Nano-fibrous zirconium-doped manganese oxide octahedral molecular sieves (denoted as Zr-OMS-2) were prepared and characterized by XRD, SEM, EDXS, FTIR, NH3-TPD, and N2 adsorption-desorption techniques. The materials were used as catalysts for liquid-phase aerobic oxidation of p-chlorotoluene to p-chlorobenzaldehyde. The Zr-OMS-2 catalysts show much higher catalytic activities than OMS-2, and the Zr-OMS-2 with 6wt% Zr content shows the highest activity, giving approximately 93% p-chlorotoluene conversion and 86% p-chlorobenzaldehyde selectivity in 10h at 100°C. The promotion effect of Zr is deduced to be related with the suitable acidity and the enhancement of specific surface area. In addition, effects of reaction parameters such as catalyst amount, oxygen flow, temperature and time were studied.
Scopus Subject Areas
- Environmental Chemistry
- Chemical Engineering(all)
- Industrial and Manufacturing Engineering