Abstract
In this work, the degradation of terephthalic acid (TA) by vanadium oxide (VxOy) supported on zinc oxide (ZnO) was evaluated in a photocatalytic ozonation treatment based on two UV-A LEDs distributions. TEM analysis and specific surface area measurement suggest that VxOy is not supported on ZnO, while the EDXRF and XPS analysis indicated the presence of VxOy. The XPS analysis on VxOy/ZnO catalyst showed non-significant surface change between fresh and used catalyst. However, ozone decomposition showed a higher reaction rate constant for catalytic (230%) and photocatalytic ozonation (310%) in comparison with single ozone treatment. Photocatalytic ozonation with central and external irradiation arrays was evaluated in TA elimination by a kinetic study. The irradiation arrays had not statistical differences in the TA decomposition or oxalic acid formation. These results suggest that the construction of central bodies inside the reactor could be not necessary for photocatalytic processes.
Original language | English |
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Pages (from-to) | 263-277 |
Number of pages | 15 |
Journal | Chemical Engineering Communications |
Volume | 207 |
Issue number | 2 |
DOIs | |
State | Published - 1 Feb 2020 |
Keywords
- AOPs
- central irradiation
- external irradiation
- kinetic study
- light emitted diode
- zinc oxide modification