Comparative investigation on catalytic ozonation of VOCs in different types over supported MnO catalysts

Chen, Guanyi; Wang, Zhi; Lin, Fawei; Zhang, Zhiman; Yu, Hongdi; Yan, Beibei; Wang, Zhihua

doi:10.1016/j.jhazmat.2020.122218

Cited by 118 publications

(53 citation statements)

References 75 publications

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“…Figure 2 shows XRD patterns of the parent alumina and the catalyst. The characteristic reflections of γ-Al 2 O 3 (2θ = 37 • , 46 • and 67 • ) are detected in both spectra, which is in a good agreement with the published literature [23,29] [22,29]. The average particle sizes calculated from the diffraction peaks at 37.3 • (MnO 2 ) and 32.7 • (Mn 2 O 3 ) using the Debye-Scherrer equation are 19.0 nm and 9.0 nm, respectively.…”

Section: Catalyst Characterizationsupporting

confidence: 88%

“…Since the enhancement of the oxidation efficiency in the presence of O3 is attributable to a formation of highly reactive O atoms [29,32,33], catalytic O3 decomposition (over Mn/Al2O3 or Al2O3) as well as gas-phase decomposition (in the empty reactor) was also studied in detail. The results obtained are shown in Figure 5.…”

Section: O3 Decompositionmentioning

confidence: 99%

“…Since the enhancement of the oxidation efficiency in the presence of O 3 is attributable to a formation of highly reactive O atoms [29,32,33]…”

Section: O 3 Decompositionmentioning

confidence: 99%

“…It was revealed that the activity of the catalysts decreases in the following order: Mn/13X > Ce/13X > Cu/13X > Ag/13X > Co/13X. Chen et al studied the ozonation of chlorobenzene over manganese supported on different carriers (Al 2 O 3 , TiO 2 , SiO 2 , CeO 2 , and ZrO 2 ) to reveal the effect of carrier on the catalytic performance of MnO x in OZCO [29]. The authors found that Mn/Al 2 O 3 exhibited the highest efficiency in chlorbenzene abatement.…”

Section: Introductionmentioning

confidence: 99%

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Removal of VOCs by Ozone: n-Alkane Oxidation under Mild Conditions

et al. 2021

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Volatile organic compounds (VOCs) have a negative effect on both humans and the environment; therefore, it is crucial to minimize their emission. The conventional solution is the catalytic oxidation of VOCs by air; however, in some cases this method requires relatively high temperatures. Thus, the oxidation of short-chain alkanes, which demonstrate the lowest reactivity among VOCs, starts at 250–350 °C. This research deals with the ozone catalytic oxidation (OZCO) of alkanes at temperatures as low as 25–200 °C using an alumina-supported manganese oxide catalyst. Our data demonstrate that oxidation can be significantly accelerated in the presence of a small amount of O3. In particular, it was found that n-C4H10 can be readily oxidized by an air/O3 mixture over the Mn/Al2O3 catalyst at temperatures as low as 25 °C. According to the characterization data (SEM-EDX, XRD, H2-TPR, and XPS) the superior catalytic performance of the Mn/Al2O3 catalyst in OZCO stems from a high concentration of Mn2O3 species and oxygen vacancies.

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Section: Catalyst Characterizationsupporting

confidence: 88%

Section: O3 Decompositionmentioning

confidence: 99%

“…Since the enhancement of the oxidation efficiency in the presence of O 3 is attributable to a formation of highly reactive O atoms [29,32,33]…”

Section: O 3 Decompositionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Removal of VOCs by Ozone: n-Alkane Oxidation under Mild Conditions

et al. 2021

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“…[3,4] Therefore, the treatment of these hazardous pollutants will be of vital practical significance to environmental protection. [5] Up to now, diverse methods have been adopted for the removal of toxic pollutants from wastewaters such as adsorption, [6] ozonation, [7] bioremediation, [8] electrochemical degradation [9] and photocatalytic degradation etc. [10][11][12] Compared with these techniques, catalytic reduction with NaBH 4 as reducing agent in aqueous medium has been found to be superior to other methods due to its low cost, environmentally friendly, and ease operation.…”

