Comparative Study of Different Two-Phase Models for the Propane Oxidative Dehydrogenation in a Bubbling Fluidized Bed Containing the VOx/γ-Al2O3 Catalyst

2021 ◽  
Author(s):  
Shayma A. Khraibet ◽  
Golshan Mazloom ◽  
Farhad Banisharif
Keyword(s):  
Comparative Study ◽  
Fluidized Bed ◽  
Oxidative Dehydrogenation ◽  
Propane Oxidative Dehydrogenation ◽  
Two Phase ◽  
Bubbling Fluidized Bed ◽  
Phase Models ◽  
Al2o3 Catalyst

scholarly journals Sensitivity Studies for Propane Oxidative Dehydrogenation to Propylene in Circulating Fluidized Bed

2006 ◽  
Vol 3 (1) ◽  
pp. 19 ◽  
Author(s):  
A.H. Fakeeha ◽  
M.A. Soliman ◽  
A.A. Ibrahim
Keyword(s):  
Fluidized Bed ◽  
Oxidative Dehydrogenation ◽  
Circulating Fluidized Bed ◽  
Circulation Rate ◽  
Propane Oxidative Dehydrogenation ◽  
Feed Composition ◽  
Solid Circulation Rate ◽  
Sensitivity Studies ◽  
Experimental Kinetics ◽  
Reactant Conversion

In this paper, simulation and sensitivity studies for propane oxidative dehydrogenation to which were propylene in a circulating fluidized bed is undertaken using a previously developed model. Various experimental kinetics, obtained by several investigators for the reaction using different catalysts, are employed in this study. A comparison is made for the performance of certain catalysts when used in a circulating fluidized bed reactor. The effects of changing reaction temperature, solid circulation rate, feed composition, pressure, and gas superficial velocity on reactant conversion and product selectivity and yields are studied. It was found that the catalyst prepared by Ramos et al. is superior to the others with respect to yield. 

scholarly journals Application of analytical and CFD models of liquid fuels combustion in a fluidized bed

2019 ◽  
Vol 23 (Suppl. 5) ◽  
pp. 1627-1636
Author(s):  
Milica Mladenovic ◽  
Stevan Nemoda ◽  
Milijana Paprika ◽  
Ana Marinkovic
Keyword(s):  
Fluidized Bed ◽  
Liquid Fuel ◽  
Combustion Process ◽  
Vertical Direction ◽  
Unsteady Motion ◽  
Cfd Modeling ◽  
Thermal Engineering ◽  
Two Phase ◽  
Bubbling Fluidized Bed ◽  
Two Fluid

In Laboratory for Thermal Engineering and Energy of Institute Vinca, University of Belgrade, a 2-D CFD modeling procedure of numerical simulation of unconventional liquid fuel combustion in bubbling fluidized bed has been developed. This procedure is based on a two-fluid Euler-Euler approach modeling a fluidized bed with the determination of the velocities field of gas and particulates in two-phase, granular flows, analog to the kinetic theory of gases. This model describes in detail the unsteady motion of gas and solid phases, the formation and movement of bubbles with the combustion process in the fluidized bed, but temperature profiles calculated by the bed height differ to some extent from the experimentally obtained profiles. This discrepancy is probably due to the inability of a two-fluid CFD model to give a realistic simulation of the liquid fuel mixing in a fluidized bed. Therefore, an analytical model has been developed, where one of the basic assumptions is that the particles are mixed in the vertical direction of fluidized bed mainly by the bubble wakes. The proposed zonal type of calculating procedure is based on Davidson and Harrison two-phase model of the bubbling fluidized bed, where fluidized bed is divided into zones within which material and energy balances are set.

scholarly journals The effect of numerical diffusion and the influence of computational grid over gas–solid two-phase flow in a bubbling fluidized bed

2010 ◽  
Vol 52 (9-10) ◽  
pp. 1390-1402 ◽  
Author(s):  
Meire Pereira de Souza Braun ◽  
Andreza Tangerino Mineto ◽  
Hélio Aparecido Navarro ◽  
Luben Cabezas-Gómez ◽  
Renato César da Silva
Keyword(s):  
Fluidized Bed ◽  
Two Phase Flow ◽  
Computational Grid ◽  
Phase Flow ◽  
Two Phase ◽  
Numerical Diffusion ◽  
Bubbling Fluidized Bed
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