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Catalytic wet air oxidation of bisphenol A solution in a batch-recycle trickle-bed reactor over titanate
Renata Kaplan1, Boštjan Erjavec, Marin Senila
1Laboratory for Environmental Sciences and Engineering, National Institute of Chemistry, Hajdrihova 19, 1001, Ljubljana, Slovenia.
Abstract:
Catalytic wet air oxidation (CWAO) is classified as an advanced oxidation process, which proved to be highly efficient for the removal of emerging organic pollutant bisphenol A (BPA) from water. In this study, BPA was successfully removed in a batch-recycle trickle-bed reactor over bare titanate nanotube-based catalysts at very short space time of 0.6 min gCAT g(-1). The as-prepared titanate nanotubes, which underwent heat treatment at 600 °C, showed high activity for the removal of aqueous BPA. Liquid-phase recycling (5- or 10-fold recycle) enabled complete BPA conversion already at 200 °C, together with high conversion of total organic carbon (TOC), i.e., 73 and 98 %, respectively. The catalyst was chemically stable in the given range of operating conditions for 189 h on stream.
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