Thermal characterisation of alumina supported chromium and platinum–chromium catalysts

This study presented results on reduction of alumina supported chromium and platinum–chromium catalysts using temperature programmed reduction method (TPR). It has been shown that catalysts after earlier oxidation step but without calcinations one undergo reduction in lower temperature in comparison to calcined only catalysts. Moreover, addition platinum to Cr/Al2O3 catalysts also caused decrease of reduction temperature. It has been observed that over the examined catalysts oxidation CO to CO2 and reduction CO to CH4 occurs. However, on Pt–Cr catalysts both reactions proceed at lower temperature compare to Cr catalysts.