The mechanism and kinetic parameters of the interaction FLiNaK–CeF3 melt with water vapors oxygen in air atmosphere were determined using Raman IR spectroscopy, XRD analysis, thermodynamic modeling processes. presence 4CeF3(solution) + 6H2O (gas) O2(gas) = 4CeO2(solid) 12HF(gas) reaction, which disturbs fluoride homogeneity, was verified situ by spectroscopy adopted for high-temperature, chemic...

Effect of scale on the hydrodynamics of gas-solid fluidized beds was investigated in two fluidized beds of 152 mm and 78 mm in diameter.  Air at room temperature was used as the fluidizing gas in the bed of sand particles. The Radioactive Particle Tracking (RPT) technique was employed to obtain the instantaneous positions of the particles at every 20 ms of the experiments. These data were u...

phenytoine derivatives were synthesized , via the pinacol condensation with thereaction of 1,3- diphenyl- propane- 1,3- dione (benzyl) analogs with urea or thioureain presence of slica gel and solid KOH as Solid phase catalyst in the mortar / pestle atroom temperatures. The reaction was completed at short reaction times (approximately15min) and pure products were obtained with high yields (81-9...

In protoplanetary disks, zones of dense particle configuration promote planet formation. Solid particles in clouds alter their motion through collective effects and back reaction to the gas. The effect particle-gas feedback with ambient solid-to-gas ratios $\epsilon > 1$ on stopping time is investigated. experiments board International Space Station we studied evolution a granular gas while int...

The direct sulfation of three high purity Iranian limestones and one precipitated calcium carbonate from different sources, containing more than 97 % CaCO3, were studied in a specially designed fixed bed reactor under atmospheric pressure, in the presence of excess CO2 to prevent decomposition of CaCO3. Experiments were carried out over a range of particle s...

effect of scale on the hydrodynamics of gas-solid fluidized beds was investigated in two fluidized beds of 152 mm and 78 mm in diameter.  air at room temperature was used as the fluidizing gas in the bed of sand particles. the radioactive particle tracking (rpt) technique was employed to obtain the instantaneous positions of the particles at every 20 ms of the experiments. these data were used ...

computational fluid dynamics (cfd) simulations of gas-solid flow through a positive low-pressure pneumatic conveyor were performed using eulerian-eulerian framework. pressure drop in pneumatic conveying pipelines, creation and destruction of plugs along the horizontal and vertical pipes, effect of 90° elbows and u-bends on cross-section concentrations, and rope formation and dispersion were num...