Phenol Degradation by Catalytic Wet Hydrogen Peroxide Oxidation on Fe/Active Carbon Catalyst

Yang, Ying; Lu, Yuan; Ye, Zhi Xiang; Li, He; Yu, Jing

doi:10.4028/www.scientific.net/amr.433-440.147

Cited by 2 publications

(2 citation statements)

References 16 publications

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“…Deep oxidation of these toxic pollutants offers an opportunity to remove them directly or transform them into non-toxic products. Recently, much research effort has been focused on heterogeneous catalytic wet peroxide oxidation (CWPO), which can be performed at mild conditions based on the action of hydroxyl radicals (HO·) (Li et al, 2014;Yang et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…A variety of catalysts containing transition metals including Fe, Ni, Cu, and Mn supported on different materials such as zeolites (Prihod'ko et al, 2011), pillared clays (Olaya et al, 2009), SBA-15 (Xiang et al, 2009), and activated carbon (Yang et al, 2012) were investigated. Among these, iron oxides are most used widely due to easy handling, low costs, and environmental friendliness (Li et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Catalytic wet peroxide oxidation of m-cresol over Fe/γ-Al2O3 and Fe–Ce/γ-Al2O3

Liu¹,

Wei²,

He³

et al. 2015

Chemical Papers

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Catalytic wet peroxide oxidation (CWPO) of m-cresol over Fe/γ-Al2O3 and Fe-Ce/γ-Al2O3 was studied. Catalysts were prepared using the incipient wetness impregnation method, and characterized using XRD, XPS, BET, and SEM techniques. Effects of Ce loading, H2O2 dose, initial solution pH, reaction temperature, and m-cresol concentration on the CWPO of m-cresol were investigated in detail. The results showed that an addition of 2 mass % Ce into Fe/γ-Al2O3 resulted in better catalytic activity over a wider pH range and at lower reaction temperatures, and with lower H2O2 consumption than when using the Fe/γ-Al2O3 catalysts only. The best catalytic activity was obtained using the Fe-Ce-2 catalyst with complete m-cresol degradation, 43.2 % TOC removal using 100 mmol L −1 H2O2 at pH 4.0 and 60 • C in 90 min. XPS showed that an addition of 2 mass % Ce increased the density of non-lattice oxygen on the catalyst surface facilitating electron transfer and thereby producing radicals and promoting catalytic activity in the CWPO reaction. Recycling experiments showed that Fe-Ce-2 retained its activity even after six subsequent runs without changing the morphology, and that iron ions did not significantly leach from the catalyst surface.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Catalytic wet peroxide oxidation of m-cresol over Fe/γ-Al2O3 and Fe–Ce/γ-Al2O3

Liu¹,

Wei²,

He³

et al. 2015

Chemical Papers

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Preparing Cu2O/Al2O3 Coating via an Electrochemical Method for the Degradation of Methyl Orange in the Process of Catalytic Wet Hydrogen Peroxide Oxidation

2022

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To improve the catalytic efficiency and decrease the reaction temperature of wet air oxidation technology, a Cu2O/Al2O3 coating was prepared on the surface of aluminium alloys by anodizing technology, and subsequent heating treatment. Then, the Cu2O/Al2O3 coating and 3 wt.% H2O2 was used to degrade methyl orange. The influence of the coating’s microstructure, crystalline component on the degradation rate of the methyl orange was studied. The microstructure of the coating was observed by scanning electron microscope. Results proved that the coating was composed of micropores, and Cu2O was evenly dispersed on the surface and pores in the Al2O3 coating. X-ray diffraction pattern analysis demonstrated Cu2O and Al2O3 characteristic peaks were found after the coating was treated at 300 °C, showing that amorphous Cu2O and Al2O3 were transformed into crystalline oxide. A UV-vis spectrophotometer was used to measure the absorbance of methyl orange, and it was found that the maximum absorption wavelength of methyl orange is 460 nm. At that wavelength, the suitable degradation condition of methyl orange was studied, and results showed that when electrochemical deposition time was 30 min and catalyst dosage was 8 g, the degradation rate of methyl orange could reach 92% at 25 °C for 120 min. Furthermore, when the catalyst was reused 9 times, the degradation rate still reached 75%. Based on the above results, a kinetic equation between the degradation rate of methyl orange and catalyst dosage was derived. The microstructure and crystalline component of the catalyst after different reuse times were characterized, and results showed that the catalytic efficiency of the Cu2O/Al2O3 coating decreased with a decrease in the coating’s specific surface area and the ratio of Cu2O in the coating.

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Phenol Degradation by Catalytic Wet Hydrogen Peroxide Oxidation on Fe/Active Carbon Catalyst

Cited by 2 publications

References 16 publications

Catalytic wet peroxide oxidation of m-cresol over Fe/γ-Al2O3 and Fe–Ce/γ-Al2O3

Catalytic wet peroxide oxidation of m-cresol over Fe/γ-Al2O3 and Fe–Ce/γ-Al2O3

Preparing Cu2O/Al2O3 Coating via an Electrochemical Method for the Degradation of Methyl Orange in the Process of Catalytic Wet Hydrogen Peroxide Oxidation

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