Toluene oxidation on chromium- and copper-modified SiO2 and SBA-15

M. Popova, A. Szegedi, Z. Cherkezova-Zheleva, A. Dimitrova, I. Mitov

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

Copper- and chromium-modified SiO2 and SBA-15 materials, prepared by a wet impregnation technique, were investigated using X-ray diffraction (XRD), N2 physisorption, temperature-programmed reduction (TPR-DTG), temperature-programmed oxidation (TPO-DTG), UV-vis diffuse reflectance EPR and FT-IR spectroscopy. Their catalytic behavior was studied in the total oxidation of toluene. The supports had decisive role on the nature and dispersion of the formed metal species. The presence of chromium and copper species, mainly in tetrahedral coordination, was observed for the modified SBA-15 samples, while a significant amount of metal oxides is registered for the modified SiO2 ones. More finely dispersed chromium and copper species were formed on the bi-component copper- and chromium-containing SBA-15 catalysts and possessed higher activity in total oxidation of toluene. The optimal metal oxide content for highly active and selective SBA-15-supported catalyst was found to be 3 wt.% chromium and 7 wt.% copper.

Original languageEnglish
Pages (from-to)26-35
Number of pages10
JournalApplied Catalysis A: General
Volume381
Issue number1-2
DOIs
Publication statusPublished - Jun 15 2010

Fingerprint

Toluene
Chromium
Copper
Oxidation
Metals
Oxides
Physisorption
Catalyst supports
Impregnation
Paramagnetic resonance
Infrared spectroscopy
SBA-15
X ray diffraction
Temperature
Catalysts

Keywords

  • Copper- and chromium-modified SiO and SBA-15
  • Total oxidation of toluene

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

Cite this

Toluene oxidation on chromium- and copper-modified SiO2 and SBA-15. / Popova, M.; Szegedi, A.; Cherkezova-Zheleva, Z.; Dimitrova, A.; Mitov, I.

In: Applied Catalysis A: General, Vol. 381, No. 1-2, 15.06.2010, p. 26-35.

Research output: Contribution to journalArticle

Popova, M, Szegedi, A, Cherkezova-Zheleva, Z, Dimitrova, A & Mitov, I 2010, 'Toluene oxidation on chromium- and copper-modified SiO2 and SBA-15', Applied Catalysis A: General, vol. 381, no. 1-2, pp. 26-35. https://doi.org/10.1016/j.apcata.2010.03.040
Popova, M. ; Szegedi, A. ; Cherkezova-Zheleva, Z. ; Dimitrova, A. ; Mitov, I. / Toluene oxidation on chromium- and copper-modified SiO2 and SBA-15. In: Applied Catalysis A: General. 2010 ; Vol. 381, No. 1-2. pp. 26-35.
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AU - Mitov, I.

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