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Dynamic Model for a Uniform Microwave-Assisted Continuous Flow Process of Ethyl Acetate Production

The aim of this work is to present a model of a reaction tube with cross structures in order to improve ethyl acetate production and microwave heating uniformity. A commercial finite element software, COMSOL Multiphysics 4.3a (Newton, MA, USA), is used to build the proposed model for a BJ-22 rectang...

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Autores principales: Wu, Yuanyuan, Hong, Tao, Tang, Zhengming, Zhang, Chun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7512756/
https://www.ncbi.nlm.nih.gov/pubmed/33265332
http://dx.doi.org/10.3390/e20040241
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author Wu, Yuanyuan
Hong, Tao
Tang, Zhengming
Zhang, Chun
author_facet Wu, Yuanyuan
Hong, Tao
Tang, Zhengming
Zhang, Chun
author_sort Wu, Yuanyuan
collection PubMed
description The aim of this work is to present a model of a reaction tube with cross structures in order to improve ethyl acetate production and microwave heating uniformity. A commercial finite element software, COMSOL Multiphysics 4.3a (Newton, MA, USA), is used to build the proposed model for a BJ-22 rectangular waveguide system. Maxwell’s equations, the heat conduction equation, reaction kinetics equation and Navier-Stokes equation are combined to describe the continuous flow process. The electric field intensity, the temperature, the concentration of water, the coefficient of variation (COV) and the mean temperature at different initial velocities are compared to obtain the best flow rate. Four different initial velocities are employed to discuss the effect of flow velocity on the heating uniformity and heating efficiency. The point temperatures are measured by optical fibers to verify the simulated results. The results show the electric field intensity distributions at different initial velocities have little difference, which means the initial velocity will have the decisive influence on the heating process. At lower velocity, the COV will be smaller, which means better heating uniformity. Meanwhile, the distance between each cross structure has great influence on the heating uniformity and heating efficiency, while the angle has little. The proposed model can be applied to large-scale production of microwave-assisted ethyl acetate production.
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spelling pubmed-75127562020-11-09 Dynamic Model for a Uniform Microwave-Assisted Continuous Flow Process of Ethyl Acetate Production Wu, Yuanyuan Hong, Tao Tang, Zhengming Zhang, Chun Entropy (Basel) Article The aim of this work is to present a model of a reaction tube with cross structures in order to improve ethyl acetate production and microwave heating uniformity. A commercial finite element software, COMSOL Multiphysics 4.3a (Newton, MA, USA), is used to build the proposed model for a BJ-22 rectangular waveguide system. Maxwell’s equations, the heat conduction equation, reaction kinetics equation and Navier-Stokes equation are combined to describe the continuous flow process. The electric field intensity, the temperature, the concentration of water, the coefficient of variation (COV) and the mean temperature at different initial velocities are compared to obtain the best flow rate. Four different initial velocities are employed to discuss the effect of flow velocity on the heating uniformity and heating efficiency. The point temperatures are measured by optical fibers to verify the simulated results. The results show the electric field intensity distributions at different initial velocities have little difference, which means the initial velocity will have the decisive influence on the heating process. At lower velocity, the COV will be smaller, which means better heating uniformity. Meanwhile, the distance between each cross structure has great influence on the heating uniformity and heating efficiency, while the angle has little. The proposed model can be applied to large-scale production of microwave-assisted ethyl acetate production. MDPI 2018-04-02 /pmc/articles/PMC7512756/ /pubmed/33265332 http://dx.doi.org/10.3390/e20040241 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Wu, Yuanyuan
Hong, Tao
Tang, Zhengming
Zhang, Chun
Dynamic Model for a Uniform Microwave-Assisted Continuous Flow Process of Ethyl Acetate Production
title Dynamic Model for a Uniform Microwave-Assisted Continuous Flow Process of Ethyl Acetate Production
title_full Dynamic Model for a Uniform Microwave-Assisted Continuous Flow Process of Ethyl Acetate Production
title_fullStr Dynamic Model for a Uniform Microwave-Assisted Continuous Flow Process of Ethyl Acetate Production
title_full_unstemmed Dynamic Model for a Uniform Microwave-Assisted Continuous Flow Process of Ethyl Acetate Production
title_short Dynamic Model for a Uniform Microwave-Assisted Continuous Flow Process of Ethyl Acetate Production
title_sort dynamic model for a uniform microwave-assisted continuous flow process of ethyl acetate production
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7512756/
https://www.ncbi.nlm.nih.gov/pubmed/33265332
http://dx.doi.org/10.3390/e20040241
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