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Reactive PLIF Method for Characterisation of Micromixing in Continuous High-Throughput Chemical Reactors. Processes (Basel) 2022. [DOI: 10.3390/pr10101916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
This work aimed to test and optimise reactive Planar Laser-Induced Fluorescence (PLIF) methods for the visualisation of the micromixing regions in chemical reactors using standard PLIF and Particle Image Velocimetry (PIV) equipment with the laser source 512 nm. Two methods were tested: (i) an acid–base reaction with fluorescein as the reaction-sensitive tracer and (ii) Fenton’s reaction, with Rhodamine B as the reaction tracer. Both test-reactions were studied in stopped-flow equipment to define suitable operational conditions, namely the chemical composition of the inflow streams, the concentration of reagents and fluorophore, and suitable excitation light wavelength. The visualisation of the micromixing regions was tested in a continuous flow reactor with a T-jet geometry. A laser light sheet emitted from an Nd:YAG laser illuminated the axial section of the demonstration reactor. The mixing dynamics and the reaction course were visualised with the acid–base reactive PLIF images. Fenton’s reactive PLIF method showed the overall distribution of mixing and reaction regions. The main contribution of this work is benchmarking two methods with costs that enable the visualisation of micromixing regions in continuous high-throughput reactors.
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The extension characteristics and mixing effect of the secondary impact surface in double-layer impinging stream mixer. BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING 2022. [DOI: 10.1007/s43153-022-00233-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Brito M, Barbosa I, Fonte C, Dias M, Lopes J, Santos R. Effective Mixing of Dissimilar Fluids in Asymmetric Confined Impinging Jets Mixers. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.117756] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Qiu P, Wang F, Guo Q, Richter A, Xu J, Dai Z. Reduced-order modeling of turbulent flow reactors by tracing the Damköhler numbers. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2021.117112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Brito MSCA, Matos J, Torres MVL, Fonte CP, Dias MM, Lopes JCB, Santos RJ. Rheokinematics for Product Development – Formulation Screening in Rotational Rheometers. AIChE J 2022. [DOI: 10.1002/aic.17597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Margarida S. C. A. Brito
- Laboratory of Separation and Reaction Engineering – Laboratory of Catalysis and Materials (LSRE‐LCM), Universidade do Porto, Faculdade de Engenharia Porto Portugal
| | - Joana Matos
- Laboratory of Separation and Reaction Engineering – Laboratory of Catalysis and Materials (LSRE‐LCM), Universidade do Porto, Faculdade de Engenharia Porto Portugal
| | - Marina V. L. Torres
- Laboratory of Separation and Reaction Engineering – Laboratory of Catalysis and Materials (LSRE‐LCM), Universidade do Porto, Faculdade de Engenharia Porto Portugal
| | - Claudio P. Fonte
- Department of Chemical Engineering & Analytical Science The University of Manchester Manchester UK
| | - Madalena M. Dias
- Laboratory of Separation and Reaction Engineering – Laboratory of Catalysis and Materials (LSRE‐LCM), Universidade do Porto, Faculdade de Engenharia Porto Portugal
| | - José Carlos B. Lopes
- Laboratory of Separation and Reaction Engineering – Laboratory of Catalysis and Materials (LSRE‐LCM), Universidade do Porto, Faculdade de Engenharia Porto Portugal
- CoLAB NET4CO2 UPTEC Asprela II, Rua Júlio de Matos Porto Portugal
| | - Ricardo J. Santos
- Laboratory of Separation and Reaction Engineering – Laboratory of Catalysis and Materials (LSRE‐LCM), Universidade do Porto, Faculdade de Engenharia Porto Portugal
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Matos J, Dias MM, Lopes JCB, Santos RJ. Diffusive lagrangian mixing simulation. Chem Eng Res Des 2020. [DOI: 10.1016/j.cherd.2020.09.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Large Eddy Simulations of Reactive Mixing in Jet Reactors of Varied Geometry and Size. Processes (Basel) 2020. [DOI: 10.3390/pr8091101] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
We applied large eddy simulation (LES) to predict the course of reactive mixing carried out in confined impinging jet reactors (CIJR). The reactive mixing process was studied in a wide range of flow rates both experimentally and numerically using computational fluid dynamics (CFD). We compared several different reactor geometries made in different sizes in terms of both reaction yields and mixing efficiency. Our LES model predictions were validated using experimental data for the tracer concentration distribution and fast parallel chemical test reactions, and compared with the k-ε model supplemented with the turbulent mixer model. We found that the mixing efficiency was not affected by the flow rate only at the highest tested Reynolds numbers. The experimental results and LES predictions were found to be in good agreement for all reactor geometries and operating conditions, while the k-ε model well predicted the trend of changes. The CFD method used, i.e., the modeling approach using closure hypothesis, was positively validated as a useful tool in reactor design. This method allowed us to distinguish the best reactors in terms of mixing efficiency (T-mixer III and V-mixer III) and could provide insights for scale-up and application in different processes.
