Phosphated ceria, selective catalysts for oxidative dehydrogenation of isobutane

Ioan Cezar Marcu, Marcel Nicu Urlan, A. Rédey, Ioan Sǎndulescu

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The oxidative dehydrogenation (ODH) of isobutane over pure ceria and phosphated ceria catalysts, containing two different amounts of phosphorus, was examined at temperatures ranging from 450 to 610 °C. The catalysts were characterized using nitrogen adsorption, DRX, SEM, EDX, XPS and TPR techniques. Adding phosphorus to ceria and increasing the phosphorus content results in a modification of the physicochemical characteristics of the catalyst, the redox ability of the catalytic material being strongly diminished. At the same time, by adding phosphorus to ceria and increasing the phosphorus content, a decrease of the catalytic activity accompanied by an important increase of the selectivity for isobutene, mainly at the expense of carbon oxides, was observed. A compensation effect in catalysis was also observed for the isobutane conversion on this series of catalysts.

Original languageEnglish
Pages (from-to)365-371
Number of pages7
JournalComptes Rendus Chimie
Volume13
Issue number3
DOIs
Publication statusPublished - Mar 2010

Fingerprint

Butanes
Cerium compounds
Dehydrogenation
Phosphorus
Catalysts
Oxides
Catalysis
Energy dispersive spectroscopy
Catalyst activity
Nitrogen
Carbon
X ray photoelectron spectroscopy
Adsorption
Scanning electron microscopy

Keywords

  • Cation reducibility
  • Isobutane
  • Oxidative dehydrogenation
  • Phosphated ceria

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)

Cite this

Phosphated ceria, selective catalysts for oxidative dehydrogenation of isobutane. / Marcu, Ioan Cezar; Urlan, Marcel Nicu; Rédey, A.; Sǎndulescu, Ioan.

In: Comptes Rendus Chimie, Vol. 13, No. 3, 03.2010, p. 365-371.

Research output: Contribution to journalArticle

Marcu, Ioan Cezar ; Urlan, Marcel Nicu ; Rédey, A. ; Sǎndulescu, Ioan. / Phosphated ceria, selective catalysts for oxidative dehydrogenation of isobutane. In: Comptes Rendus Chimie. 2010 ; Vol. 13, No. 3. pp. 365-371.
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