Section: Introductionmentioning

confidence: 99%

A new La‐Doped CuBi₂O₄ Catalysts for the Reduction of Nitroaromatic Compounds and Toxic Organic Dyes

Yang

Quan

et al. 2020

ChemistrySelect

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The new La‐doped CuBi2O4 catalysts were prepared by one‐pot hydrothermal method. The prepared catalysts were investigated by high‐resolution transmission electron microscopy (HRTEM), powder X‐ray diffraction (XRD), X‐ray photoelectron spectroscopy (XPS), Hydrogen temperature‐programmed desorption (H2‐TPD), and Electrochemical impedance spectroscopy (EIS). The synthetic catalysts have been investigated for the reduction of 4‐nitrophenol and toxic organic dyes. La‐doping improve the surface electron transport and H2‐adsorption ability. The La−CuBi2O4(C) catalyst has higher electron transfer efficiency and stronger H absorption ability. It was proposed that the doped La3+ and surface hydrogen species play key roles in reduction reaction. The electron transfer can be achieved by La3+ capture electron to be reduced La2+, then La2+ return to original state. Meanwhile, the improvement of H absorption ability due to La‐doping is also benefit to reduce the 4‐NP. This study is helpful in acquiring an in‐depth insight into the catalytic role of doping.

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Rod‐Like MnO_x Catalyst Derived from Mn‐MOF‐74 for Chlorobenzene Oxidation at Low Temperature

et al. 2022

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In this study, a series of MnO x catalysts were prepared by pyrolysis of Mn-MOF-74 precursors. The calcination temperature had influence on the structure and catalytic performance of MnO x catalysts in the catalytic oxidation of chlorobenzene. Their physicochemical properties were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), N 2 adsorption/desorption, X-ray photoelectron spectroscopy (XPS), H 2 temperature programmed reduction (H 2 -TPR) and Fourier transform infrared (FTIR), respectively. The order of catalytic activity was as follows: rod-like MnO x -700 > rod-like MnO x -600 > boat-like MnO x -800. The MnO x -700 catalysts exhibited excellent activity for chlorobenzene (CB) decomposition, and the T 90 (temperature with CB conversion of 90 %) was 225 °C. The main reason was that MnO x -700 inherited the advantage of Mn-MOF-74 with high specific surface area, and had higher ratio of Mn 3 + / Mn 4 + (2.51) and O sur /O total (0.53). Meanwhile, the MnO x -700 can maintain over 90 % CB conversion at elevated temperature for 100 h. This work can provide an idea for the further development of high efficiency catalysts prepared via MOF-template in the CB decomposition.

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Comparative investigation on catalytic ozonation of VOCs in different types over supported MnO catalysts

Cited by 118 publications

References 75 publications

Removal of VOCs by Ozone: n-Alkane Oxidation under Mild Conditions

Removal of VOCs by Ozone: n-Alkane Oxidation under Mild Conditions

A new La‐Doped CuBi₂O₄ Catalysts for the Reduction of Nitroaromatic Compounds and Toxic Organic Dyes

Rod‐Like MnO_x Catalyst Derived from Mn‐MOF‐74 for Chlorobenzene Oxidation at Low Temperature

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Comparative investigation on catalytic ozonation of VOCs in different types over supported MnO catalysts

Cited by 118 publications

References 75 publications

Removal of VOCs by Ozone: n-Alkane Oxidation under Mild Conditions

Removal of VOCs by Ozone: n-Alkane Oxidation under Mild Conditions

A new La‐Doped CuBi2O4 Catalysts for the Reduction of Nitroaromatic Compounds and Toxic Organic Dyes

Rod‐Like MnOx Catalyst Derived from Mn‐MOF‐74 for Chlorobenzene Oxidation at Low Temperature

Contact Info

Product

Resources

About

A new La‐Doped CuBi₂O₄ Catalysts for the Reduction of Nitroaromatic Compounds and Toxic Organic Dyes

Rod‐Like MnO_x Catalyst Derived from Mn‐MOF‐74 for Chlorobenzene Oxidation at Low Temperature