Catalytic activity of copper and palladium based catalysts for toluene total oxidation

Tidahy, Haingomalala Lucette; Siffert, Stéphane; Wyrwalski, F.; Lamonier, Jean‐François; Aboukaı̈s, Antoine

doi:10.1016/j.cattod.2006.08.023

Cited by 139 publications

(83 citation statements)

References 22 publications

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“…The small size of the Co3O4 or CuO particles and/or the interaction of transition metal species with the zirconia surface may explain their reduction at lower temperature [21,[61][62][63]. This suggests that the support favors the surface dispersion of the oxide, increasing the reducibility.…”

Section: 7 293mentioning

confidence: 99%

Total Oxidation of Naphthalene with Zirconia-Supported Cobalt, Copper and Nickel Catalysts

et al. 2017

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ZrO 2 ·nH 2 O (hydrogel) impregnated with transition metals (Cu, Co, and Ni) was studied in this work as a precursor for the synthesis of CuO/ZrO 2 (CuZ), CoO x /ZrO 2 (CoZ), and NiO/ZrO 2 (NiZ) catalysts, employed in the naphthalene oxidation reaction. Fresh and catalytically used materials were characterized by different physicochemical techniques, to compare the bulk and surface behavior, with particular attention to the effect of the supported metal species' properties on the catalytic activity. Techniques such as X-ray diffraction (XRD), temperature programmed reduction (TPR), differential scanning calorimetry (DSC), Brunauer-Emmett-Teller (BET) surface area analyzer, diffuse reflectance spectroscopy (DRS UV-vis), and Raman spectroscopy, allow for establishing structural and textural aspects of the support, as well as the surface coordination and the accessibility of supported species. Results were in agreement with the CuZ > CoZ > NiZ sequence for the activity in naphthalene oxidation reaction. Electronic properties, ionic sizes, oxide phase deposition on the support surface, reducibility, metal-support interaction, and local site symmetry of metals seem to be decisive factors for the catalytic interaction with the gaseous phase.

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Section: 7 293mentioning

confidence: 99%

Total Oxidation of Naphthalene with Zirconia-Supported Cobalt, Copper and Nickel Catalysts

et al. 2017

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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%

“…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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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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“…Catalytic oxidation of toluene can be carried out at temperatures 200-600 °C lower than that for thermal oxidation and has high selectivity for the formation of harmless reaction products such as H2O and CO2 [4]. Supported noble metal (Pt, Pd, Rh) materials have been intensively examined in VOC catalytic combustion, but their limited availability and high price have encouraged their replacement by other active phases [5][6][7]. Transition metal oxides have been found to be very active and present advantages over noble metals associated with their lower cost, higher thermal stability and greater resistance to poisoning [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Removal of Toluene over NaX Zeolite Exchanged with Cu2+

et al. 2015

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Toluene is a major air pollutant emitted from painting and metal coating processes and might have some health effects. Adsorption and catalytic complete oxidation are promising ways to retain or convert toluene into harmless products. The present work aims to develop a bifunctional material which can be used as an adsorbent and catalyst for low-temperature toluene removal. Copper zeolites were obtained by exchanging the sodium in the parent NaX zeolite with copper from aqueous solutions of Cu(NO3)2•2.5H2O. Several characterization techniques, H2-TPR, XPS, XRD and N2 physisorption, were used in order to evaluate the redox, surface, structural and textural properties of the materials, respectively. The various materials were tested in adsorption and catalytic processes. The sample with low copper content (1 wt. %) exhibited promising features in terms of toluene adsorption capacity and total oxidation. The results can be correlated to the presence of micropores and well-dispersed CuO species. OPEN ACCESSCatalysts 2015, 5 1480

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Catalytic activity of copper and palladium based catalysts for toluene total oxidation

Cited by 139 publications

References 22 publications

Total Oxidation of Naphthalene with Zirconia-Supported Cobalt, Copper and Nickel Catalysts

Total Oxidation of Naphthalene with Zirconia-Supported Cobalt, Copper and Nickel Catalysts

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

Removal of Toluene over NaX Zeolite Exchanged with Cu2+

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