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Full-Text Articles in Catalysis and Reaction Engineering
Hydrodynamics Of A Novel Design Circulating Fluidized Bed Steam Reformer Operating In The Dense Suspension Upflow Regime, Moataz Bellah M. Mousa, Seif-Eddeen K. Fateen, Essam A. Ibrahim
Hydrodynamics Of A Novel Design Circulating Fluidized Bed Steam Reformer Operating In The Dense Suspension Upflow Regime, Moataz Bellah M. Mousa, Seif-Eddeen K. Fateen, Essam A. Ibrahim
Seif-Eddeen K Fateen
Circulating fluidized bed steam reformers (CFBSR) represent an important alternative for hydrogen production, a promising energy carrier. Although the reactor hydrodynamics play crucial role, modeling efforts to date are limited to one-dimensional models thus ignoring many of the flow characteristics of fluidized-beds that have strong effects on the reactor efficiency. The flow inside the riser is inherently complex and requires at least two-dimensional modeling to capture its details. In the present work, the Computational Fluid Dynamics (CFD) simulations of the hydrodynamics of the riser part of a novel CFBSR were carried out using two-phase Eulerian-Eulerian approach coupled with kinetic theory …
A Kinetic Model For Ethylene Oligomerization Using Zirconium/Aluminum- And Nickel/Zinc-Based Catalyst Systems In A Batch Reactor, Adil A. Mohammed, Seif-Eddeen K. Fateen, Tamer S. Ahmed, Tarek M. Moustafa
A Kinetic Model For Ethylene Oligomerization Using Zirconium/Aluminum- And Nickel/Zinc-Based Catalyst Systems In A Batch Reactor, Adil A. Mohammed, Seif-Eddeen K. Fateen, Tamer S. Ahmed, Tarek M. Moustafa
Seif-Eddeen K Fateen
The aim of this work is to develop a kinetic model of the oligomerization of ethylene to Linear Alpha Olefins (LAOs) for zirconium/aluminum and nickel/zinc catalyst systems. The development of such model helps in the study of the behavior of industrial LAOs reactors as well as in the optimization of their operation. The kinetic model was developed based on a four-step mechanism: site activation, initiation and propagation, chain transfer and site deactivation. A novel stochastic optimization algorithm, Intelligent Firefly Algorithm, was used to obtain the kinetic model parameters that best fit the available experimental data that were obtained from published …
Hydrodynamic Characteristics Of A Novel Circulating Fluidized Bed Steam Reformer Operating In The Fast Fluidization Regime, Moataz Bellah M. Mousa, Seif-Eddeen K. Fateen, Essam A. Ibrahim
Hydrodynamic Characteristics Of A Novel Circulating Fluidized Bed Steam Reformer Operating In The Fast Fluidization Regime, Moataz Bellah M. Mousa, Seif-Eddeen K. Fateen, Essam A. Ibrahim
Seif-Eddeen K Fateen
Circulating Fluidized Bed Steam Reformers (CFBSRs) represent an important alternative for the production of syngas for the Fisher-Tropsch (FT) process and for hydrogen production. Most research regarding this novel CFBSRs did not consider its hydrodynamic characteristics. In this work, the riser Computational Fluid Dynamics (CFD) simulations were investigated using two phase Eulerian-Eulerian approach coupled with kinetic theory of granular flow with k-epsilon model to describe the turbulence of each phase. The model equations were solved via the commercial CFD package FLUENT, which uses the finite volume numerical approach. Cold flow simulations were carried out under the fast fluidization regime and …