Benzene oxidation with ozone over MnOx/SBA-15 catalysts
- Benzene oxidation with ozone over MnOx/SBA-15 catalysts
- Mingshi Jin; 김중환; 김지만; 전종기; 정종수; 배귀남; 박영권
- MnOx/SBA-15; Catalytic oxidation; Benzene; Ozone; Mn acetate; Mn nitrate
- Issue Date
- Catalysis today
- VOL 204, 108-113
- Catalytic oxidation of benzene with ozone has been studied using manganese oxides with two different
manganese precursors, Mn(NO3)2 and Mn(CH3COO)2, supported on SBA-15 (MnOx/SBA-15). The
catalysts were characterized by X-ray diffraction, N2 adsorption–desorption, Raman spectroscopy, and
H2-temperature programmed reduction. The manganese nitrate (MN) precursor primarily resulted in
large particles on the silica support, while the manganese acetate (MA) precursor mainly resulted in a
highly dispersed manganese oxide on the silica support. The catalytic activity was dependent upon ozone
concentration, reaction times, and the amount of Mn loading. Higher benzene conversion, O3 conversion,
and COx yield were observed for MnOx-MA/SBA-15 catalyst over MnOx-MN/SBA-15, due to the highly dispersed
manganese oxides on the supports, and the higher oxygen mobility. The 15 wt% MnOx-MA/SBA-15
catalyst shows the highest catalytic activity of all the catalysts considered in this study.
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