Study on the Oxidation of Xylene with CoMn<sub>2</sub>O<sub>4</sub> as Catalyst

Abstract In this experiment, the effect of preparation conditions, including stirring temperature, drying temperature, calcination temperature and time on the catalytic performance for xylene oxidation was investigated. The experimental results indicated that calcination temperature was the most significant influencing factor on oxidation. When stirring temperature is 60 ℃, drying temperature is 60 ℃ and calcination time is 3 h, the effect of the calcination temperature (350 ℃, 450 ℃, 550 ℃on the difficulty degree of oxidation of these three xylenes and the difference of xylene oxidation with same configuration were investigated. Overall, catalyst with calcination temperature of 350 ℃ was the best, and the three isomeric xylenes had a complete oxidation difference of about 15 ℃. Among them, o-xylenes was the most difficult to be oxidized, and the temperature required for complete oxidation was 260 ℃. m-Xylene was the second difficult to be oxidized, followed by p-xylene. Meanwhile, XRD, XPS, N₂ adsorption and desorption, H₂-TPR and other characterizations were used to analyze the reason why calcination temperature caused the difference in oxidation degree among the three different configurations of xylene.

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	Articles by authors
	Yu Fuhang
	Li Yonghong
	Lu Qianwen
	Li Xiaojing

Keywords： xylene； composite metal oxide； catalytic oxidation

Received 2020-06-12;

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Yu Fuhang, Li Yonghong, Lu Qianwen, Li Xiaojing.Study on the Oxidation of Xylene with CoMn₂O₄ as Catalyst[J] Chemcial Industry and Engineering, 2021,V38(4): 25-36

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