A convenient method to validate the gas flow of a CFD-CT simulation applied on a packed bed used in gas biofiltration through residence time distributions

Carreño-López, Felipe; Moreno-Casas, Patricio A.; Scott, Felipe; Iza, J.; Sierra-Pallares, José; Muñoz, Raúl; Vergara-Fernández, Alberto

doi:10.1016/j.cej.2022.138795

Cited by 5 publications

(3 citation statements)

References 32 publications

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“…Various authors frequently propose new models in different domains [37][38][39]. Even though powerful computational modeling methods (e.g., computational fluid dynamics-CFD) have been developed since the appearance of RTD, these still require experimental validation, usually performed using tracer experiments [40][41][42].…”

Section: Rtd Development: Defining Moments In Time Representative Wor...mentioning

confidence: 99%

Residence Time Distribution: Literature Survey, Functions, Mathematical Modeling, and Case Study—Diagnosis for a Photochemical Reactor

Nechita,

Suditu,

Puițel

et al. 2023

Processes

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This paper aims to provide an overview of the fundamentals, development, and evolution of residence time distribution (RTD) methodology and its applications to the flow and mixing of fluids (and solid particles) modeling in different systems. A concise literature analysis is followed by a succinct presentation of RTD methodology’s experimental and theoretical foundations and RTD-based mathematical modeling, highlighting its importance. An experimental demonstration of RTD diagnostics on a photochemical reactor is performed to identify the most practical locations for the inlet/outlet pipes (axial or radial) and the photochemical reactor’s ideal working posture (horizontal, vertical, or inclined) and to understand the level of mixing and to determine the fluid flow defects. Using the relevant RTD functions and the corresponding central moments, it was possible to show that short circuits and dead zones occurred in each of the six considered reactor configurations. Following these investigations, design solutions were proposed to achieve a convenient exposure time, proper mixing, and uniform irradiation inside the reactor.

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Section: Rtd Development: Defining Moments In Time Representative Wor...mentioning

confidence: 99%

Residence Time Distribution: Literature Survey, Functions, Mathematical Modeling, and Case Study—Diagnosis for a Photochemical Reactor

Nechita,

Suditu,

Puițel

et al. 2023

Processes

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show abstract

“…The residence time distribution (RTD) is an important tool for estimating the flow behavior and the mixing patterns inside the reactors. 2 Meanwhile, the residence time is a key factor related to the conversion and selectivity of the reactants. 3 Therefore, it is necessary to investigate the influence of membrane tube placement position, stirring speed, and inlet and/or outlet flow rate on RTD in SMRs.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, it is unclear whether there exist non-ideal mixing zones such as the dead zone and the plug-flow zone in SMRs. The residence time distribution (RTD) is an important tool for estimating the flow behavior and the mixing patterns inside the reactors . Meanwhile, the residence time is a key factor related to the conversion and selectivity of the reactants .…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study on the Residence Time Distribution in a Stirred Membrane Reactor

Hui

Duan

Mao

et al. 2023

Ind. Eng. Chem. Res.

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The residence time distribution (RTD) of a reactor is a key factor related to the actual reaction time of reactants, by which the mixing in a reactor can be judged indirectly. Though many efforts have been made to study RTD in stirred tank reactors (STs) or membrane modules, research on RTD in a stirred membrane reactor (SMR) is still lacking. For this purpose, we investigated the influence of operating conditions on mixing in the SMR through experiments, obtained non-ideal mixing region by mathematical model fitting, and analyzed the flow field combined with CFD simulation. The critical value of the ratio of the discharge of impeller to the flow rate is 13.13 designed to reach ideal mixing in the SMR and that of the ratio of the mean residence time to the mixing time is 10 correspondingly. In addition, the RTD is independent of membrane permeability resistance.

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A review of the recent progress in biotrickling filters: packing materials, gases, micro-organisms, and CFD

Liu,

Gao,

et al. 2023

Environ Sci Pollut Res

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A convenient method to validate the gas flow of a CFD-CT simulation applied on a packed bed used in gas biofiltration through residence time distributions

Cited by 5 publications

References 32 publications

Residence Time Distribution: Literature Survey, Functions, Mathematical Modeling, and Case Study—Diagnosis for a Photochemical Reactor

Residence Time Distribution: Literature Survey, Functions, Mathematical Modeling, and Case Study—Diagnosis for a Photochemical Reactor

Experimental and Numerical Study on the Residence Time Distribution in a Stirred Membrane Reactor

A review of the recent progress in biotrickling filters: packing materials, gases, micro-organisms, and CFD

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