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Showing 1 to 20 of 37 for “"packed-bed reactor"”.
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Multivariate Identification and Stochastic Control of A Pilot Plant Packed Bed Reactor
<p>The modelling and control of a pilot plant packed bed catalytic reactor is investigated. The reactions considered are those of the hydrogenolysis of n-Butane over a nickel on silica gel catalyst. These involve several independent species and are highly exothermic. A multivariate transfer …
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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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Methanol synthesis via CO2 hydrogenation: analysis and simulation of kinetic performance using typical industrial conditions
… bar). In addition, the H₂ to CO₂ ratio in the reactor feed that is used in industry is significantly higher than what was used to develop many of the kinetic experiments and associated models found in the literature review. This work explores the development of a methanol synthesis catalyst …
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Piezoelektrischer Schwermetallbiosensor mit Glutathion und Phytochelatin als Biokomponente
… mass changes. To obtain phytochelatin, a packed bed reactor filled with cross- and co-crosslinked phytochelatin-synthase (E.C.: 2.3.2.15) derived from Schizosaccharomyces pombe immobilised in alginate, PVA or sol-gel respectively was set up. An 18fold increase of the specific activity …
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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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