Fluidized-Bed Reactor for the Intensification of Gas-Phase Photocatalytic Oxidative Dehydrogenation of Cyclohexane

2010 ◽  
Vol 49 (21) ◽  
pp. 10279-10286 ◽  
Author(s):  
Vincenzo Palma ◽  
Diana Sannino ◽  
Vincenzo Vaiano ◽  
Paolo Ciambelli
Keyword(s):  
Gas Phase ◽  
Fluidized Bed ◽  
Oxidative Dehydrogenation ◽  
Fluidized Bed Reactor ◽  
Dehydrogenation Of Cyclohexane

scholarly journals Improved Performances of a Fluidized Bed Photoreactor by a Microscale Illumination System

2009 ◽  
Vol 2009 ◽  
pp. 1-7 ◽  
Author(s):  
Paolo Ciambelli ◽  
Diana Sannino ◽  
Vincenzo Palma ◽  
Vincenzo Vaiano ◽  
Roberto S. Mazzei
Keyword(s):  
Fluidized Bed ◽  
Oxidative Dehydrogenation ◽  
Fluidized Bed Reactor ◽  
Optical Path Length ◽  
Optical Path ◽  
Oxidation Reactions ◽  
Illumination System ◽  
Dehydrogenation Of Cyclohexane ◽  
Uv Lamps ◽  
Selective Oxidation Reactions

The performances of a gas-solid two-dimensional fluidized bed reactor in photocatalytic selective oxidation reactions, irradiated with traditional UV lamps or with a microscale illumination system based on UV emitting diodes (UVA-LEDs), have been compared. In the photocatalytic oxidative dehydrogenation of cyclohexane to benzene on catalyst the use of UVA-LEDs modules allowed to achieve a cyclohexane conversion and benzene yield higher than those obtained with traditional UV lamps. The better performances with UVA-LEDs are due to the UVA-LEDs small dimensions and small-angle emittance, which allow photons beam be directed towards the photoreactor windows, reducing the dispersion outside of photoreactor or the optical path length. As a consequence, the effectively illuminated mass of catalyst is greater. We have found that this illumination system is efficient for photo-oxidative dehydrogenation of cyclohexane to cyclohexene on sulphated and ethanol to acetaldehyde on .

Oxidative Dehydrogenation ofn-Butane in a Two-Zone Fluidized-Bed Reactor

1999 ◽  
Vol 38 (1) ◽  
pp. 90-97 ◽  
Author(s):  
J. Soler ◽  
J. M. López Nieto ◽  
J. Herguido ◽  
M. Menéndez ◽  
J. Santamaría
Keyword(s):  
Fluidized Bed ◽  
Oxidative Dehydrogenation ◽  
Fluidized Bed Reactor

Gas phase hydrodynamics of a gas-solid turbulent fluidized bed reactor

1996 ◽  
Vol 51 (5) ◽  
pp. 713-723 ◽  
Author(s):  
M. Foka ◽  
J. Chaouki ◽  
C. Guy ◽  
D. Klvana
Keyword(s):  
Gas Phase ◽  
Fluidized Bed ◽  
Fluidized Bed Reactor ◽  
Turbulent Fluidized Bed

Cold-Model Study on Fluidized-Bed Photo-Oxidation Reactor for Shenfu Coal

2011 ◽  
Vol 201-203 ◽  
pp. 2741-2744
Author(s):  
Ya Ting Zhang ◽  
Guang Heng Wang ◽  
Wei Zhao ◽  
An Ning Zhou
Keyword(s):  
Particle Size ◽  
Gas Phase ◽  
Fluidized Bed ◽  
Fluidized Bed Reactor ◽  
Pipe Diameter ◽  
Flow State ◽  
Cold Model ◽  
Photo Oxidation ◽  
Model Study ◽  
Oxidation Reactor

The flow state of both the solid and gas phase in the fluidized-bed photo-oxidation reactor for Shenfu coal was studied by cold-model tests. The results showed that the appropriate pipe diameter, particle size of coal, and the coal addition for the gas-solid fluidized-bed reactor were 22 mm, 60-80 mesh, and 10g, respectively.

The Phase Transformations during Fluidized-Bed Combustion of Biomass

2013 ◽  
Vol 419 ◽  
pp. 366-369 ◽  
Author(s):  
Hai Peng Teng ◽  
Bin Yang ◽  
Bin Liang
Keyword(s):  
Gas Phase ◽  
Fluidized Bed ◽  
Solid Phase ◽  
Fluidized Bed Reactor ◽  
Biomass Combustion ◽  
Material Surface ◽  
Fluidized Bed Combustion ◽  
Biomass Ash ◽  
Equilibrium Modeling ◽  
Bed Material

FactSage6.1 was used to study the phase transformation at high temperature when biomass combustion in a fluidized bed reactor. The results show that eutectic was formed during the reaction process, the eutectics are formed mainly by the reaction between the silica in bed particles and the alkali species in biomass ash. The solid phase transformed to melt layer on the surface of sands particle mainly contains potassium, some calcium and magnesium, and also a few phosphorus and chlorine are found in the melt layer. The result utilizing FactSage equilibrium modeling shown that the distribution ratio of potassium in the gas phase increased with the increase of temperature, moreover, the melt of bed material surface increased when defluidized occurred.

MoO3/MgO as a catalyst in the oxidative dehydrogenation of n-butane in a two-zone fluidized bed reactor

2000 ◽  
Vol 61 (1-4) ◽  
pp. 101-107 ◽  
Author(s):  
M.L Pacheco ◽  
J Soler ◽  
A Dejoz ◽  
J.M López Nieto ◽  
J Herguido ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Oxidative Dehydrogenation ◽  
Fluidized Bed Reactor
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