Wet oxidation of dimethylformamide via designed experiments approach studied with Ru and Ir containing Ti mesh monolith catalysts

• Wet oxidation of dimethylformamide with Ru–Ir/Ti monolith catalysts.
• Design of experiments for more precise comparison of reaction rates.
• Detailed characterization of the starting oxide, metallic and used catalysts.
• No significant leaching of precious metals during 55 h reaction time.
• Both oxide and metallic sites are present on the catalyst surface during oxidation.

Catalytic wet oxidation of N,N-dimethylformamide was tested in designed experiments without and with Ru–Ir on Ti mesh monolith catalysts. The rate and selectivity of the reactions were compared with the usual DOE evaluation of the data. The commercial catalyst and its reduced version, before and after usage were characterized with PGAA, TPR, SEM with EDX, XPS techniques.The catalytic reaction rates were significantly higher than the thermal one. During ∼55 h usage the precious metal loss was insignificant.The active surface can have dual nature, containing both oxide and metallic sites independently from the starting state of the catalysts.

Figure optionsDownload as PowerPoint slide