The novel method of water purification proces in the fluidized bed reactor with periodic and self regenerating film of TiO₂/FAC
Author
Migas, Przemysław
Żukowski, Witold
Bradło, Dariusz
Dulian, Piotr
Data powstania
2019
Language
English
Comments
Conference: 44ᵗʰ International Scientific and Technical Seminar "Chemistry for Agriculture"
Keywords
fluidization, FAC, water purification, photocatalyst
Abstract
The results of the photocatalytic process carried out in the new type of inclined, three-phase fluidized bed reactor with periodic film of photocatalyst 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, respectively. The cenospheres have a density lower than water, thus it could form catalytic film on top irradiated window. The formed surface film is stable, but easy to break and to reproduce in a cyclic air sparged process. The mixing was provided in the cyclically or continuously manner. From the operational point of view the best variant of mixing was 10 s air sparge/10 s break with 50% duty cycle, because it provided the same discoloration efficiency and reduced to a half energy demand with reference to continuous mixing. The proposed photocatalytic reactor due to film formation allows to substantially reduce the energy demand for the mixing with maintaining the desired degree of discoloration.
