrification
… technical feasibility of a continuous bioreactor-membrane system for denitrification.</li> </ul> <p>The following kinetic coefficients were obtained: µ<sub>m</sub> of 0.65 d<sup>-1</sup>, Y of 0.78 mg cells/mg NO<sub>3</sub>-N, and k<sub>d</sub> of 0.04 d<sup>-1</sup>. The nitrate …
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Catalytic synthesis of biodiesel fuel under sub/supercritical conditions: kinetics and phase behavior
… reaction of oleic acid was carried out in a packed-bed reactor containing unmodified gamma-alumina. A kinetic study suggests that the mass transfer resistance of the esterification reaction was not significant. Both reaction systems were capable of converting the oil feedstocks to biodiesel …
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Chemical Looping Electricity Storage
… concept. To do so, a simplified model of a packed bed reactor is developed enabling faster analysis of different layouts and materials. The objective is to find layouts and material properties that are optimising the performance of the storage system including round-trip efficiency and …
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Novel Counterflow Reactor for Continuous Templated Synthesis of Semiconductor Nanocrystals
… scalable to a continuous synthesis utilizing a packed bed reactor operated in counterflow where the gas phase reactant enters from the bottom of the reactor while the microemulsion is fed from the top of the reactor causing a concentration gradient allowing for the most efficient and …
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Studies on Hydrogen Selective Silica Membranes and the Catalytic Reforming of CH₄ with CO₂ in a Membrane Reactor
… z 2 CO + 2 H₂) in a hydrogen separation membrane reactor. The silica membranes were prepared by chemical vapor deposition (CVD) of a thin SiO₂ layer on porous supports (Vycor glass and alumina) using thermal decomposition of tetraethylorthosilicate (TEOS) in an inert atmosphere. These membranes …
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Development of a Hydrogen Producing Thermal Control for Chemical Hydrogen Storage
… storage system. A cylindrical shaped “hybrid” reactor was created to allow hydrogen production from a sodium borohydride packed bed reactor and the metal hydride. Additionally, a custom built pressure-composition-temperature apparatus was built to record the amount of hydrogen desorption from …
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Advances in the Stille reaction and new methods for continuous flow Pd-catalyzed C-N bond forming reactions
… synthesis was made possible by integrating microreactors, liquid-liquid extraction, and microfluidic distillation. The microfluidic distillation enabled solvent exchange from CH2Cl2 in the first reaction step to N,N-dimethylformamide (DMF) in the final reaction step. Chapter 4: A method to …
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Studies of the Ethanol Steam Reforming Reaction in a Membrane Reactor
… membranes and their application in membrane reactors (MRs). The reaction studied is the ethanol steam reforming (ESR) reaction using Co-Na/ZnO catalysts, chosen because of their high activity and stability. The Co-Na/ZnO catalysts were prepared by a co-precipitation method and it was found …
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Mechanistic Study of Fouling and Regeneration of Palladium-Based Bimetallic Catalysts Used for the Removal of Pollutants From Drinking Water
… reduction with hydrogen in a continuous-flow packed-bed reactor. Results showed that the main products of nitrate reduction were ammonia and nitrogen, and the distribution was sensitive to solution conditions. Increases in solution pH, H2, and sulfide concentrations resulted in increases in …
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Characterising Adsorption and Mass Transfer in Porous Media
… correlation data of binary liquid mixtures imbibed in various silica supports. These measurements, in combination with a newly developed model for the relaxation of multi-component mixtures, have provided a comprehensive assessment of the ability of this technique to quantify intra-pellet …
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Combined Hydrogen and Oxygen transport membranes in the activation of Methane
… for CO oxidation on Pt. In a dual-chamber reactor, the use of H2/H2O flow in the sweep side, induced promoting species supply, to the catalyst in the reaction side of the reactor. Moderate promotion of the catalytic rate up to 10%, was observed for temperatures up to 650OC, while this …
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