A study of microwave-enhanced catalytic degradation of benzene using Co-Mn metal oxides combined with numerical simulation

Wang, Yijun; Chen, Wenqi; Zhong, Yu; Zhong, Nanya

doi:10.1016/j.cep.2023.109403

Cited by 5 publications

(1 citation statement)

References 47 publications

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“…Furthermore, there is a notable gap in research regarding the influence of microwave process parameters on the degradation pathways of VOCs. Recent studies have showcased the efficacy of microwave-enhanced catalysis using various catalysts, such as MnO 2 and Cu-Mn-Ce composites, in degrading VOCs like toluene, ethyl acetate, and acetone [24]. Mechanistic insights suggest that microwave irradiation induces changes in catalyst conductivity, facilitating electron transfer processes crucial for VOC oxidation [25].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Microwave Effects on the MnO2-Catalyzed Toluene Oxidation Pathway

Yang,

Ye,

Ding

et al. 2024

Processes

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Microwave radiation has become an effective catalytic combustion method, especially in the degradation of volatile organic compounds (VOCs) such as toluene using catalysts like MnO2. In this study, a spine waveguide microwave reactor was designed to investigate the influence of different microwave processing conditions on the degradation of toluene catalyzed by MnO2. An experimental system for microwave-assisted catalytic degradation of toluene was established to explore the relationship between microwave power, catalyst conductivity, and toluene degradation rate. The results showed that the efficiency of MnO2 catalyzing toluene degradation had a nonlinear relationship with microwave power, first increasing to a peak and then decreasing. Additionally, the experiment found that the degradation rate of toluene was positively correlated with the conductivity of MnO2. Subsequent characterization analyses using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM) further verified the changes in the microstructure and properties of MnO2 under microwave heating. The characterization results showed that with the increase in microwave power, the relative content of Mn3+ on the surface of MnO2 increased, and the relative content of adsorbed oxygen also increased accordingly. At a microwave power of 100 W, the treated MnO2 displayed the optimal ratio of manganese oxidation state and oxide, both close to 1:1, which was more conducive to the degradation of toluene. Based on these findings, this study hypothesized that the microwave-enhanced catalytic degradation of toluene by MnO2 may be attributed to changes in the surface electron transfer kinetics of MnO2, providing new insights into the field of microwave-enhanced catalysis.

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Section: Introductionmentioning

confidence: 99%