Synthesis of CuMnOx catalysts by using various precipitants for oxidation of carbon monoxide

Abstract

Hopcalite (CuMnOx) is one of the best catalysts for carbon monoxide (CO) oxidation at ambient conditions. In present research work we measured the performances of various precipitants (KMnO 4 , Na 2 CO 3 and KOH) used in the CuMnOx catalysts synthesis by the co-precipitation method and calcined at 300°C temperature. The KMnO 4 precipitant used in CuMnOx catalyst has shown that the best catalytic activity, which completely oxidized CO at the lower temperature (T 100 = 83°C). The other precipitants used in CuMnOx catalyst synthesis by Na 2 CO 3 as precipitant for CO oxidation was done at (T 100 =105°C) and KOH used as precipitant in CuMnOx catalyst, which completely oxidized CO (T 100 =115°C). The calcinations conditions of precursors have huge impact on the performances of resulting catalysts for CO oxidation. The reactive calcinations (RC) conditions (1.5% CO in air) prepared CuMnOx catalysts have shown that the best catalytic activity as compared to the tradition calcinations conditions. The RC route is one of the best calcinations strategies for preparation of highly active CuMnO x catalyst for CO oxidation. • The choice of precipitant in precursor has significant effect in the designing of most suitable catalyst. • The KMnO 4 is one of the best precipitant for synthesis of highly active CuMnOx catalyst. • The reactive calcinations condition is produced highly active CuMnOx catalyst for CO oxidation.