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Peter, Ronny ; Fischerauer, Gerhard:
In-situ measurement of permittivity distributions in reactors by cavity perturbation.
In: Measurement Science and Technology.
Bd. 31
(2020)
Heft 9
.
- 094019.
ISSN 0957-0233
DOI: https://doi.org/10.1088/1361-6501/ab6add
Abstract
The microwave cavity perturbation method is widely used for material parameter measurements in connection with small homogeneous samples. Its applicability to larger and inhomogeneous samples is uncertain, but highly desirable in connection with the in-situ condition monitoring of chemical reactors. We have investigated the problem of the reconstruction of axially inhomogeneous permittivity distributions in tubular reactors from measured cavity resonance frequencies of the reactor. It is shown that the use of a-priori knowledge about the function class of the permittivity distribution, which in turn follows from assumptions about the chemical process inside the reactor, allows one to reconstruct the permittivity distribution based on a few resonances only. The resulting errors in the function parameters or in the permittivity values identified are on the order of 5 %, as demonstrated by analytical and numerical calculations, by numerical experiments, and by laboratory experiments.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Keywords: | Microwave cavity resonator; chemical reactor; resonant frequency; material parameter distribution; permittivity; in-situ monitoring; chemical process |
| Institutionen der Universität: | Fakultäten > Fakultät für Ingenieurwissenschaften Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Mess- und Regeltechnik Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Mess- und Regeltechnik > Lehrstuhl Mess- und Regeltechnik - Univ.-Prof. Dr.-Ing. Gerhard Fischerauer Fakultäten |
| Titel an der UBT entstanden: | Ja |
| Themengebiete aus DDC: | 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften |
| Eingestellt am: | 06 Jul 2020 07:45 |
| Letzte Änderung: | 05 Okt 2023 07:43 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/54429 |