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TAP study of toluene total oxidation over a Co3O4/La-CeO2 catalyst with an application as a washcoat of cordierite honeycomb monoliths

(2014) PHYSICAL CHEMISTRY CHEMICAL PHYSICS. 16(23). p.11447-11455
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Organization
Abstract
The total oxidation of toluene was studied over a Co3O4/La-CeO2 catalyst in a Temporal Analysis of Products (TAP) set-up in the temperature range 713 K to 873 K in the presence and absence of dioxygen. It has been demonstrated that the reaction proceeds via a Mars-van Krevelen mechanism. The reaction rate increased 8.4 times if both toluene and dioxygen were present in the feed. The partial reaction order with respect to O-2 diminished from 0.9 to 0.6 with an increase in temperature from 763 to 873 K. Adsorbed oxygen species with a lifetime of similar to 8 s have been found on a catalyst fully oxidized by dioxygen. Catalysis of isotopically labeled O-18(2)/(C6H5CH3)-C-12-C-13 results in the formation of products containing O-18, which indicates that both lattice and adsorbed oxygen are involved in the total oxidation of toluene. The role of adsorbed oxygen is activation of the C-H bond in toluene. The reaction network of the catalytic total oxidation of toluene consists of the following sequence: adsorption of toluene on the catalyst surface; activation of toluene by dehydrogenation with adsorbed oxygen; oxidation of activated toluene mainly by the lattice oxygen and re-oxidation of the reduced catalyst by dioxygen.
Keywords
NANOCRYSTALLINE COBALT OXIDE, VOLATILE ORGANIC-COMPOUNDS, MIXED OXIDES, SELECTIVE OXIDATION, LIGHT-HYDROCARBONS, VOC OXIDATION, ACTIVE-SITES, COMBUSTION, OXYGEN, CO3O4

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Citation

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MLA
Gómez Cabal, Diana, Vladimir Galvita, JM Gatica, et al. “TAP Study of Toluene Total Oxidation over a Co3O4/La-CeO2 Catalyst with an Application as a Washcoat of Cordierite Honeycomb Monoliths.” PHYSICAL CHEMISTRY CHEMICAL PHYSICS 16.23 (2014): 11447–11455. Print.
APA
Gómez Cabal, D., Galvita, V., Gatica, J., Vidal, H., & Marin, G. (2014). TAP study of toluene total oxidation over a Co3O4/La-CeO2 catalyst with an application as a washcoat of cordierite honeycomb monoliths. PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 16(23), 11447–11455.
Chicago author-date
Gómez Cabal, Diana, Vladimir Galvita, JM Gatica, H Vidal, and Guy Marin. 2014. “TAP Study of Toluene Total Oxidation over a Co3O4/La-CeO2 Catalyst with an Application as a Washcoat of Cordierite Honeycomb Monoliths.” Physical Chemistry Chemical Physics 16 (23): 11447–11455.
Chicago author-date (all authors)
Gómez Cabal, Diana, Vladimir Galvita, JM Gatica, H Vidal, and Guy Marin. 2014. “TAP Study of Toluene Total Oxidation over a Co3O4/La-CeO2 Catalyst with an Application as a Washcoat of Cordierite Honeycomb Monoliths.” Physical Chemistry Chemical Physics 16 (23): 11447–11455.
Vancouver
1.
Gómez Cabal D, Galvita V, Gatica J, Vidal H, Marin G. TAP study of toluene total oxidation over a Co3O4/La-CeO2 catalyst with an application as a washcoat of cordierite honeycomb monoliths. PHYSICAL CHEMISTRY CHEMICAL PHYSICS. 2014;16(23):11447–55.
IEEE
[1]
D. Gómez Cabal, V. Galvita, J. Gatica, H. Vidal, and G. Marin, “TAP study of toluene total oxidation over a Co3O4/La-CeO2 catalyst with an application as a washcoat of cordierite honeycomb monoliths,” PHYSICAL CHEMISTRY CHEMICAL PHYSICS, vol. 16, no. 23, pp. 11447–11455, 2014.
@article{5674265,
  abstract     = {The total oxidation of toluene was studied over a Co3O4/La-CeO2 catalyst in a Temporal Analysis of Products (TAP) set-up in the temperature range 713 K to 873 K in the presence and absence of dioxygen. It has been demonstrated that the reaction proceeds via a Mars-van Krevelen mechanism. The reaction rate increased 8.4 times if both toluene and dioxygen were present in the feed. The partial reaction order with respect to O-2 diminished from 0.9 to 0.6 with an increase in temperature from 763 to 873 K. Adsorbed oxygen species with a lifetime of similar to 8 s have been found on a catalyst fully oxidized by dioxygen. Catalysis of isotopically labeled O-18(2)/(C6H5CH3)-C-12-C-13 results in the formation of products containing O-18, which indicates that both lattice and adsorbed oxygen are involved in the total oxidation of toluene. The role of adsorbed oxygen is activation of the C-H bond in toluene. The reaction network of the catalytic total oxidation of toluene consists of the following sequence: adsorption of toluene on the catalyst surface; activation of toluene by dehydrogenation with adsorbed oxygen; oxidation of activated toluene mainly by the lattice oxygen and re-oxidation of the reduced catalyst by dioxygen.},
  author       = {Gómez Cabal, Diana and Galvita, Vladimir and Gatica, JM and Vidal, H and Marin, Guy},
  issn         = {1463-9076},
  journal      = {PHYSICAL CHEMISTRY CHEMICAL PHYSICS},
  keywords     = {NANOCRYSTALLINE COBALT OXIDE,VOLATILE ORGANIC-COMPOUNDS,MIXED OXIDES,SELECTIVE OXIDATION,LIGHT-HYDROCARBONS,VOC OXIDATION,ACTIVE-SITES,COMBUSTION,OXYGEN,CO3O4},
  language     = {eng},
  number       = {23},
  pages        = {11447--11455},
  title        = {TAP study of toluene total oxidation over a Co3O4/La-CeO2 catalyst with an application as a washcoat of cordierite honeycomb monoliths},
  url          = {http://dx.doi.org/10.1039/c4cp00886c},
  volume       = {16},
  year         = {2014},
}

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