Low-Temperature Catalytic Ozonation of Multitype VOCs over Zeolite-Supported Catalysts

Jiaming Shao, Yunchu Zhai, Luyang Zhang, Li Xiang and Fawei Lin ()
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Jiaming Shao: State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
Yunchu Zhai: State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
Luyang Zhang: School of Environmental Science and Engineering, Tianjin University and Tianjin Key Lab of Biomass and Wastes Utilization, Tianjin 300072, China
Li Xiang: School of Environmental Science and Engineering, Tianjin University and Tianjin Key Lab of Biomass and Wastes Utilization, Tianjin 300072, China
Fawei Lin: School of Environmental Science and Engineering, Tianjin University and Tianjin Key Lab of Biomass and Wastes Utilization, Tianjin 300072, China

IJERPH, 2022, vol. 19, issue 21, 1-16

Abstract: Volatile organic compounds (VOCs) are an important source of air pollution, harmful to human health and the environment, and important precursors of secondary organic aerosols, O 3 and photochemical smog. This study focused on the low-temperature catalytic oxidation and degradation of benzene, dichloroethane, methanethiol, methanol and methylamine by ozone. Benzene was used as a model compound, and a molecular sieve was selected as a catalyst carrier to prepare a series of supported active metal catalysts by impregnation. The effects of ozone on the catalytic oxidation of VOCs and catalysts’ activity were studied. Taking benzene as a model compound, low-temperature ozone catalytic oxidation was conducted to explore the influence of the catalyst carrier, the active metal and the precious metal Pt on the catalytic degradation of benzene. The optimal catalyst appeared to be 0.75%Pt–10%Fe/HZSM(200). The catalytic activity and formation of the by-products methylamine, methanethiol, methanol, dichloroethane and benzene over 0.75%Pt–10%Fe/HZSM(200) were investigated. The structure, oxygen vacancy, surface properties and surface acidity of the catalysts were investigated. XRD, TEM, XPS, H 2 -TPR, EPR, CO 2 -TPD, BET, C 6 H 6 -TPD and Py-IR were combined to establish the correlation between the surface properties of the catalysts and the degradation activity.

Keywords: VOCs; catalytic ozonation; HZSM; low temperature (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2022
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