Wet air oxidation of paracetamol over precious metal/Ti mesh monolith catalyst

The catalytic wet oxidation of paracetamol (PAR) was tested with Pt, Ru, Ir containing Ti monoliths measuring COD, TOC and TN conversion and compared with that of the non-catalytic reaction. The decrease of PAR concentration during reaction was followed by UV-vis spectrometry also. The catalysts were characterized by XPS, PGAA, TPR and SEM-EDX. The monometallic Pt and Ru/Ti catalysts were the most active, even below 150 degrees C. RuO2/Ti had the highest specific activity. After 100 h reaction time the Pt loss was 23%, while the RuO2/Ti kept its Ru content. The RuO2/TiO2 composite formation explains the highest activity and stability. (C) 2016 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.