Catalysis Letters

, Volume 3, Issue 1, pp 65–72 | Cite as

Structure and reactivity of Zn-Cr mixed oxides. Role of non-stoichiometry in the catalytic synthesis of methanol

  • E. Errani
  • F. Trifiro
  • A. Vaccari
  • M. Richter
  • G. Del Piero
Article

Abstract

The catalytic behaviour of Zn/Cr mixed oxides with different compositions was investigated as a function of the bulk and surface properties. It was observed that non-stoichiometric spinel-type phases were stable also in the reaction conditions, in which zinc-surface enrichment did not occur. The maximum productivity in methanol was observed for monophasic non-stoichiometric spinel-type samples with a Zn/Cr ratio near to one, whereas the samples richest in zinc, for which a side phase, ZnO also was detected, showed a strong decrease in activity. The catalytic data support the hypothesis that non-stoichiometric spinel is the active phase for the synthesis of methanol on coprecipitated Zn-Cr catalysts.

Methanol synthesis zinc-chromium mixed oxides 

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Copyright information

© J.C. Baltzer A.G. Scientific Publishing Company 1989

Authors and Affiliations

  • E. Errani
    • 1
  • F. Trifiro
    • 1
  • A. Vaccari
    • 1
  • M. Richter
    • 2
  • G. Del Piero
    • 3
  1. 1.Dipartimento di Chimica Industriale e dei MaterialiBolognaItaly
  2. 2.Centr. Inst. Phys. ChemistryAcademy of SciencesBerlinDDR
  3. 3.ENIRICERCHESan Donato MilaneseItaly

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