Catalytic Oxidation of Low-Concentration Methane by Ozone-Assisted Fe/SSZ-13 Zeolite

GUI Yu,ZHOU Guangzhao,LI Peiqing,CHEN Ting,LI Ke,LIN He

Vehicle Engine ›› 2023, Vol. 0 ›› Issue (2) : 1-10.

Vehicle Engine ›› 2023, Vol. 0 ›› Issue (2) : 1-10.

Catalytic Oxidation of Low-Concentration Methane by Ozone-Assisted Fe/SSZ-13 Zeolite

  • GUI Yu1,ZHOU Guangzhao1,LI Peiqing2,CHEN Ting1,LI Ke2,LIN He1
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Abstract

At present, for the catalytic oxidation of lowconcentration methane, there exist the problems such as high ignition temperature and large consumption of precious metals. In order to explore a lowcost, clean and efficient methane removal technology, the effects of Fe loading, O3/CH4 and space velocity on catalytic oxidation of methane were investigated based on the strong oxidation of ozone and the excellent adsorption of Fe/SSZ-13 zeolite. The research results show that the methane conversion rate can reach 80.8% under the conditions of 1% Fe loading, CH4/O3=16 and 200 reaction temperature. By means of BET, XRD, NH3-TPD, H2-TPR, UV-Vis and XPS, Fe loading is proved to be able to increase the specific surface area of catalyst, promote the formation of more acidic sites and regulate the valence distribution and species of iron on the catalyst surface, which promotes catalytic ozonation of methane. According to insitu infrared test, O3 can activate active sites and hence promote methane adsorption and catalytic oxidation.

Key words

methane / catalytic oxidation / ozonation / molecular sieve

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GUI Yu,ZHOU Guangzhao,LI Peiqing,CHEN Ting,LI Ke,LIN He. Catalytic Oxidation of Low-Concentration Methane by Ozone-Assisted Fe/SSZ-13 Zeolite[J]. Vehicle Engine. 2023, 0(2): 1-10

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