Bulk Co3O4 for Methane Oxidation: Effect of the Synthesis Route on Physico-Chemical Properties and Catalytic Performance

The synthesis of bulk pure Co3O4 catalysts by different routes has been examined in order to obtain highly active for lean methane combustion. Thus, eight methodologies, which were selected based on their relatively low complexity and easiness scale-up, evaluated. investigated procedures direct calcination two cobalt precursors (cobalt nitrate hydroxycarbonate), basic grinding route, precipitation with ammonium carbonate sodium carbonate, precipitation-oxidation, solution combustion sol-gel complexation. A commercial was also used as a reference. Among the several hydroxycarbonate (HC sample), (GB sample) employing precipitating agent (CC produced fairly good textural structural properties, remarkable redox found be crucial performance oxidation methane. All attained full conversion 100% selectivity towards CO2 formation at temperature 600 °C while operating 60,000 h?1. these, CC catalyst only one that achieved specific reaction rate higher than reference catalyst.