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Barium sulfate precipitation in jet reactors: Large eddy simulations, kinetics study and design considerations. Chem Eng Res Des 2020. [DOI: 10.1016/j.cherd.2020.03.019] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Barabash VM, Abiev RS, Kulov NN. Theory and Practice of Mixing: A Review. THEORETICAL FOUNDATIONS OF CHEMICAL ENGINEERING 2018. [DOI: 10.1134/s004057951804036x] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Micromixing performance and the modeling of a confined impinging jet reactor/high speed disperser. Chem Eng Sci 2018. [DOI: 10.1016/j.ces.2018.03.032] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Zha L, Pu X, Shang M, Li G, Xu W, Lu Q, Su Y. A study on the micromixing performance in microreactors for polymer solutions. AIChE J 2018. [DOI: 10.1002/aic.16188] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Li Zha
- Dept. of Chemical Engineering, School of Chemistry and Chemical Engineering; Shanghai Jiao Tong University; Shanghai 200240 P. R. China
| | - Xin Pu
- Dept. of Chemical Engineering, School of Chemistry and Chemical Engineering; Shanghai Jiao Tong University; Shanghai 200240 P. R. China
| | - Minjing Shang
- Dept. of Chemical Engineering, School of Chemistry and Chemical Engineering; Shanghai Jiao Tong University; Shanghai 200240 P. R. China
| | - Guangxiao Li
- Dept. of Chemical Engineering, School of Chemistry and Chemical Engineering; Shanghai Jiao Tong University; Shanghai 200240 P. R. China
| | - Wenhua Xu
- Dept. of Chemical Engineering, School of Chemistry and Chemical Engineering; Shanghai Jiao Tong University; Shanghai 200240 P. R. China
| | - Qinghua Lu
- Dept. of Chemical Engineering, School of Chemistry and Chemical Engineering; Shanghai Jiao Tong University; Shanghai 200240 P. R. China
- School of Chemical Science and Engineering; Tongji University; Shanghai 200092 P. R. China
| | - Yuanhai Su
- Dept. of Chemical Engineering, School of Chemistry and Chemical Engineering; Shanghai Jiao Tong University; Shanghai 200240 P. R. China
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Wojtas K, Orciuch W, Wysocki Ł, Makowski Ł. Modeling and experimental validation of subgrid scale scalar variance at high Schmidt numbers. Chem Eng Res Des 2017. [DOI: 10.1016/j.cherd.2017.05.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Fonte CP, Sultan MA, Santos RJ, Dias MM, Lopes JCB. An elastic analog model for controlling the impingement point position in confined impinging jets. AIChE J 2016. [DOI: 10.1002/aic.15169] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Cláudio P. Fonte
- Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Faculdade de Engenharia; Universidade do Porto, Rua Dr. Roberto Frias; 4200-465 Porto Portugal
| | - M. Ashar Sultan
- Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Faculdade de Engenharia; Universidade do Porto, Rua Dr. Roberto Frias; 4200-465 Porto Portugal
| | - Ricardo J. Santos
- Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Faculdade de Engenharia; Universidade do Porto, Rua Dr. Roberto Frias; 4200-465 Porto Portugal
| | - Madalena M. Dias
- Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Faculdade de Engenharia; Universidade do Porto, Rua Dr. Roberto Frias; 4200-465 Porto Portugal
| | - José Carlos B. Lopes
- Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Faculdade de Engenharia; Universidade do Porto, Rua Dr. Roberto Frias; 4200-465 Porto Portugal
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Numerical study of active mixing over a dynamic flow field in a T-jets mixer—Induction of resonance. Chem Eng Res Des 2016. [DOI: 10.1016/j.cherd.2015.12.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Abstract
Abstract
Effects of mixing on the course of fast chemical reactions are relatively well understood, especially in homogeneous systems. This enables to design and operate chemical reactors with the goal to achieve a high yield of a desired product and use systems of complex reactions as a chemical probe (chemical test reactions) to identify progress of mixing and quality of mixture. Recently, a number of studies have focused on the application of chemical test reactions to identify energy efficiency of mixing, being a convenient way of comparing mixers and reactors in terms of their mixing efficiency. This review offers a presentation of chemical test reactions available in the literature and methods of applications of test reactions to identify the energy efficiency of mixing. Also methods to assess the extent of micromixing by measuring product distribution or segregation index, and to determine the time constant for mixing are presented for single phase homogeneous systems and two-phase liquid-liquid systems.
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Dencheva N, Sampaio AS, Oliveira FM, Pouzada AS, Brito AM, Denchev Z. Preparation and properties of polyamide-6-based thermoplastic laminate composites by a novel in-mold polymerization technique. J Appl Polym Sci 2013. [DOI: 10.1002/app.40083] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Nadya Dencheva
- i3N-Institute for Polymers and Composites; Department of Polymer Engineering; University of Minho; Guimarães 4800-058 Portugal
| | - Ana S. Sampaio
- i3N-Institute for Polymers and Composites; Department of Polymer Engineering; University of Minho; Guimarães 4800-058 Portugal
| | - Filipa M. Oliveira
- i3N-Institute for Polymers and Composites; Department of Polymer Engineering; University of Minho; Guimarães 4800-058 Portugal
| | - António S. Pouzada
- i3N-Institute for Polymers and Composites; Department of Polymer Engineering; University of Minho; Guimarães 4800-058 Portugal
| | - Antonio M. Brito
- i3N-Institute for Polymers and Composites; Department of Polymer Engineering; University of Minho; Guimarães 4800-058 Portugal
| | - Zlatan Denchev
- i3N-Institute for Polymers and Composites; Department of Polymer Engineering; University of Minho; Guimarães 4800-058 Portugal
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