Comprehensive multiphysics modeling of photocatalytic processes by computational fluid dynamics based on intrinsic kinetic parameters determined in a differential photoreactor

Casado, Cintia; Marugán, Javier; Timmers, R.A.; Muñoz, M.; Grieken, Rafael van

doi:10.1016/j.cej.2016.07.081

Cited by 90 publications

(48 citation statements)

References 36 publications

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“…Since the selected phase function was the Henyey-Greenstein, it is needed to develop a UDF to have this function resolved. Next, a proposed UDF to resolve this function in pretty basic terms is shown [9]. Additional comments have been added to explain further the purpose of the programmed line.…”

Section: Udf Used To Resolve the Henyey-greenstein Phase Functionmentioning

confidence: 99%

Radiative Transference Equation Algorithm as an ANSYS® User-Defined Function for Solar Technology Applications

Barraza-Jiménez¹,

Ruiz-Soto²,

Torres-Herrera³

et al. 2019

Concepts of Semiconductor Photocatalysis

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Heat effects in photocatalytic reactor applications are discussed and a case study is analyzed where sunlight is used to activate a chemical reaction to degrade water pollutants. Heat is produced in the light-capturing process, and heat effects need to be better understood during the device design process. Radiative transfer equation (RTE) is the guiding equation used to calculate radiation proliferation in participating media, and it is used to describe the balance of radiative energy transport in the participating media including the interactions caused by different processes such as absorption, scattering, and emission, which also are subject to additional phenomena like weakening and magnification. This equation plays an important role in the design process since it may be included in the simulation process to represent the sunlight heat effects in the different photocatalytic reactor components. In this chapter, it is explained how to build a simplified algorithm to incorporate the RTE in a numerical calculation during the design of a photocatalytic reactor using the commercial software ANSYS®. In addition, simplifications are explained that enable the program to coordinate some coefficients such as absorption and dispersion so their effects are included within the numerical calculation. A user-defined function is presented in the end of the chapter as a usable algorithm in ANSYS® program with acceptable results for photocatalytic reactors.

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Section: Udf Used To Resolve the Henyey-greenstein Phase Functionmentioning

confidence: 99%

Radiative Transference Equation Algorithm as an ANSYS® User-Defined Function for Solar Technology Applications

Barraza-Jiménez¹,

Ruiz-Soto²,

Torres-Herrera³

et al. 2019

Concepts of Semiconductor Photocatalysis

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“…Normalized concentrations were calculated between the baseline at t = 0 s and the final absorbance. More information about the experimental setup can be found elsewhere .…”

Section: Computational Modelingmentioning

confidence: 99%

Comparative Evaluation of OpenFOAM® and ANSYS® Fluent for the Modeling of Annular Reactors

et al. 2018

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A three-dimensional numerical model was solved for a turbulent incompressible steady flow and the discrepancies and similarities between the software Open-FOAM and ANSYS Fluent on the flow modeling were analyzed. The evaluation was performed for the meshing, setup, and simulation step of the modeling process. Outcomes were contrasted with experimental data to validate the fluid flow obtained with both softwares. With this aim, an experimental pulse-response technique was applied to obtain the residence time distribution (RTD) curve to be compared with the RTD curves achieved from the modeling. Additionally, images of the tracer transport in the experimental reactor were taken, showing good agreement with the computational fluid dynamics (CFD) predictions.

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“…Current photocatalytic processes in aqueous solutions involve different types of reactors [13][14][15][16][17][18][19][20][21][22], which can be classified in different groups according to their geometry (e.g., tubular or cylindrical, rectangular or square reactors, etc. ), liquid agitation techniques (e.g., continuous flow reactors, e.g., stirrer rotation) and lighting source including mainly low or medium pressure ultraviolet lamps [23][24][25][26][27], currently being replaced by LED lighting [28][29][30][31][32][33][34], which can reduce the size of the reactors, allowing the making of compact photo reactors known as mini reactors or micro reactors [35][36][37].…”

Section: Introductionmentioning

confidence: 99%

In situ Decolorization Monitoring of Textile Dyes for an Optimized UV-LED/TiO2 Reactor

2019

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Heterogeneous photocatalysis, using photocatalysts in suspension to eliminate diverse contaminants, including textile wastewater, has several advantages. Nevertheless, current absorbance and decolorization measurements imply sample acquisition by extraction at a fixed rate with consequent photocatalyst removal. This study presents online monitoring for the decolorization of six azo dyes, Orange PX-2R (OP2), Remazol Black B133 (RB), Procion Crimson H-EXL (PC), Procion Navy H-EXL (PN), Procion Blue H-EXL (PB), and Procion Yellow H-EXL (PY), analyzing the spectrum measured in situ by using the light scattering provided by the photocatalyst in suspension. The results obtained have corroborated the feasibility of obtaining absorbance and decolorization measurements, avoiding disturbances in the process due to a decrease in the volume in the reactor.

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Comprehensive multiphysics modeling of photocatalytic processes by computational fluid dynamics based on intrinsic kinetic parameters determined in a differential photoreactor

Cited by 90 publications

References 36 publications

Radiative Transference Equation Algorithm as an ANSYS® User-Defined Function for Solar Technology Applications

Radiative Transference Equation Algorithm as an ANSYS® User-Defined Function for Solar Technology Applications

Comparative Evaluation of OpenFOAM® and ANSYS® Fluent for the Modeling of Annular Reactors

In situ Decolorization Monitoring of Textile Dyes for an Optimized UV-LED/TiO2 Reactor

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