Synthesis and performance of TiO2/fly ash cenospheres as a catalytic film in a novel type of periodic air-sparged photocatalytic reactor
Authors:
- Witold Żukowski,
- Przemysław Migas,
- Dariusz Bradło,
- Piotr Dulian
Abstract
The results of a photocatalytic process performed in a new type of inclined, three-phase fluidised bed reactor with a periodic photocatalyst film are presented. These phases were fly ash cenospheres coated with TiO2, an aqueous solution of methylene blue and an air stream passing from the bottom of the photoreactor. The cenospheres have a density lower than water and could thus form a catalytic film on a top irradiated window. The formed surface film is stable but is easy to break and be reproduced in a cyclic air-sparged process. Mixing was performed in either a cyclic or a continuous manner. From an operational point of view, the best variant of mixing was a 10 s air-sparge/10 s break with a 50% duty cycle, because it provided the same discolouration efficiency and reduced energy demand by 50% in comparison with the continuous mixing. Due to film formation, the proposed catalytic reactor enables a substantial reduction in the energy required for mixing while maintaining the desired degree of discolouration.
- Record ID
- CUTc60a5509ef0244f7a2c944453e8e780d
- Publication categories
- ;
- Author
- Journal series
- Materials, ISSN , e-ISSN 1996-1944, Biweekly
- Issue year
- 2020
- Vol
- 13
- No
- 7
- Pages
- [1-13]
- Article number
- 1691
- Other elements of collation
- fot.; rys.; tab.; wykr.; Bibliografia (na s.) - 11-13; Bibliografia (liczba pozycji) - 28; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 13, Iss. 7, Spec. Iss.
- Substantive notes
- Special Issue: Catalysts: Preparation, Catalytic Performance and Catalytic Reaction
- Keywords in English
- catalytic film, titanium dioxide, cenospheres, photocatalytic reaction
- DOI
- DOI:10.3390/ma13071691 Opening in a new tab
- URL
- https://www.mdpi.com/1996-1944/13/7/1691/htm 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/CUTc60a5509ef0244f7a2c944453e8e780d/
- URN
urn:pkr-prod:CUTc60a5509ef0244f7a2c944453e8e780d
* 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.