Super Stability of Cu-Mn/Y Bimetallic Catalyst for Ozone-assisted Catalytic Oxidation of Toluene.

Xia, Ke; Huang, Jin-Hua; Ye, Li-Ping

Unsatisfactory performance and poor lifetime encountered by most catalysts severely confine their advancement in practical applications. Herein, the metallic oxide catalysts employing Y zeolite as support were prepared by the impregnation method to address these obstacles in catalytic oxidation of toluene with ozone. The results show that Cu-Mn/Y bimetallic catalyst (CM-Y) possesses relatively high toluene conversion and ozone decomposition efficiency at room temperature because of the high reduction ability and enhanced mobility of oxygen in comparison with those of the monometallic catalysts. Furthermore, the effects of the key operating parameters (O3/C7H8 volume ratio, moisture content, and reaction temperature) were investigated over the CM-Y catalyst. And the results suggest that the minimum O3/C7H8 volume ratio of 10 and reaction temperature of 100 ℃ were required to obtain high catalytic activity and steady-state ozonation of toluene. The splendid toluene conversion of ~ 97.5% and COx selectivity of ~ 98.5% could be achieved under the optimal reaction conditions after the 500 h toluene oxidation reaction. Moreover, only < 0.04 ppm ozone could be detected in the outlet gas. Aforementioned results were also reasonably verified by various characterizations including H2-temperature-programmed reduction (H2-TPR), gas chromatography-mass spectrometer (GC–MS), and Fourier transform infrared (FT-IR) spectroscopy. CM-Y catalyst reveals a promising application prospect in ozone-assisted catalytic oxidation for VOC removal at low temperatures.

TOLUENE; BIMETALLIC catalysts; CATALYTIC oxidation; ZEOLITE Y; CATALYTIC activity; METALLIC oxides; OXIDATION; OXYGEN reduction

Water, Air & Soil Pollution, 2022, Vol 233, Issue 8, p1

0049-6979

Academic Journal

10.1007/s11270-022-05781-9