Reforming of methane with carbon dioxide over Pt/ZrO2/SiO 2 catalysts - Effect of zirconia to silica ratio

Gunugunuri K. Reddy, Stéphane Loridant, Atsushi Takahashi, Pierre Delichère, Benjaram M. Reddy

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)

Abstract

ZrO2/SiO2 mixed oxides with different ratios (2:1 to 4:1) were prepared by a deposition-precipitation method from zirconium hydroxide and colloidal silica and used as supports for platinum nano-particles. The synthesized catalysts along with Pt/ZrO2 reference materials were tested for CH4 reforming with CO2 at a high temperature of 1073 K and at high space velocity. Very high reforming activity was observed for the Pt/ZrO2/SiO2 (4:1) sample among all the prepared catalysts. The effect of zirconia to silica ratio on the physico-chemical properties that determine the catalytic activity has been investigated characterizing all the catalysts after calcination, reduction as well as after reaction with several techniques. From X-ray diffraction patterns, BET and H2 chemisorption measurements, X-ray photoelectron and FTIR spectra, the better catalytic properties of the Pt/ZrO2/SiO2 (4:1) sample have been explained by higher Pt dispersion due to the absence of remaining free silica and the presence of amorphous ZrSiO4 in higher amount. Additionally, a better thermal stability of the prepared ZrO 2/SiO2 supports compared to ZrO2 was evidenced after ageing at 1073 K for 16 h in particular for the ratio 4:1. It also underlines the interest of the preparation method.

Original languageEnglish
Pages (from-to)92-100
Number of pages9
JournalApplied Catalysis A: General
Volume389
Issue number1-2
DOIs
Publication statusPublished - 2010 Dec 1
Externally publishedYes

Keywords

  • Carbon dioxide
  • Dry reforming
  • Methane
  • Pt supported catalysts
  • Syngas
  • ZrO/SiO support

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

Fingerprint Dive into the research topics of 'Reforming of methane with carbon dioxide over Pt/ZrO<sub>2</sub>/SiO <sub>2</sub> catalysts - Effect of zirconia to silica ratio'. Together they form a unique fingerprint.

Cite this