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Showing 1 to 20 of 44 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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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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Design and investigation of renewable natural gas and methane production systems
… and experimental testing of a new helical fixed-bed reactor, as well as a production system to support and monitor the reactor. Additionally, the experimental system integrates gas bending and the recycling of the coolant working fluid to pre-heat the reactant molecules prior to entering …
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Synthesis, characterisation, and evaluation of supported cobalt molybdenum nitride for Fischer-Tropsch reaction
… CO hydrogenation activity was measured in a fixed bed reactor using various syngas compositions and temperatures at atmospheric pressure. The effect of nitridation conditions on catalytic properties of nitrides was investigated via 23 factorial design. It has revealed that nitridation …
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Thermo-Chemical Conversion of Lignocellulosic Biomass to Liquid Biofuels
… goal is to design and evaluate the new paths and reactors on biomass conversion and bio-oil upgrading. A proprietary fast pyrolysis reactor was used to carry out the study of thermo-chemical conversion of lignocellulosic biomass to raw bio-oil. This reactor converted biomass to bio-oil at a rate …
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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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