Alumina Supported Fenton-Like Systems for the Catalytic Wet Peroxide Oxidation of Phenol Solutions

Luca, Carla di; Ivorra, Fernando Daniel; Massa, Paola; Fenoglio, Rosa Juana

doi:10.1021/ie300416n

Cited by 39 publications

(38 citation statements)

References 31 publications

(38 reference statements)

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“…Active phase remained almost constant through all the distance, indicating a uniform distribution of copper species [30]. This diffusion of active species to inner zones of the support is probably a consequence of the high calcination temperature [31]. According to Fig.…”

Section: Catalyst Characterizationmentioning

confidence: 78%

Kinetic modeling of a heterogeneous Fenton-type oxidative treatment of complex industrial effluent

et al. 2018

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This work proposes a kinetic model for the reactions involved in the heterogeneous copper-based Fenton-type oxidation of mixed recalcitrant compounds in a real industrial effluent from the alkaline sulfite treatment of wood. This kind of treatment is unusual in this industry due to the complexity of the effluents and the high costs involved in total mineralization of the organic matter. Nevertheless, conversion of recalcitrant to degradable compounds and catalyst recovery can make the difference. The complexity of the effluent and the great number of compounds formed as intermediates, make extremely difficult the identification and quantification of the individual reactions that occur during oxidation. To solve this drawback TOC parameter was used as a representative measurement. To verify the level of TOC degradation produced by the heterogeneous catalysis reaction, experiences of homogeneous catalysis and adsorption were accomplished. The studied temperature range was 45-80 °C. A "two-step" kinetic model was applied to TOC reduction in heterogeneous and homogeneous oxidations, admitting two sequential steps of oxidation: a first fast stage ("seconds stage") followed by a slow one ("minutes stages"). Kinetic constants were obtained for both processes and activation energies were also determined for the "minutes stage" step (33.17 kJ/mol and 15.13 kJ/mol, respectively). Homogeneous catalysis studies confirm mass transfer limitations in heterogeneous oxidations. Experiences of adsorption of organic matter on CuO/γ-Al 2 O 3 catalyst demonstrated that this phenomenon is exothermic and cannot be neglected. The activation energy of adsorption was determined as 7.32 kJ/mol. Catalysts were characterized through SEM, EDS, XRD, FTIR, and TGA. Graphical Abstract

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Section: Catalyst Characterizationmentioning

confidence: 78%

Kinetic modeling of a heterogeneous Fenton-type oxidative treatment of complex industrial effluent

et al. 2018

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“…A higher amount of Fe(II) diminish the reaction delay. It has been reported that quinone and quinone-like compounds such as hydroquinone or catechol function as reducing agents for Fe(III), promoting the Fenton reaction [70][71][72][73]. Therefore, the fast occurrence of these intermediates at 70 • C could also reduce the induction period.…”

Section: 222mentioning

confidence: 99%

Natural diatomites: Efficient green catalyst for Fenton-like oxidation of Orange II

Inchaurrondo

Font

Ramos

et al. 2016

Applied Catalysis B: Environmental

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“…[17] This unique quality of alumina encouraged the researchers to engage iron oxide supported alumina catalysts for the degradation of phenol up to 5000 ppm. [18][19][20][21][22][23][24][25][26][27][28][29][30] Notably, Bautista et al studied the performance of Fe 2 O 3 /Al 2 O 3 powdered catalyst (4%Fe) in the CWPO of phenol up to 1500 ppm. However, the leached iron content in the water increased up to 10% with an increase in the initial phenol concentration, and a decrease in the mineralization levels (42%) was observed.…”

Section: Introductionmentioning

confidence: 99%

“…[23] Similarly, Fenoglio et al experimented iron oxide supported alumina as heterogeneous Fenton catalyst for the degradation of high concentration of phenol up to 5000 ppm. [24,28] It was observed that under a constant iron loading (4 wt%) the increased alumina support favors the iron oxide dispersion which led to the high degradation of phenol due to the synergistic effect of Fe/Al interactions with improved leaching stability of the catalyst. Nevertheless, the achieved iron oxide in a highly dispersed state not only limits the iron oxide loading but also demands a high amount of alumina support.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Stability of Abundant Amorphous Iron (III) oxide Grafted AlSBA‐15 as Highly Efficient Heterogeneous Fenton Catalyst for the Destruction of Phenol

Thirumoorthy

Satishkumar

2019

ChemistrySelect

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24 wt% of iron has been successfully grafted as amorphous iron oxide over mesoporous channels of SBA‐15 and 10 wt% alumina coated SBA‐15 (AlSBA‐15) using selective extraction deposition (SED) technique. The synthesized materials have been characterized using XRD, N2 adsorption studies, SEM‐EDS, 27Al MAS NMR, XPS, H2‐TPR, and HR‐TEM techniques. 27Al MAS NMR and XPS characterization results revealed that iron has been preferentially grafted over alumina. The increased binding energy of the Fe2p electron (XPS) in the 24wt %Fe/AlSBA‐15 confirms the existence of strong donor‐acceptor interaction between grafted iron oxide and an alumina support. In TPR studies, unlike silica support, AlSBA‐15 tuned the reduction property of various grafted oxidic iron species, which is evidenced by shifting of iron reduction peak to a high temperature of 436 °C. In the destruction of 200 ppm of phenol 24wt %Fe/AlSBA‐15 catalyst demonstrated 100% phenol conversion and 86% TOC removal with 0.4 ppm (0.1%) iron leaching within 30 minutes of reaction. 24wt %Fe/SBA‐15 catalyst also exhibited similar performance however, leaching of iron was found to be up to 20 ppm (8%). The 24wt %Fe/AlSBA‐15 catalyst was recycled successfully five times without loss in the catalytic activity and stability.

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Alumina Supported Fenton-Like Systems for the Catalytic Wet Peroxide Oxidation of Phenol Solutions

Cited by 39 publications

References 31 publications

Kinetic modeling of a heterogeneous Fenton-type oxidative treatment of complex industrial effluent

Kinetic modeling of a heterogeneous Fenton-type oxidative treatment of complex industrial effluent

Natural diatomites: Efficient green catalyst for Fenton-like oxidation of Orange II

Enhanced Stability of Abundant Amorphous Iron (III) oxide Grafted AlSBA‐15 as Highly Efficient Heterogeneous Fenton Catalyst for the Destruction of Phenol

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