Production of hydrogen from dimethyl ether on supported Au catalysts

A. Gazsi, I. Ugrai, F. Solymosi

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

The adsorption and reactions of dimethyl ether (DME) were investigated on Au nanoparticles supported by various oxides and carbon Norit. Infrared spectroscopic and temperature programmed desorption studies revealed that DME adsorbs readily on most oxidic supports. A limited dissociation of DME to methoxy species was established on Au particles by IR spectroscopy. As regards the formation of hydrogen, Au/CeO2 is the most effective catalyst. On Au/Al2O3 catalyst the main process was the formation of methanol with a very small amount of hydrogen. Deposition of Au on CeO 2-Al2O3 mixed oxide resulted in a very active catalyst for H2 production. The yield for H2 in the reforming of DME approached the value of 73% at 723-773 K. This feature was explained by the hydrolysis of DME to methanol on alumina, and the fast decomposition of methanol at the Au/CeO2 interface. Adding potassium promoter to Au/CeO2-Al2O3 catalyst further enhanced the production of hydrogen as indicated by the increase of the yield to ∼87%. No deactivation of the catalyst was experienced at 773 K for the measured time, ∼10 h.

Original languageEnglish
Pages (from-to)360-366
Number of pages7
JournalApplied Catalysis A: General
Volume391
Issue number1-2
DOIs
Publication statusPublished - Jan 4 2011

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Keywords

  • Au catalyst
  • CeO support
  • Decomposition of dimethyl ether
  • Hydrogen production
  • IR spectra of adsorbed dimethyl ether
  • Reforming of dimethyl ether

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

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