ZSM-5-supported V-Cu bimetallic oxide catalyst for remarkable catalytic oxidation of toluene in coal-fired flue gas

Li, Jianhan; Xiao, Gao-Fei; Guo, Ziyang; Lin, Beilong; Hu, Yun; Fu, Mingli; Ye, Daiqi

doi:10.1016/j.cej.2021.129675

Cited by 62 publications

(16 citation statements)

References 66 publications

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“…Among them, the Cu 1 Mn 1 catalyst reached the highest activity at 250°C, and the maximum conversion temperature (T 90 ) was 229°C. The catalytic ability of the materials synthesised herein was higher than that of previously reported catalysts, such as CuÀ V,[19] CuÀ Mn[20] and CeÀ Mn [21]. Furthermore, Liotta[22] described the total oxidation of propylene employing Co 3 O 4 À CeO 2 mixed oxide at low temperature.…”

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confidence: 70%

Study on the Performance of Copper‐Manganese Composite Oxide Catalysts for Toluene

Yang

2021

ChemistrySelect

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Copper-manganese (CuMn) composite oxide catalysts were prepared for the catalytic combustion of a common volatile organic compound, namely toluene. The structural properties of the catalysts were analysed by X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) theory, X-ray photoelectron spectroscopy (XPS) and hydrogen temperature-programmed reduction (H 2 -TPR). The catalytic stability was examined after 100 h. It was found that Cu 1 Mn 1 exhibited the highest catalytic ability when the molar ratio of Cu : Mn was 1 : 1. The removal of toluene reached 90 % at a temperature below 229°C. It was speculated that the Cu 1.5 Mn 1.5 O 4 spinel structure and CuO were formed in the catalyst. The catalyst surface area was not the main factor affecting the catalytic activity. The catalysts displayed good stability and maintained high catalytic activity for a long time. Notably, fresh catalysts contained high amounts of high-valent Mn 4 + and Cu 2 + cations, which played important roles in the catalytic combustion of toluene. The cations initiated the redox process and led to the conversion of toluene to CO 2 and H 2 O. The reduced lattice oxygen supplied from air was transformed into surface oxygen on the catalyst. The catalytic combustion of toluene in the presence of CuMn composite oxide catalysts followed the Mars-van Krevelen mechanism.

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confidence: 70%

Study on the Performance of Copper‐Manganese Composite Oxide Catalysts for Toluene

Yang

2021

ChemistrySelect

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“…The B acid and L acid sites of the Cu-VWT catalyst were clearly more abundant than those of VWT, and a large number of L acid sites were conducive to the adsorption of NH 3 molecules on the surface of the catalyst. Additionally, the NH 3 -TPD trace showed the total number of acid sites on the Cu-VWT catalyst to be larger than that on VWT, and these acid sites were also conducive to the oxidation of toluene …”

Section: Resultsmentioning

confidence: 99%

“…Additionally, the NH 3 -TPD trace showed the total number of acid sites on the Cu-VWT catalyst to be larger than that on VWT, and these acid sites were also conducive to the oxidation of toluene. 42 NO-TPD (Figure S12) featured peaks at 92 °C due to physically desorbed NO, at 255 °C due to desorbed nitrite anion NO − , and at 300 °C due to desorbed NO 2 . 43 Further high-temperature peaks (582, 717 °C) corresponded to the decomposition of nitrate and nitrite species.…”

Section: Catalytic Activity Measurementsmentioning

confidence: 99%

Cu-VWT Catalysts for Synergistic Elimination of NO_x and Volatile Organic Compounds from Coal-Fired Flue Gas

Xiao

Guo

Lin

et al. 2022

Environ. Sci. Technol.

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“…FeOx was used to assist MnOx to promote adsorption and catalytic oxidation of pollutants − and give the composite magnetic property. o -Xylene was chosen as the model VOC because it is one of the most abundant aromatic VOCs present in coal-fired flue gases. − It is also because little attention has been given to o -xylene in flue gas, whereas benzene and toluene have been studied in detail. − …”

Section: Materials and Methodsmentioning

confidence: 99%

Solvent-Free Synthesis of MnOx-FeOx/Biochar for Hg⁰ and o-Xylene Removal from Flue Gas

et al. 2021

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Volatile organic compounds (VOCs) and Hg adversely affect the health of communities in coal-based economies in countries that depend on coal-fired power plants. In this study, biochar with incorporated Mn–Fe oxide composite was synthesized by co-ball milling of metal ions and biomass, followed by in situ pyrolysis carbonization and oxidation. The scanning electron microscopy (SEM) result shows that the generated metal oxides were incorporated into the biochar matrix rather than being physically deposited. By avoiding wet impregnation in the MnFe loading process, abundant functional groups were preserved on the surface of the materials. MnFe oxide homogeneity and dispersion on biochar were effectively promoted by mechanochemical synthesis for 4 h and showed high Mn and Fe oxidation states and a large amount of Lewis acid of 56.47 mol/g. Effectively promoted by these properties, the Mn–Fe oxides/biochar composite efficiently purified Hg0 and VOC by adsorption and catalytic oxidation from simulated coal-fired flue gas. The mutual inhibitory effect between Hg0 and o-xylene is pounced at high reaction temperatures when catalytic oxidation dominated. The mechanochemical strategy endowed the Mn–Fe oxides/biochar composite with strong magnetic properties, showing a saturation magnetization of 24.33 emu/g, which enabled 100% separation of the material from coal-fired fly ash.

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ZSM-5-supported V-Cu bimetallic oxide catalyst for remarkable catalytic oxidation of toluene in coal-fired flue gas

Cited by 62 publications

References 66 publications

Study on the Performance of Copper‐Manganese Composite Oxide Catalysts for Toluene

Study on the Performance of Copper‐Manganese Composite Oxide Catalysts for Toluene

Cu-VWT Catalysts for Synergistic Elimination of NO_x and Volatile Organic Compounds from Coal-Fired Flue Gas

Solvent-Free Synthesis of MnOx-FeOx/Biochar for Hg⁰ and o-Xylene Removal from Flue Gas

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ZSM-5-supported V-Cu bimetallic oxide catalyst for remarkable catalytic oxidation of toluene in coal-fired flue gas

Cited by 62 publications

References 66 publications

Study on the Performance of Copper‐Manganese Composite Oxide Catalysts for Toluene

Study on the Performance of Copper‐Manganese Composite Oxide Catalysts for Toluene

Cu-VWT Catalysts for Synergistic Elimination of NOx and Volatile Organic Compounds from Coal-Fired Flue Gas

Solvent-Free Synthesis of MnOx-FeOx/Biochar for Hg0 and o-Xylene Removal from Flue Gas

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Product

Resources

About

Cu-VWT Catalysts for Synergistic Elimination of NO_x and Volatile Organic Compounds from Coal-Fired Flue Gas

Solvent-Free Synthesis of MnOx-FeOx/Biochar for Hg⁰ and o-Xylene Removal from Flue Gas