Multiple steady states in the photocatalytic reactor for colored compounds degradation
Authors:
- Jakub Szyman
Abstract
The paper reports the occurrence of multiple steady-state zones in most of the constructions of fixed-bed photocatalytic reactors. Such a phenomenon has not been ever observed in a field of photocatalytic reactors. The simulation has been provided for a common case in a photocatalysis—the degradation of colored compounds. The mathematical model of the photocatalytic reactor with immobilized bed has been stated by a simple ideal mixing model (analogous to the CSTR model). The solution has been continued by the two parameters—the Damköhler number and the absorption coefficient related to the inlet stream concentration. Some branches of steady states include the limit point. The performed two-parametric continuation of the limit point showed the cusp bifurcation point. Besides the numerical simulation, the physical explanation of the observed phenomenon has been provided; the multiple steady-states occurrence is controlled by light absorption–reaction rate junction. When the reaction rate is limited by the light absorption, we can say that a light barrier occurs. The dynamical simulations show that when the process is operated in a field of multiple steady states, the overall reactor efficiency is related to the reactor set-up mode.
- Record ID
- CUT5bf20d4b325a48ef9805fa1c09357c1c
- Publication categories
- ;
- Author
- Journal series
- Molecules, ISSN , e-ISSN 1420-3049, Biweekly
- Issue year
- 2021
- Vol
- 26
- No
- 13
- Pages
- [1-12]
- Article number
- 3804
- Other elements of collation
- schem.; tab.; wykr.; Bibliografia (na s.) - 11-12; Bibliografia (liczba pozycji) - 28; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 26, Iss. 13, Spec. Iss.
- Substantive notes
- Special Issue: Applications of Advanced Oxidation Processes for Water Treatment
- Keywords in English
- multiple steady states, photocatalytic reactor, wastewater treatment, colored compounds
- DOI
- DOI:10.3390/molecules26133804 Opening in a new tab
- URL
- https://www.mdpi.com/1420-3049/26/13/3804 Opening in a new tab
- Language
- eng (en) English
- License
- Score (nominal)
- 140
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT5bf20d4b325a48ef9805fa1c09357c1c/
- URN
urn:pkr-prod:CUT5bf20d4b325a48ef9805fa1c09357c1c
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.