Flowing Liquids in NMR: Numerical CFD Simulation and Experimental Confirmation of Magnetization Buildup
- Autores: Kespe M.1, Förster E.1, Nirschl H.1, Guthausen G.1,2
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Afiliações:
- Institute for Mechanical Process Engineering and Mechanics, Karlsruhe Institute of Technology
- Engler-Bunte Institute, Chair for Water Chemistry and Technology, Karlsruhe Institute of Technology
- Edição: Volume 49, Nº 7 (2018)
- Páginas: 687-705
- Seção: Original Paper
- URL: https://journals.rcsi.science/0937-9347/article/view/248104
- DOI: https://doi.org/10.1007/s00723-018-1016-z
- ID: 248104
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Resumo
Process and reaction monitoring by nuclear magnetic resonance (NMR) spectroscopy has attracted considerable attention in the last years not only because of the new generation of low-field NMR spectrometers, but also because of an industrial need of more effectivity and process optimization via real-time monitoring of process and reaction details by diverse analytical tools. Most often, bypass solutions are realized in liquid state monitoring, which leads to questions of residence time distribution, mixing phenomena and accuracy of concentration determination. Exploring chemical engineering knowledge of fluid dynamics and combining it with NMR knowledge of magnetization buildup allow the calculation of magnetization in NMR measurements on flowing substances. This approach reveals the essential parameters to be considered when constructing flow cells and when processing data in NMR process monitoring. 3D computational fluid dynamics combined with Bloch equations allows detailed time and spatially resolved insights into the significant mechanisms of magnetization distribution and opens up new possibilities for experiment design in flow NMR. An experimental confirmation was provided by MRI experiments.
Sobre autores
Michael Kespe
Institute for Mechanical Process Engineering and Mechanics, Karlsruhe Institute of Technology
Autor responsável pela correspondência
Email: Michael.Kespe@kit.edu
ORCID ID: 0000-0001-6657-2528
Alemanha, Straße am Forum 8, Karlsruhe, 76131
Eva Förster
Institute for Mechanical Process Engineering and Mechanics, Karlsruhe Institute of Technology
Email: Michael.Kespe@kit.edu
Alemanha, Straße am Forum 8, Karlsruhe, 76131
Hermann Nirschl
Institute for Mechanical Process Engineering and Mechanics, Karlsruhe Institute of Technology
Email: Michael.Kespe@kit.edu
Alemanha, Straße am Forum 8, Karlsruhe, 76131
Gisela Guthausen
Institute for Mechanical Process Engineering and Mechanics, Karlsruhe Institute of Technology; Engler-Bunte Institute, Chair for Water Chemistry and Technology, Karlsruhe Institute of Technology
Email: Michael.Kespe@kit.edu
Alemanha, Straße am Forum 8, Karlsruhe, 76131; Adenauerring 20b, Karlsruhe, 76131