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Low‐Temperature Methane Abatement by Catalytic Ozonation Over Metal‐Modified SSZ‐13 Catalysts.

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Title: Low‐Temperature Methane Abatement by Catalytic Ozonation Over Metal‐Modified SSZ‐13 Catalysts.
Authors: Gui, Yu1,2 (AUTHOR), Zhu, Xudong3 (AUTHOR), Qi, Yan4 (AUTHOR), Zhou, Guangzhao5 (AUTHOR) zhouguangzhao@sjtu.edu.cn
Source: ChemCatChem. 4/14/2026, Vol. 18 Issue 7, p1-10. 10p.
Subjects: Methane, Ozone, Catalyst structure, Catalysts
Abstract: The catalytic ozonation has been extensively studied for the abatement of volatile organic compounds (VOCs). The catalytic oxidation of low‐concentration methane (CH4) suffers from the issue of low conversion efficiency at low temperatures (< 300°C), while the catalytic ozonation is expected to effectively address this issue by feature of the strong oxidizing property of ozone (O3). Therefore, the CH4 catalytic ozonation performance of five SSZ‐13 zeolites loaded with Pd, Fe, Ni, Mn, and Cu (2.5 wt.%) and the various characterizations (such as XRD, BET, XPS, and H2‐TPR) of catalysts was systematically investigated in this study. The results indicated that the Pd/SSZ‐13 catalyst exhibited the best catalytic oxidation activity with a CH4 conversion rate of over 90% at 435°C. however, the Fe/SSZ‐13 catalyst had the best low‐temperature catalytic ozonation performance, achieving a methane conversion rate of 56% at 200°C. According to the characterization results, the O3‐pretreated Fe/SSZ‐13 catalyst possessed a higher surface adsorbed oxygen concentration, a higher Fe3+/Fe2+ ratio and a lower redox temperature compared to the fresh Fe/SSZ‐13 catalyst. In‐situ Diffused Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) detected distinct the O3 and superoxide (O2−) adsorption peaks on the Fe/SSZ‐13 surface. These results suggests that O3 adsorbs and dissociates into highly active oxygen species on the Fe/SSZ‐13 catalyst surface, leading to a significant improvement in the low‐temperature CH4 ozonation reaction. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:The catalytic ozonation has been extensively studied for the abatement of volatile organic compounds (VOCs). The catalytic oxidation of low‐concentration methane (CH4) suffers from the issue of low conversion efficiency at low temperatures (< 300°C), while the catalytic ozonation is expected to effectively address this issue by feature of the strong oxidizing property of ozone (O3). Therefore, the CH4 catalytic ozonation performance of five SSZ‐13 zeolites loaded with Pd, Fe, Ni, Mn, and Cu (2.5 wt.%) and the various characterizations (such as XRD, BET, XPS, and H2‐TPR) of catalysts was systematically investigated in this study. The results indicated that the Pd/SSZ‐13 catalyst exhibited the best catalytic oxidation activity with a CH4 conversion rate of over 90% at 435°C. however, the Fe/SSZ‐13 catalyst had the best low‐temperature catalytic ozonation performance, achieving a methane conversion rate of 56% at 200°C. According to the characterization results, the O3‐pretreated Fe/SSZ‐13 catalyst possessed a higher surface adsorbed oxygen concentration, a higher Fe3+/Fe2+ ratio and a lower redox temperature compared to the fresh Fe/SSZ‐13 catalyst. In‐situ Diffused Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) detected distinct the O3 and superoxide (O2−) adsorption peaks on the Fe/SSZ‐13 surface. These results suggests that O3 adsorbs and dissociates into highly active oxygen species on the Fe/SSZ‐13 catalyst surface, leading to a significant improvement in the low‐temperature CH4 ozonation reaction. [ABSTRACT FROM AUTHOR]
ISSN:18673880
DOI:10.1002/cctc.202501879