Photocatalysis in an external four-lamp reactor: modelling and validation—dichloroacetic acid photo-oxidation in the presence of TiO2
| Autor: | Rafael R. Solís, F. J. Rivas, M. Tierno, A. Hidalgo |
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| Rok vydání: | 2019 |
| Předmět: |
Environmental Engineering
Photon Materials science Monte Carlo method Analytical chemistry Dichloroacetic acid 010501 environmental sciences 01 natural sciences Reflectivity Model validation chemistry.chemical_compound Radiation transfer chemistry Photocatalysis Environmental Chemistry General Agricultural and Biological Sciences Absorption (electromagnetic radiation) 0105 earth and related environmental sciences |
| Zdroj: | International Journal of Environmental Science and Technology. 16:6705-6716 |
| ISSN: | 1735-2630 1735-1472 |
| DOI: | 10.1007/s13762-019-02282-x |
| Popis: | Monte Carlo (MC) approach has been used to simulate the photocatalysis process in a photoreactor surrounded by four UV-A lamps attached to a cylindrical aluminum-covered surface. The asymmetrical configuration of the experimental setup suggests the use of MC as a suitable mathematical tool to solve the radiation transfer equation (RTE). Reflectance of frontiers in the photocatalytic reactor has been optimized to minimize the differences between the experimental and the theoretical overall volumetric rate of photon absorption (OVRPA). OVRPA increases as the TiO2 concentration is raised up to values in the proximity of 0.1 g L−1; thereafter, this parameter remains constant. The theoretical results have been validated by means of the photocatalysis of dichloroacetic acid (DCA). Validation has been carried out by completing experiments at different initial DCA concentrations and TiO2 doses. MC algorithm facilitates the solution of the RTE in complex photocatalytic systems. The use of imaginary frontiers reduces computational efforts with no loss in model validation. DCA photocatalysis sustains the theoretical results obtained under different experimental conditions. |
| Databáze: | OpenAIRE |
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