Progress in CFD Simulations of Fluidized Beds for Chemical and Energy Process Engineering

Alobaid, Falah; Almohammed, N.; Farid, Massoud Massoudi; May, Jan; Rößger, Philip; Richter, Andreas; Epple, Bernd

doi:10.1016/j.pecs.2021.100930

Cited by 121 publications

(41 citation statements)

References 1,233 publications

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“…In Figure 9 it is reported the average volumetric flow inside the reactor. This is calculated based on the average gas velocity inside the reactor, by applying the following script (which has been inserted in ParaView calculator tool, Sandia National Laboratories, Kitware Inc., Los Alamos National Laboratory, Los Alamos, NM, USA): mag(Gas Velocity) × D2 × π/4 × 1000 × 60 (30) the Gas Velocity variable is a vector, for this reason it is required to perform the module of it (see the command "mag"). D is the diameter expressed in meters (the value in millimeters is reported in Table 5).…”

Section: Resultsmentioning

confidence: 99%

“…A recent review on CFD modeling of fluidized beds further underlines the complexity of this field [30]. This paper aims at presenting an innovative and simple approach, respect to the different strategies which can be found in the literature, to model the fuel reactor biomass pyrolysis (primary and secondary reactions), char gasification, water-gas shift and metal oxide reduction.…”

Section: Advancement On Cfd Models On Chemical Looping Combustionmentioning

confidence: 99%

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CFD Modelling of the Fuel Reactor of a Chemical Loping Combustion Plant to Be Used with Biomethane

et al. 2022

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To realize a carbon negative power production technology, it is interesting the option of coupling a Chemical Loping Combustor to a gas turbine. The development of this technology foreseen in the project GTCLC-NEG has some technical barriers, the most important of which is the operation of the chemical looping combustor at high temperature and high pressure conditions. To overcome these limits CFD modeling can be performed to optimize the behavior of the combustor and its design process. This work models the FUEL reactor of a chemical looping combustion plant working in batch mode and based on the reactor available at the Instituto de Carboquimica in Zaragoza, Spain. It is used an oxygen carrier mainly based on 60% mass Fe2O3 and 40% mass Al2O3. Biomethane is fed to the bottom of the fluidized bed with different velocities and mass flows and the composition of the gases at the outlet of the fuel reactor is measured. The results show that it is possible to model a 2 min duration reduction cycle by running the model for a time comprised between a minimum of 4 h and a maximum of 2 days of simulation. Another important result is the modeling of the chemical reactions happening in the reactor. Kinetics is modelled based on Activation energy (66 kJ/mol) and Pre-exponential factor (4.34 × 101 m3n mol−n s−1). The simple kinetic scheme gives reasonable first approximations and can be used to determine the duration of the reaction, the composition of the exhaust gases and the biofuel conversion.

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Section: Resultsmentioning

confidence: 99%

Section: Advancement On Cfd Models On Chemical Looping Combustionmentioning

confidence: 99%

CFD Modelling of the Fuel Reactor of a Chemical Loping Combustion Plant to Be Used with Biomethane

et al. 2022

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“…Different multiphase flow modeling approaches such as Eulerian-Eulerian [26][27][28][29], Eulerian-Lagrangian [30][31][32], and mixture model [3,15,33] have been utilized. Recently, Messa and Matoušek [34] and Alobaid et al [35] presented a comprehensive description and comparison of the multiphase modeling approaches.…”

Section: Gillies and Shookmentioning

confidence: 99%

“…The kinetic theory of granular flow is usually coupled with the Eulerian-Eulerian model to capture the effects of particles interactions on the flow field. This approach makes the consideration of chemical reactions and mass transfer between the phases possible, and offers a relatively good compromise between the computational cost and accuracy [35]. In the Eulerian-Lagrangian scheme, the particles, droplets or bubbles (based on the type of the secondary phase) are tracked individually, and Newton's law of motion is applied to each particle.…”

Section: Gillies and Shookmentioning

confidence: 99%

CFD Simulation of Turbulent non-Newtonian Slurry Flows in Horizontal Pipelines

Sadeghi

Zheng

et al. 2022

Ind. Eng. Chem. Res.

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Understanding the flow behavior of complex concentrated slurries is of tremendous importance for industrial waste management. In this study, the transport of three-phase oil sands tailings in a horizontal pipeline is simulated via the mixture multiphase model coupled with the kinetic theory of granular flow. The solid particles and bitumen droplets are conveyed via a non-Newtonian carrier fluid in a turbulent regime inside an industrial-scale pipeline. The simulation results showed exceptional agreement with the field data, with errors of < 3.5% for velocity distribution and < 15% for the pressure drop.A systematic parametric investigation was performed for a wide range of flow conditions, showing that the majority of bitumen droplets reside at the top region of the pipe.Our findings may help design an effective process for the separation of bitumen residues during pipeline transport.

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“…25 Using existing experimental data from the literature, 26–29 the accuracy of the CFD model prediction of flow behavior in multiphase flow reactors has been statistically confirmed. The progress of CFD simulation of fluidized bed reactors was reviewed by Alobaid et al 30 The CFD simulation approaches for gas–solid flow systems are broadly classified into Eulerian–Lagrangian (E–L) and Eulerian–Eulerian (E–E) approaches. The E–L method treats the particle phase as a discrete phase and tracks particle contact and collision.…”

Section: Introductionmentioning

confidence: 99%

Scaling of catalytic cracking fluidized bed downer reactor based on CFD simulations—Part II: effect of reactor scale

et al. 2022

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Progress in CFD Simulations of Fluidized Beds for Chemical and Energy Process Engineering

Cited by 121 publications

References 1,233 publications

CFD Modelling of the Fuel Reactor of a Chemical Loping Combustion Plant to Be Used with Biomethane

CFD Modelling of the Fuel Reactor of a Chemical Loping Combustion Plant to Be Used with Biomethane

CFD Simulation of Turbulent non-Newtonian Slurry Flows in Horizontal Pipelines

Scaling of catalytic cracking fluidized bed downer reactor based on CFD simulations—Part II: effect of reactor scale

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