Cu-containing MFI zeolites as catalysts for wet peroxide oxidation of formic acid as model organic contaminant

Taran, Oxana P.; Yashnik, S. A.; Ayusheev, Artemiy B.; Piskun, A. S.; Prihod’ko, Roman V.; Ismagilov, Z. R.; Гончарук, В. В.; Parmon, Valentin N.

doi:10.1016/j.apcatb.2013.04.050

Cited by 49 publications

(38 citation statements)

References 38 publications

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“…Due to the mobilization of Cu(II)/Cu(I) in water, copper has been suggested to be supported on a porous solid substrate. Cu/13X [17], Cu/ SBA-15 [18], and Cu-containing MFI [19] zeolites have been reported as catalysts for wet peroxide oxidation of different organic pollutants. But up to now, the correlation between the copper state in the structure of the catalysts and their catalytic activity was still unclear.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Fenton-like degradation of pharmaceuticals over framework copper species in copper-doped mesoporous silica microspheres

Lyu

Zhang

2015

Chemical Engineering Journal

188

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Section: Introductionmentioning

confidence: 99%

Enhanced Fenton-like degradation of pharmaceuticals over framework copper species in copper-doped mesoporous silica microspheres

Lyu

Zhang

2015

Chemical Engineering Journal

188

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“…Notice that the presence of isolated iron ions stabilized in tetrahedral positions in the zeolite lattice is necessary to attain the high activity of iron-containing catalysts, while the most active copper species are square-planar oxide nanoclusters or-Cu-O 2 -Cu-chains stabilized in the zeolite channels. Our studies on the influence of reaction parameters on the kinetics of oxidation of formic acid catalyzed by Cu-ZSM-5-30 were reported earlier [19].…”

Section: Resultsmentioning

confidence: 94%

“…The real kinetics of peroxide oxidation of model substrates (formic acid and phenol) was studied in the presence of most active copper-and iron-containing catalysts (0.5 % Cu-ZSM-5-30 and 0.65 % Fe-ZSM-5-30) chosen based on the results of earlier studies [19]. Notice that the presence of isolated iron ions stabilized in tetrahedral positions in the zeolite lattice is necessary to attain the high activity of iron-containing catalysts, while the most active copper species are square-planar oxide nanoclusters or-Cu-O 2 -Cu-chains stabilized in the zeolite channels.…”

Section: Resultsmentioning

confidence: 99%

“…The prepared catalysts were characterized by ICP, EPR, XRD, UV-Vis DR and described earlier [19]. EPR, UV-Vis DR techniques were used for studying the copper state in spent catalysts [19].…”

Section: Catalyst Preparation and Characterizationmentioning

confidence: 99%

“…Our previous work [19] was devoted to systematic investigations of catalytic activity of Cu-containing MFI zeolites to WPO of model organic compounds. Cu-ZSM-5 zeolites with atomic Si/Al ratio equal to 30 and copper content of 0.5-1.5 % were found to be most active.…”

Section: Introductionmentioning

confidence: 99%

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Cu and Fe-containing ZSM-5 zeolites as catalysts for wet peroxide oxidation of organic contaminants: reaction kinetics

et al. 2015

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The peroxide oxidation of model substrates (formic acid and phenol) was studied in the presence of copper-and iron-containing catalysts (0.5 % Cu-ZSM-5-30 and 0.65 % Fe-ZSM-5-30). The aim was to develop optimal kinetic models for describing the kinetics of peroxide oxidation. The real kinetics of phenol and formic acid oxidation in the presence of these catalysts at varied reaction parameters (concentrations and temperature) was studied. The copper-containing catalysts were more active to formic acid oxidation than the iron-containing catalyst over all the temperature range studied. The rate of destruction of pollutants decreases with a decrease in the H 2 O 2 concentration and the catalyst weight. The observed rate dependences on the initial substrate concentration appeared to be different for the substrate used. With formic acid, an increase of initial concentration leads to a slight increase in the reaction rate. In the case of phenol peroxide oxidation, the negative order with respect to the substrate concentration was observed. This may be explained by strong inhibition of the reaction rates by phenol and intermediates (hydroquinone, catechol, etc.) of its oxidation. The mathematical modeling of the kinetics was performed for various types of kinetic equations that correspond to different hypotheses on the kinetic reaction scheme. The selected & Oxana P. Taran oxanap@catalysis.ru 1 Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, 5 prosp.kinetic models based on logical kinetic schemes allowed describing the peroxide oxidation of model substrates at an appropriate accuracy.

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Degradation of MO and H₂O₂ on Cu/γ‐Al₂O₃ pellets in a fixed bed reactor: Kinetics and transport characteristics

et al. 2020

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Pelletized Cu catalysts (Cu/γ-Al 2 O 3) with different diameters (d p = 1.1-4.2 mm) were prepared and examined kinetically for methyl orange (MO) degradation using a fixed bed reactor. A Cu/γ-Al 2 O 3 catalyst (d p = 2.3 mm) exhibited high degradation activity (Conv. MO > 95%) and superior leaching resistance (Cu leaching <0.6 mg/L in 200 hr). Apparent kinetics showed that both MO degradation and H 2 O 2 decomposition were mainly controlled by internal mass transfer. A plug-flow reactor model with masstransfer coefficients was developed, and a modified empirical correlation for external mass transfer (Sh = 1.5Re' 1.10 Sc 0.42) was proposed to accurately describe the species transport from/to the catalyst pellets in the low Reynolds number regime. The model was verified against conversions of pollutants degradation and H 2 O 2 decomposition separately in a fixed bed with relative errors <5% compared with experimental data; thus, it could be used as an effective tool for further design and optimization of reactor configuration and reaction conditions for the continuous catalytic wet peroxide oxidation process.

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Cu-containing MFI zeolites as catalysts for wet peroxide oxidation of formic acid as model organic contaminant

Cited by 49 publications

References 38 publications

Enhanced Fenton-like degradation of pharmaceuticals over framework copper species in copper-doped mesoporous silica microspheres

Enhanced Fenton-like degradation of pharmaceuticals over framework copper species in copper-doped mesoporous silica microspheres

Cu and Fe-containing ZSM-5 zeolites as catalysts for wet peroxide oxidation of organic contaminants: reaction kinetics

Degradation of MO and H₂O₂ on Cu/γ‐Al₂O₃ pellets in a fixed bed reactor: Kinetics and transport characteristics

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Cu-containing MFI zeolites as catalysts for wet peroxide oxidation of formic acid as model organic contaminant

Cited by 49 publications

References 38 publications

Enhanced Fenton-like degradation of pharmaceuticals over framework copper species in copper-doped mesoporous silica microspheres

Enhanced Fenton-like degradation of pharmaceuticals over framework copper species in copper-doped mesoporous silica microspheres

Cu and Fe-containing ZSM-5 zeolites as catalysts for wet peroxide oxidation of organic contaminants: reaction kinetics

Degradation of MO and H2O2 on Cu/γ‐Al2O3 pellets in a fixed bed reactor: Kinetics and transport characteristics

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Degradation of MO and H₂O₂ on Cu/γ‐Al₂O₃ pellets in a fixed bed reactor: Kinetics and transport characteristics