Abstract：CoMn/SBA-15 composite catalysts were prepared by hydrothermal-impregnation method, and their catalytic performance in catalytic oxidation of toluene was evaluated. Furthermore, the synergistic effect between Co, Mn active components and the support SBA-15 was also investigated by XRD, TEM, N2 adsorption-desorption, FTIR, XPS and H2-TPR. The results showed that when the mole ration of Mn: Co was 4:1, Co1Mn4/SBA-15 catalyst exhibited the best low-temperature catalytic activity, and its T50 and T90 were both 40℃ lower than those of Mn/SBA-15 and Co/SBA-15. The excellent catalytic performance was attributed to the higher content of Co3+, Mn3+, surface adsorbed oxygen and the consequently boosting redox ability. The synergistic effect between Co and Mn led to the formation of Co-O-Mn sosoloid and Si-O-Mn structure, and thus more lattice defects were produced. Moreover, the prepared catalysts presented the high CO2 selectivity, good reaction stability and carbon deposition resistance.
隋美君, 柳志刚, 杨晨, 王栋, 兰铭鑫, 孙红. 新型CoMn/SBA-15低温催化氧化甲苯性能[J]. 中国环境科学, 2023, 43(7): 3396-3403.
SUI Mei-jun, LIU Zhi-gang, YANG Chen, WANG Dong, LAN Ming-xin, SUN Hong. Novel CoMn/SBA-15 catalyst for highly efficient low-temperature catalytic oxidation of toluene. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(7): 3396-3403.
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