due to high applicability of the fixed bed catalytic naphtha reforming reactors, hydrodynamic features of this kind of reactors with radial flow pattern are improved in this work by utilising computational fluid dynamics technique. effects of catalytic bed porosity, inlet flow rate and flow regime through the bed on the flow distribution within the system are investigated.it is found that the f...

Manganese oxide catalyst promoted with sodium and supported on silica exhibits fairly good activity and selectivity towards the synthesis of ethylene from methane at the optimum operating conditions. Methane and oxygen were fed into a tubular fixed bed reactor packed with catalyst under atmospheric pressure. The effects of temperature, residence time and feed composition on conversion, selectiv...

In this study, the modeling of low-temperature catalytic abatement NOX and N2O from tail gases in a weak nitric acid plant utilizing single-pressure 0.716 MPa system was performed. A one-reactor concept assumes that first bed, is reduced by ammonia on commercial vanadia–alumina catalyst, second decomposed proprietary nickel–cobalt catalyst. The kinetics decomposition Cs/Ni0.1Co2.9O4 catalyst ex...

Distinguishing between photothermal and non-thermal contributions is essential in plasmon catalysis. Use of a tailored optical temperature sensor based on fiber Bragg gratings enabled us to obtain an accurate map illuminated plasmonic catalyst bed with high spatiotemporal resolution. Its importance for quantification the catalysis demonstrated using Ru/Al2O3 catalyst. Upon illumination LEDs, we...

The catalytic wet air oxidation (CWAO) of phenol has been studied in trickled bed reactor using 2 wt.% platinum supported on carbon nanofibers (Pt/CNF) as catalyst. The catalyst was prepared by incipient wetness impregnation, and characterized by N2 adsorption, XRD and TEM. The operational variables studied and their range were: total air pressure, temperature, catalyst load, air and liquid flo...

fischer-tropsch synthesis is a promising route for production of light olefins via co hydrogenation over transition metals. co is one of the most active metals for fischer-tropsch synthesis. some different variables such as preparation parameters and operational factors can strongly affect the selectivity of fischer-tropsch synthesis toward the special products. in the case of preparation varia...

the special application of iron-manganese oxide nanocatalysts has been investigated in decomposition of hydrogen peroxide. in this research, iron-manganese oxide nanocomposites were synthesized by co-precipitation, sol-gel and mechanochemical methods using iron (iii) nitrate, iron (ii) sulfate and manganese (ii) nitrate as starting materials. these nanocomposites were prepared on the various ca...

This paper reported an experimental research of steady-state heat transfer behaviour of a gas flowing through a fixed bed under the different operating conditions. Studies had been carried out in a fixed-bed packed methanol synthesis catalyst percolated by air at appropriate flow rate. Both radial and axial direction temperature distribution had been investigated under the different operating c...

The catalytic decomposition of ozone was carried out at 40 °C with a Pd/Al2O3 catalyst, in the presence or absence nitrogen oxides traces. NOx were produced during generation from air. Two set-ups used to examine possible effects poisoning, one fixed bed powder and another using monolith coated same catalyst. shown significantly poison resulting decrease conversion over time on stream. NOx-free...

the effects of confinement in carbon nanotubes on fischer-tropsch (ft) activity, selectivity and lifetime of carbon nanotubes (cnts) supported iron catalysts are reported. a method was developed to control the position of the catalytic sites on either inner or outer surface of carbon nanotubes. tem analyses revealed that more than 80% of iron oxide particles can be controlled to be positioned a...