RT Journal Article T1 Exploring the pressurized heterogeneous electro-Fenton process and modelling the system A1 Poza Nogueiras, Verónica A1 Moratalla, Ángela A1 Pazos Currás, Marta María A1 Sanromán Braga, María Ángeles A1 Sáez, Cristina A1 Rodrigo, Manuel A. K1 3303.09 Operaciones Electroquímicas K1 3308.06 Regeneración del Agua K1 3308.10 Tecnología de Aguas Residuales AB In this research, a bench-scale installation was tested for the heterogeneous electro-Fenton treatment of clofibric acid. The setup consists of a pressurized flow-through electrochemical cell equipped with a catalyst fluidized-bed and aerated with a jet mixer. The novelty of the research is two-fold: the use of the pressurized-jet aerator on an electro-Fenton treatment is tested and it is one of the first studies combining pressure with heterogeneous catalysis in electro-Fenton. Moderate relative pressures, up to 2 bar, were analyzed. Initially, the electrogeneration of hydrogen peroxide was tested, showing that it is remarkably boosted by the application of pressure. Then, the elimination of clofibric acid by means of an electro-Fenton treatment was carried out at 0.12 and 0.25 A, using iron-containing alginate beads as the catalyst. Regardless of the current intensity, the increase from atmospheric pressure to 1 gauge bar boosted the elimination of the pollutant and reduced the specific energy consumption of the electrochemical cell. Specifically, at 0.25 A an abatement higher than 98% was achieved in 8 h at atmospheric pressure while only 1 h was required at 1 bar of gauge pressure. However, a further increase of the pressure to 2 bar did not report a major improvement. Moreover, the effect of pressure on the catalyst was analyzed, concluding that the integrity of the alginate beads was not compromised by pressure. In fact, the iron leaching was very similar at 0, 1 and 2 bar: around 30% after 8 h of treatment. Finally, a mathematical model was developed, using the experimental data to obtain the necessary fitting parameters, which allowed to understand better the behavior of the bench-scale reaction system. PB Chemical Engineering Journal SN 13858947 YR 2022 FD 2022-03-01 LK http://hdl.handle.net/11093/5055 UL http://hdl.handle.net/11093/5055 LA eng NO Chemical Engineering Journal, 431, 133280 (2022) NO Ministerio de Ciencia, Innovación y Universidades | Ref. CTQ2017-90659-REDT DS Investigo RD 13-dic-2024