Abstract
The conversion of ethanol to acetone in the presence of water vapour was studied in order to find the optimum catalyst composition, catalyst calcination temperature and reaction conditions and to deduce the reaction mechanism. A catalyst containing 10 mol-% calcium oxide gave the best ethanol conversion and acetone selectivity. This catalyst, calcined at 773 K, had the largest BET surface area and gave 100% ethanol conversion and 91% acetone selectivity at a reaction temperature of 674 K. A feasible mechanism is proposed that involves oxidation of adsorbed acetaldehyde by surface hydroxide ion as the rate-determining step.
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