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Intensification of SOLAR-DRIVEN photocatalytic processes for treatment of contaminated waters through MICRO-STRUCTURISATION of reaction spaces

Grant number: 15/21421-0
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): August 01, 2016
Effective date (End): February 28, 2019
Field of knowledge:Engineering - Chemical Engineering
Principal Investigator:Antonio Carlos Silva Costa Teixeira
Grantee:Bruno Ramos
Home Institution: Escola Politécnica (EP). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Associated scholarship(s):17/11583-8 - Mathematical modelling of intensified heterogeneous photocatalytic reactors for treating water bodies contaminated with pharmaceutical wastes, BE.EP.PD


As part of the efforts aiming at reducing the cost and boosting the efficiency of photocatalytic water treatment technologies, this proposal aims at deepening the study of microstructurisation of reaction spaces as a tool for maximising the efficiency of such processes, while lowering their cost and thus increasing their appeal for commercial applications. We propose a detailed investigation of the main parameters considered into the design of a packed bed reactor (catalytic area, size and nature of the catalyst support), and of some of the most important operation parameters (feed flowrates, initial pollutant concentration, and irradiance) in order to build supporting mathematical models useful for designing equipment and processes for photocatalytic water treatments. To achieve this goal, we identified six targets, grouped into three investigation areas: (i) of the criteria for an effective structurisation of the reaction space, where the properties of the structurisation elements (packings) will be studied regarding their effects on the equipment's ability to collect photons and to efficiently promote photocatalysis; (ii) of process parameters and their effects on the operation and the efficiency of the reactor, where the process parameters will be investigated regarding their impacts on the stability of the photocatalytic layer and on the pollutant's degradation profile; and (iii) of the model's applicability and validation, which proposes the verification of the validity of the developed mathematical models to different photocatalysts. The empirical investigation will make use of a tubular reactor packed with borosilicate glass (and PFA) microspheres of various diameters as structuring material and support for the photocatalytic bed. The spheres will be coated with titanium dioxide (TiO¬2) as photocatalytic material, and the whole system will be irradiated with an artificial solar simulator at a suitable intensity. The degradation tests will be carried out with a simulated wastewater containing traces of acetaminophen, and the main responses will be the reaction rates and the concentrations of degradation intermediates in the water phase. These responses shall then be used for the proposal and verification of phenomenological models developed throughout the work.

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
RAMOS, BRUNO; COURI, ATIEH PARISI; OOKAWARA, SHINICHI; SILVA COSTA TEIXEIRA, ANTONIO CARLOS. Micro-structured packed bed reactors for solar photocatalysis: impacts of packing size and material on light harnessing. PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES, v. 18, n. 2, p. 577-582, FEB 1 2019. Web of Science Citations: 0.

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