新型CoMn/SBA-15低温催化氧化甲苯性能

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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.

Key words： CoMn/SBA-15 synergistic effect low-temperature catalytic oxidation toluene

Received: 13 December 2022

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X511

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	Articles by authors
	SUI Mei-jun
	LIU Zhi-gang
	YANG Chen
	WANG Dong
	LAN Ming-xin
	SUN Hong

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SUI Mei-jun,LIU Zhi-gang,YANG Chen等. Novel CoMn/SBA-15 catalyst for highly efficient low-temperature catalytic oxidation of toluene[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(7): 3396-3403.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I7/3396

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