Optimized CWPO phenol oxidation in CSTR reactor catalyzed by Al/Fe-PILC from concentrated precursors at circumneutral pH

摘要: Abstract The catalytic wet hydrogen peroxide oxidation of phenol catalyzed by an Al/Fe-PILC clay catalyst has been optimized in CSTR reactor. In order to get it more cost-effective, the process was simultaneous maximization pollutant’s degradation and mineralization, whereas minimizing H2O2 consumption under very mild conditions covariates pH (4.5–11.3), temperature (5.0–25.9 °C) input concentrations ranging 8.45–33.1 mg C/dm3 (expressed as TOC concentration); such a set resembled those typical surface waters. A central composite statistical experimental design developed, followed optimization via response methodology with dose (50.0–146.5% stoichiometric required for full oxidation) concentration (0.5–3.0 g/dm3) factors. Covariate’s analysis showed that were most influencing ones, did not result significant on any recorded responses within assessed range (4.5–11.3). Optimal multi-response performance achieved (65% 31% removal; 650 mg H2O2/dm3 output stream) stationary state residence time 135 min, room (18 ± 1.0 °C) neutral using 1.77 g/dm3 clay-catalyst tiny excess oxidizing agent (108% dose).