Simulation of photocatalytic degradation of methylene blue in planar microreactor with integrated ZnO nanowires

In photocatalytic microreactors the catalyst layer is obtained by integration of nanostructure films of semiconductors. One of these nanostructures that have a good photocatalytic activity is ZnO nanowires. The photocatalytic degradation of methylene blue in a continuous flow microreactor with ZnO n...

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Autores principales:	Fayazeh Rabanimehr, Mehrdad Farhadian, Ali Reza Solaimany Nazar, Elham Sadat Behineh
Formato:	article
Lenguaje:	EN
Publicado:	Razi University 2021
Materias:	planar microreactor zno nanowires simulation langmuir–hinshelwood comsol multiphysics Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/107950530e6049949adb2b5524cd24b2
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id	oai:doaj.org-article:107950530e6049949adb2b5524cd24b2
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spelling	oai:doaj.org-article:107950530e6049949adb2b5524cd24b22021-11-20T12:24:01ZSimulation of photocatalytic degradation of methylene blue in planar microreactor with integrated ZnO nanowires2476-628310.22126/arww.2020.4793.1152https://doaj.org/article/107950530e6049949adb2b5524cd24b22021-06-01T00:00:00Zhttps://arww.razi.ac.ir/article_1507_571f3d1db32789c4a4ef849aed6cb9d8.pdfhttps://doaj.org/toc/2476-6283In photocatalytic microreactors the catalyst layer is obtained by integration of nanostructure films of semiconductors. One of these nanostructures that have a good photocatalytic activity is ZnO nanowires. The photocatalytic degradation of methylene blue in a continuous flow microreactor with ZnO nanowires deposited film is simulated. A finite element model is developed using COMSOL Multiphysics version 5.3 software to simulate the microreactor performance. The kinetic law of the photocatalytic reaction is assumed to be Langmuir–Hinshelwood. The kinetic constants kLHa and K are determined 1.43×10-7 mol/m2s and 7.5 m3/mol, respectively. The percent of average absolute deviation of the model in predicting the methylene blue outlet concentration obtained about 0.12% mol/m3. The model showed a very good agreement with the published experimental data. The effect of microreactor depth, methylene blue inlet concentration and flow rate on the methylene blue degradation is also investigated. The simulation results showed that the microreactor with shorter depth and lower values of inlet concentration and flow rate has higher efficiency. Thiele modulus and Damköhler number are both estimated lower than 1. It indicates that the photocatalytic reactions occur without internal and bulk mass transfer limitations.Fayazeh RabanimehrMehrdad FarhadianAli Reza Solaimany NazarElham Sadat BehinehRazi Universityarticleplanar microreactorzno nanowiressimulationlangmuir–hinshelwoodcomsol multiphysicsEnvironmental technology. Sanitary engineeringTD1-1066ENJournal of Applied Research in Water and Wastewater , Vol 8, Iss 1, Pp 36-40 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	planar microreactor zno nanowires simulation langmuir–hinshelwood comsol multiphysics Environmental technology. Sanitary engineering TD1-1066
spellingShingle	planar microreactor zno nanowires simulation langmuir–hinshelwood comsol multiphysics Environmental technology. Sanitary engineering TD1-1066 Fayazeh Rabanimehr Mehrdad Farhadian Ali Reza Solaimany Nazar Elham Sadat Behineh Simulation of photocatalytic degradation of methylene blue in planar microreactor with integrated ZnO nanowires
description	In photocatalytic microreactors the catalyst layer is obtained by integration of nanostructure films of semiconductors. One of these nanostructures that have a good photocatalytic activity is ZnO nanowires. The photocatalytic degradation of methylene blue in a continuous flow microreactor with ZnO nanowires deposited film is simulated. A finite element model is developed using COMSOL Multiphysics version 5.3 software to simulate the microreactor performance. The kinetic law of the photocatalytic reaction is assumed to be Langmuir–Hinshelwood. The kinetic constants kLHa and K are determined 1.43×10-7 mol/m2s and 7.5 m3/mol, respectively. The percent of average absolute deviation of the model in predicting the methylene blue outlet concentration obtained about 0.12% mol/m3. The model showed a very good agreement with the published experimental data. The effect of microreactor depth, methylene blue inlet concentration and flow rate on the methylene blue degradation is also investigated. The simulation results showed that the microreactor with shorter depth and lower values of inlet concentration and flow rate has higher efficiency. Thiele modulus and Damköhler number are both estimated lower than 1. It indicates that the photocatalytic reactions occur without internal and bulk mass transfer limitations.
format	article
author	Fayazeh Rabanimehr Mehrdad Farhadian Ali Reza Solaimany Nazar Elham Sadat Behineh
author_facet	Fayazeh Rabanimehr Mehrdad Farhadian Ali Reza Solaimany Nazar Elham Sadat Behineh
author_sort	Fayazeh Rabanimehr
title	Simulation of photocatalytic degradation of methylene blue in planar microreactor with integrated ZnO nanowires
title_short	Simulation of photocatalytic degradation of methylene blue in planar microreactor with integrated ZnO nanowires
title_full	Simulation of photocatalytic degradation of methylene blue in planar microreactor with integrated ZnO nanowires
title_fullStr	Simulation of photocatalytic degradation of methylene blue in planar microreactor with integrated ZnO nanowires
title_full_unstemmed	Simulation of photocatalytic degradation of methylene blue in planar microreactor with integrated ZnO nanowires
title_sort	simulation of photocatalytic degradation of methylene blue in planar microreactor with integrated zno nanowires
publisher	Razi University
publishDate	2021
url	https://doaj.org/article/107950530e6049949adb2b5524cd24b2
work_keys_str_mv	AT fayazehrabanimehr simulationofphotocatalyticdegradationofmethyleneblueinplanarmicroreactorwithintegratedznonanowires AT mehrdadfarhadian simulationofphotocatalyticdegradationofmethyleneblueinplanarmicroreactorwithintegratedznonanowires AT alirezasolaimanynazar simulationofphotocatalyticdegradationofmethyleneblueinplanarmicroreactorwithintegratedznonanowires AT elhamsadatbehineh simulationofphotocatalyticdegradationofmethyleneblueinplanarmicroreactorwithintegratedznonanowires
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Simulation of photocatalytic degradation of methylene blue in planar microreactor with integrated ZnO nanowires

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