Selective oxidation of CO in hydrogen-rich mixtures and kinetics investigation on platinum-gold supported on zinc oxide catalyst

Y. H. Wang, J. L. Zhu, J. C. Zhang, L. F. Song, J. Y. Hu, S. L. Ong, W. J. Ng

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

A series of gold zinc oxide catalysts have been prepared using a coprecipitation procedure and selective oxidation of CO in hydrogen-rich mixtures was investigated in a fixed-bed reactor in the temperature range from 313 to 393 K. The results showed that the suitable content of Au in ZnO was about 1.5 wt.% and calcined at 573 K, shortened as Au (1.5)/ZnO-573. Stability investigation, performed at 353 K and lasted for 500 h, indicated Au (1.5)/ZnO-573 catalyst activity was slightly deteriorated as time on stream was over 350 h. Investigation indicated little addition of platinum into Au (1.5)/ZnO-573 catalyst could definitely improve its stability. However, further study showed that the selectivity of removal of CO from hydrogen-rich mixtures for Au (1.5)-Pt/ZnO-573 catalyst would be decreased with increasing content of Pt on the catalyst when Pt content was over 1.0 wt.%, which indicates that the suitable content of Pt would be 1.0 wt.% and the catalyst was indicated as Au (1.5)-Pt (1.0)/ZnO-573. Kinetic experiments performed on it were carried out in an isothermal fixed-bed microreactor under intrinsic conditions.

Original languageEnglish
Pages (from-to)440-446
Number of pages7
JournalJournal of Power Sources
Volume155
Issue number2
StatePublished - Apr 21 2006

Keywords

  • Au-Pt/ZnO catalyst
  • Hydrogen
  • Kinetics
  • Selective oxidation CO
  • Selectivity

Fingerprint Dive into the research topics of 'Selective oxidation of CO in hydrogen-rich mixtures and kinetics investigation on platinum-gold supported on zinc oxide catalyst'. Together they form a unique fingerprint.

Cite this