Toluene deep oxidation over noble metals, Copper and Vanadium Oxides

Santos, Adilson Aprigio dos; Lima, Kenison Michel Nascimento; Figueiredo, Renan Tavares; Egues, Silvia Maria; Ramos, André Luís Dantas

doi:10.1007/s10562-007-9034-8

Cited by 21 publications

(17 citation statements)

References 23 publications

(25 reference statements)

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“…Until now cubic mesoporous SBA-16 system has not been studied so extensively as a support for catalytically active metal-oxide phase, like the hexagonal SBA-15. The catalytic total oxidation is considered as the most appropriate method for the removal of volatile organic compounds (VOCs) [3,17,14,[22][23][24][25][26][27]. This process is of great importance because of the strict regulations on the environmental standards which require reduction of their emission.…”

Section: Introductionmentioning

confidence: 99%

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Impact of silica structure of copper and iron-containing SBA-15 and SBA-16 materials on toluene oxidation

Szegedi

Popova

Lázár

et al. 2013

Microporous and Mesoporous Materials

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Copper and iron modified SBA-15 and SBA-16 materials were prepared by incipient wetness impregnation technique and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), N 2 physisorption, temperature-programmed reduction (TPR-TGA), UV-Vis diffuse reflectance and Mössbauer spectroscopy. Formation of finely dispersed copper and ironoxide species was observed on both supports, whereas copper ferrite could be evidenced only on SBA-15. It was found that the structural and surface properties of the mesoporous supports determine the type of formed metal oxides, their dispersion, reducibility and the catalytic activity in total oxidation of toluene. On SBA-16 support penetration of metal salt into the bimodal channel system is hindered therefore separate copper-and iron-oxide phases are formed on the outer surface of catalysts. The catalytic activity and stability are lower due to the easier agglomeration of particles. On SBA-15 support finely dispersed metal-oxides can be found in the mesoporous channels. Their interaction is favored to form bimetallic phases enhancing the catalytic activity and stability in total oxidation of toluene.

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Section: Introductionmentioning

confidence: 99%

“…Supported metal oxides (Cu, Co, Fe, Ni, Mo, V, etc.) are an alternative to the noble metals as catalysts for complete oxidation [22,[24][25][26]. Among them, copper supported catalysts are one of the most promising ones for VOC oxidation processes [24,25].…”

Section: Introductionmentioning

confidence: 99%

Impact of silica structure of copper and iron-containing SBA-15 and SBA-16 materials on toluene oxidation

Szegedi

Popova

Lázár

et al. 2013

Microporous and Mesoporous Materials

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“…[22,[24][25][26][27]. The selection of the support is an important issue, since properties such as acid or basic character, hydrophobicity, precursor and porosity, influence on the activity of the supported active phase.…”

Section: Introductionmentioning

confidence: 99%

Coupling Noble Metals and Carbon Supports in the Development of Combustion Catalysts for the Abatement of BTX Compounds in Air Streams

et al. 2015

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Abstract:The catalytic combustion of volatile organic compounds (VOCs) is one of the most important techniques to remove these pollutants from the air stream, but it should be carried out at the lowest possible temperature, saving energy and avoiding the simultaneous formation of nitrogen oxides (NOx). Under these experimental conditions, the chemisorption of water generated from VOCs combustion may inhibit hydrophilic catalysts. Nowadays, a wide variety of carbon materials is available to be used in catalysis. The behavior of these hydrophobic materials in the development of highly active and selective combustion catalysts is analyzed in this manuscript. The support characteristics (porosity, hydrophobicity, structure, surface chemistry, etc.) and the active phase nature (noble metals: Pt, Pd) and dispersion were analyzed by several techniques and the results correlated with the dual adsorptive and/or catalytic performance of the corresponding catalysts. The coupling of highly active phases and carbon materials (activated carbons, honeycomb coated monoliths, carbon aerogels, etc.) with tuneable physicochemical properties leads to the complete abatement of benzene, toluene and xylenes (BTX) from dilute air streams, being selectively oxidized to CO2 at low temperatures.

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“…They are harmful to human health and the environment. In order to control the toxic emission, catalytic oxidation to harmless products such as H 2 O and CO 2 is one of the most promising technologies due to its definitive character and energy efficiency [1][2][3][4][5][6][7][8]. VOCs can be, in fact, oxidized over a catalyst at a temperature much lower than those of thermal oxidation.…”

Section: Introductionmentioning

confidence: 99%

“…VOCs can be, in fact, oxidized over a catalyst at a temperature much lower than those of thermal oxidation. Although noble metals such as Pt, Pd, Rh and Au supported on SiO 2 , Al 2 O 3 and zeolites [2][3][4][5][6] generally show high activity and selectivity toward the total oxidation of CO and VOCs, the high cost and limited availability discourage their extensive applications. Transition metal oxides are alternatives to the noble metal-containing catalysts due to their resistance to halogens, low cost and high catalytic activity and selectivity.…”

Section: Introductionmentioning

confidence: 99%

Catalytic oxidation of CO and toluene over nanostructured mesoporous NiO/Ce0.8Zr0.2O2 catalysts

Bao

Deng

Jia

et al. 2011

Reac Kinet Mech Cat

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Mesoporous Ce 0.8 Zr 0.2 O 2 oxides were prepared by a surfactant-assisted method of nanocrystalline particle assembly, and used as a support of nickel oxide nanocatalysts. The obtained mesoporous NiO/Ce 0.8 Zr 0.2 O 2 nanocatalysts were characterized by XRD, N 2 adsorption, TEM, H 2 -TPR and X-ray photoelectron spectroscopy techniques. The catalytic properties of the NiO/Ce 0.8 Zr 0.2 O 2 nanocatalysts were evaluated by CO oxidation and toluene combustion. The results showed that the catalyst with 10 wt% NiO loading exhibited the highest catalytic activity for CO oxidation and toluene combustion.

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Toluene deep oxidation over noble metals, Copper and Vanadium Oxides

Cited by 21 publications

References 23 publications

Impact of silica structure of copper and iron-containing SBA-15 and SBA-16 materials on toluene oxidation

Impact of silica structure of copper and iron-containing SBA-15 and SBA-16 materials on toluene oxidation

Coupling Noble Metals and Carbon Supports in the Development of Combustion Catalysts for the Abatement of BTX Compounds in Air Streams

Catalytic oxidation of CO and toluene over nanostructured mesoporous NiO/Ce0.8Zr0.2O2 catalysts

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