Complete oxidation of methane over Pt/CeO2-Al2O3catalysts

R. Ramírez-López, L. Balderas-Tapia, I. Elizalde-Martinez, T. Viveros

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Abstract

Pt catalysts supported on mixed CeO2-Al2O3carriers with different CeO2loadings (2-50 wt.%) were prepared by the sol-gel method. Several techniques such as N2physisorption, X-ray diffraction (XRD), temperature-programmed reduction (TPR), and inductively coupled plasma atomic emission spectroscopy (ICP-AES) were applied to characterize the physicochemical properties of the catalysts. The temperature-programmed reduction plots indicated that the reduction of the corresponding oxygen species becomes difficult in the samples with high cerium contents due to the fact that reduction of the oxygen from the lattice requires more energy, i.e., greater temperature. The catalysts were tested on the methane oxidation reaction. The results of the tests of Pt/CeO2-Al2O3catalysts showed a suppression of the activity when the content of CeO2was increased, although Pt catalyst with 50 wt.% of CeO2exhibited the highest specific activity. © Taylor & Francis Group, LLC.
Original languageAmerican English
Pages (from-to)1189-1197
Number of pages9
JournalChemical Engineering Communications
DOIs
StatePublished - 1 Oct 2009

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Methane
Oxidation
Catalysts
Atomic emission spectroscopy
Oxygen
Cerium
Inductively coupled plasma
Catalyst supports
Temperature
Sol-gel process
X ray diffraction

Cite this

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title = "Complete oxidation of methane over Pt/CeO2-Al2O3catalysts",
abstract = "Pt catalysts supported on mixed CeO2-Al2O3carriers with different CeO2loadings (2-50 wt.{\%}) were prepared by the sol-gel method. Several techniques such as N2physisorption, X-ray diffraction (XRD), temperature-programmed reduction (TPR), and inductively coupled plasma atomic emission spectroscopy (ICP-AES) were applied to characterize the physicochemical properties of the catalysts. The temperature-programmed reduction plots indicated that the reduction of the corresponding oxygen species becomes difficult in the samples with high cerium contents due to the fact that reduction of the oxygen from the lattice requires more energy, i.e., greater temperature. The catalysts were tested on the methane oxidation reaction. The results of the tests of Pt/CeO2-Al2O3catalysts showed a suppression of the activity when the content of CeO2was increased, although Pt catalyst with 50 wt.{\%} of CeO2exhibited the highest specific activity. {\circledC} Taylor & Francis Group, LLC.",
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Complete oxidation of methane over Pt/CeO2-Al2O3catalysts. / Ramírez-López, R.; Balderas-Tapia, L.; Elizalde-Martinez, I.; Viveros, T.

In: Chemical Engineering Communications, 01.10.2009, p. 1189-1197.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Complete oxidation of methane over Pt/CeO2-Al2O3catalysts

AU - Ramírez-López, R.

AU - Balderas-Tapia, L.

AU - Elizalde-Martinez, I.

AU - Viveros, T.

PY - 2009/10/1

Y1 - 2009/10/1

N2 - Pt catalysts supported on mixed CeO2-Al2O3carriers with different CeO2loadings (2-50 wt.%) were prepared by the sol-gel method. Several techniques such as N2physisorption, X-ray diffraction (XRD), temperature-programmed reduction (TPR), and inductively coupled plasma atomic emission spectroscopy (ICP-AES) were applied to characterize the physicochemical properties of the catalysts. The temperature-programmed reduction plots indicated that the reduction of the corresponding oxygen species becomes difficult in the samples with high cerium contents due to the fact that reduction of the oxygen from the lattice requires more energy, i.e., greater temperature. The catalysts were tested on the methane oxidation reaction. The results of the tests of Pt/CeO2-Al2O3catalysts showed a suppression of the activity when the content of CeO2was increased, although Pt catalyst with 50 wt.% of CeO2exhibited the highest specific activity. © Taylor & Francis Group, LLC.

AB - Pt catalysts supported on mixed CeO2-Al2O3carriers with different CeO2loadings (2-50 wt.%) were prepared by the sol-gel method. Several techniques such as N2physisorption, X-ray diffraction (XRD), temperature-programmed reduction (TPR), and inductively coupled plasma atomic emission spectroscopy (ICP-AES) were applied to characterize the physicochemical properties of the catalysts. The temperature-programmed reduction plots indicated that the reduction of the corresponding oxygen species becomes difficult in the samples with high cerium contents due to the fact that reduction of the oxygen from the lattice requires more energy, i.e., greater temperature. The catalysts were tested on the methane oxidation reaction. The results of the tests of Pt/CeO2-Al2O3catalysts showed a suppression of the activity when the content of CeO2was increased, although Pt catalyst with 50 wt.% of CeO2exhibited the highest specific activity. © Taylor & Francis Group, LLC.

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DO - 10.1080/00986440902831813

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JO - Chemical Engineering Communications

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SN - 0098-6445

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