Superior Toxicity-Resistant MnZrOx for Catalytic Complete Oxidation of Toluene

Abstract

The MnZrOx composite catalyst was prepared by using Zr-MOF as the template by hydrothermal method to introduce Mn for the catalytic oxidation of toluene. The results showed that the T₉₀ (the temperature of 90% of toluene conversion) was only 226°C at 1000 ppm and 36 000 mL g^–1 h^–1. After 72 h of continuous reaction at 260°C, toluene conversion was maintained at 98%. Even after 4 hours of exposure to a high concentration of 1,2-dichloroethane (1,2-DCE) at 2600 ppm, the activity remained above 96%. Conclusions from characterization that the high activity and stability of the MnZrOx catalysts may be attributed to lattice defects in the low crystalline state, the best reducibility, the highest Mn³⁺/Mn⁴⁺ and O_latt/O_ads ratios.