Simulation of a reacting gas–liquid bubbly flow with CFD and PBM: Validation with experiments

Buffo, Antonio; Vanni, Marco; Marchisio, Daniele

doi:10.1016/j.apm.2016.11.010

Cited by 28 publications

(7 citation statements)

References 62 publications

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“…As mentioned in Sect. , EL simulations can provide a high level of detail but also EE became popular due to a lower computational time and an improved description of the BSD due to population balance modeling and, therefore, to account also for a high gas holdup , . In both approaches additional species transport equations have to be introduced.…”

Section: Two‐phase Systemsmentioning

confidence: 99%

Models for the Numerical Simulation of Bubble Columns: A Review

Mühlbauer

Hlawitschka

Bart

2019

Chemie Ingenieur Technik

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This work reviews the state‐of‐the‐art models for the simulation of bubble columns and focuses on methods coupled with computational fluid dynamics (CFD) where the potential and deficits of the models are evaluated. Particular attention is paid to different approaches in multiphase fluid dynamics including the population balance to determine bubble size distributions and the modeling of turbulence where the authors refer to numerous published examples. Additional models for reactive systems are presented as well as a special chapter regarding the extension of the models for the simulation of bubble columns with a present solid particle phase, i.e., slurry bubble columns.

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Section: Two‐phase Systemsmentioning

confidence: 99%

Models for the Numerical Simulation of Bubble Columns: A Review

Mühlbauer

Hlawitschka

Bart

2019

Chemie Ingenieur Technik

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“…Although the PBM bubble diameter models are widely applied on the stirred reactor and bubble column (Wang and Wang 2007;Akbari, et al 2015;Buffo, et al 2017;Guo, et al 2017), the various problems were still unresolved. Hence, in this manuscript, simple models were suggested.…”

Section: Bubble Diametermentioning

confidence: 99%

Simulation and Experimental Investigation of Power Consumption, Gas Dispersion and Mass Transfer Coefficient in a Multi-Phase Stirred Bioreactor

Chen

2019

Braz. J. Chem. Eng.

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Bio-oxidation leaching of refractory gold concentrate was carried out in a typical gas-liquid-solid three-phase stirred bioreactor. The bacteria, which adhered to solid particle surfaces and spread over the liquid phase, require sufficient oxygen and nutrient of carbon and nitrogen, and then the mass transfer rate should be considered. However, the mass transfer coefficient, which could be used to evaluate the mass transfer rate, was determined by gas holdup, bubble diameter and power consumption. Therefore, a three-phase Eulerian equation with k-ε turbulence model and additional models of two bubble diameter, a torque and a mass transfer coefficient were applied in the simulation. The simulation results were validated with experimental data and used to analyze the spatial distribution of the mass transfer coefficient. The results demonstrated that the simulation and experimental data of Sauter mean bubble diameter and power number were in good agreement and the simulation results of the mass transfer coefficient were agree with the values calculated by an empirical correlation. The Davoody model can be strongly recommended for further simulation of the bubble diameter, and the gas holdup and mass transfer coefficient were very unevenly distributed in the lower zone. Hence, the lower impeller clearance should be considered.

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“…No correction for dissolved ions was made, as a correction by Wiesenberger and Schumpe (see e.g. [28]) gave little effect.…”

Section: Table 4 Calculated Mass Transfer Diffusion Coefficients For Ternary System Co 2 H 2 O Nh 3 In Liquid (Aqueous) Phase and Gas Pmentioning

confidence: 99%

Carbon dioxide dissolution and ammonia losses in bubble columns for precipitated calcium carbonate (PCC) production

Zevenhoven

Legendre

Said

et al. 2019

Energy

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The slag2PCC concept aims at transforming steelmaking slag into precipitated calcium carbonate (PCC) with market value. This paper reports on R&D work on two features that impact the overall performance and costs of slag2PCC as a carbon capture and utilisation (CCU) technology. Operating near ambient conditions, calcium is selectively leached from steelmaking slag using aqueous ammonium salt solvent, followed by carbonation using a CO 2containing stream. Separators for removing spent slag and PCC connect two reactors for extraction and carbonation, respectively, between which the solvent solution is cycling. One requirement is effective conversion of the CO 2 fed to the system: while the dissolution of CO 2 is the rate-liming step it is essential minimise release of unreacted CO 2 . Mixing the solutions enhances mass transfer. High-speed video recordings were made around mixers located at various heights in a bubble column, analysing CO 2 bubble swarm dissolution. A second feature studied are losses of ammonia (NH 3 ) from the solution. An outlet for unreacted gas presents a risk of NH 3 vapour release, which lowers solution alkalinity while adding costs.Multicomponent mixture mass transfer analysis showed that diffusion of NH 3 into CO 2 bubbles may be significant at least during initial stages of dissolution. Experimental findings were verified.

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Simulation of a reacting gas–liquid bubbly flow with CFD and PBM: Validation with experiments

Cited by 28 publications

References 62 publications

Models for the Numerical Simulation of Bubble Columns: A Review

Models for the Numerical Simulation of Bubble Columns: A Review

Simulation and Experimental Investigation of Power Consumption, Gas Dispersion and Mass Transfer Coefficient in a Multi-Phase Stirred Bioreactor

Carbon dioxide dissolution and ammonia losses in bubble columns for precipitated calcium carbonate (PCC) production

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