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Showing 1 to 20 of 47 for “"Fixed Bed Reactor"”.
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A CFD Model for a Fixed Bed Reactor for Fischer Tropsch Reaction using Ansys
… greenhouse gases minimum. Among various types of reactors used for commercial FT, fixed bed tubular reactors are among the most common type of reactor. However, there is a big challenge faced by these tubular reactors. FT is a highly exothermic process and therefore, heat removal in these reactors …
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Dimerization of naphtha-range Fischer-Tropsch olefins into diesel-range products over zeolite H-ZSM-5 and amorphous silica-alumina
… was carried out in a tubular, continuous flow fixed-bed reactor, in the liquid phase, over zeolite H-ZSM-5 and an amorphous silica-alumina (ASA) catalyst. Both catalysts were in the form of extrudates.
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ΜΕΛΕΤΗ ΤΗΣ ΔΙΑΣΠΑΣΕΩΣ ΤΗΣ ΠΡΟΠΑΝΟΛΗΣ-2 ΣΕ ΑΠΛΟΥΣ ΚΑΙ ΜΕΙΚΤΟΥΣ ΚΑΤΑΛΥΤΕΣ ΕΠΙ ΦΟΡΕΟΣ SILICA
… WERE DETERMINED AT VARIOUS TEMPERATURES IN A FIXED BED REACTOR WORKING UNDER ATMOSPHERIC PRESSURE. (SHORTENED)
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Reaction of meta-diisopropylbenzene on acid molecular sieves and synthesis of zeolites by a vapor phase transport method
… at temperatures around 463 K in a flow-type fixed-bed reactor. A small amount of cracking is observed. The main reactions of meta-diisopropylbenzene are isomerization and alkylation. This alkylation is proposed as a new test reaction to characterize the effective size of the voids in larger …
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Design and testing of an integrated catalytic membrane reactor for deoxygenating water using hydrogen for down-hole injection and process applications.
… They were characterised and tested in membrane reactors by feeding hydrogen saturated water under varying operating conditions and the results compared to that of a fixed-bed reactor. The catalytic activities of the different membranes resulted in different deoxygenating efficiencies. The 6000nm …
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Heterogeneous catalysis in the different reactor types on the examples of ethyl benzene to styrene, methane dehydroaromatization and propylene carbonate, methanol transesterification
… above mentioned projects. Different types of reactors for heterogeneous catalysis were applied in this work – fixed and fluidized bed rectors as well as a riser reactor. Many parameters as e.g. contact times, temperature control, catalyst regeneration procedure etc. can be varied and adjusted …
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Zur Mikro- und Makrokinetik mehrphasiger heterogen-katalysierter Reaktionssysteme : Untersuchungen am Modellsystem der Ni-katalysierten Hydrierung von 1-Octen
… a commercially Ni-catalyst in a vibrating batch reactor was chosen as the model system. In such a system each mass transfer resistance can be defined stepwise and excluded by the systematical variation of the reaction condition (concentration of catalyst and octene, particle size). The effective …
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Investigation of the activity and selectivity of the MoO3/AI2O3 catalyst and the structural investigation using in-situ raman
… catalysts are activated at 550°C under N2 in a fixed bed reactor. The loading of the prepared catalysts was below and above monolayer capacity. It was observed that up to a loading 0.3 g Mo03 per g Ab03 the initial conversion increases more than proportional to the Mo03- loading. The catalysts …
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Studies of Carbon Dioxide Methanation and Related Phenomena in Porous Catalysts
… pressures using a gradientless, spinning-basket reactor operated in batch mode and in a laboratory-scale, continuous fixed-bed reactor. Langmuir-Hinshelwood kinetic models were developed to represent the observed kinetics in each reactor: these models were then compared. For the batch reactor, a …
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Structure sensitivity of H2/D2 Isotopic Exchange on Pt/Al2O3 catalysts
… Experiments were carried out in a quartz tubular fixed bed reactor coupled with a Mass Spectrometer to analyze the product gas by carrying out both, an integral analysis (from 0 to equilibrium conversion) by performing light-off experiments and differential analysis (low conversions) by performing …
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Co-pyrolysis of torrefied biomass and coal : product evaluation and reaction modelling
… and subsequently co-pyrolysis was conducted in a fixed bed reactor at variable mix ratios (25-75 wt.%), temperatures (400-600 °C) and pressures (1-30 bar) to investigate the extent of secondary- and synergistic reactions. The results showed that during co-pyrolysis, condensation and dehydration …
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Degradação termocatalítica de misturas de poliolefinas e biomassa
… polyethylene (HDPE) were carried out in a fixed bed reactor in order to evaluate the influence of pyrolysis temperature (450 to 500 °C) and flow of sweeping gas (N2) (50, 80 and 100 mL min-1 ) on the yields of collected product, residueand gas. The highestyield in collected product was …
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The use of ruthenium Y zeolite catalysts for the selective methanation of carbon monoxide
… wt.% Ru/Al₂O3. These catalysts were tested in a fixed bed reactor at temperatures between 160°C and 210°C at various space velocities with a feed composition of 1% CO, 20% CO2, 10% H2O, 59% H2 and 10% Ar. The effects of loading, space velocity and reaction temperature on the CO conversion and CO …
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Development and Application of in Situ/Operando Spectroscopic Techniques for Understanding Active Sites and Surface Intermediate Species in Heterogeneous Catalysis
… favored acetate production, consistent with fixed-bed reactor studies. Modulation frequency analysis further highlighted the relative speeds of ethoxy decomposition and acetaldehyde transformations. Isotopic kinetic studies on Au/TiO2 provided deeper mechanistic insights, confirming ethoxy …
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The aerobic, water-assisted selective oxidation of methane over platinum-based catalysts
… were investigated initially in a gas-phase, fixed bed reactor that is equipped with a steam generator. Initial results from the selective oxidation of methane yielded CO2. Accidentally flooding the reactor resulted in the formation of selective oxidation products such as methanol, …
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Production of lactic acid by microbial fermentation of hemicellulose sugars
… the immobilized enzyme (65 g) was packed in a fixed bed reactor with a permeable wall. The lactic acid productivity and yield in the novel bioreactor was higher than that of the control in both 20g/L and 50g/L xylose concentrations. The cells grew much quicker and better in the novel bioreactor …
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ENGINEERING NI/AL2O3 CATALYSTS BY ATOMIC LAYER DEPOSITION FOR METHANE REFORMING
… hollow fibers for DRM. The design of a fixed bed reactor and better distribution of gas flow in the reactor could significantly improve the performance of Ni/Al<sub>2</sub>O<sub>3</sub>-HF catalysts by reducing the void space.</p> <p>ALD-prepared ultrathin ZrO<sub>2</sub> or …
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Flow-through membrane microreactor for intensified heterogeneous catalysis
… of process intensification several innovative reactor types for heterogeneous catalysis are discussed, including membrane reactors, microreactors and monolithic reactors. A novel reactor concept called flow-through catalytic membrane microchannel reactor contains aspects of each of the three …
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