Elsevier

Applied Catalysis

Volume 30, Issue 2, 15 April 1987, Pages 333-338
Applied Catalysis

Mechanism of methanol synthesis from CO2/CO/H2 mixtures over copper/zinc oxide/alumina catalysts: use of14C-labelled reactants

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Abstract

The addition of14CO or14CO2 tracers to CO2/CO/H2 reactant mixtures for methanol synthesis over a commercial copper/zinc oxide/alumina catalyst was used to determine the origin of the carbon in the product. For PCO2/PCO ratios from 0.02 to 1 the fraction of methanol made from carbon dioxide rises from ∼0.7 to ∼1, so carbon dioxide is the major reactant under industrial conditions. There is no carbon-containing surface intermediate common to methanol synthesis and the water-gas shift reaction.

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