II.1.2. Preparation of the Cu-Co-Rh / Zn-La catalysts - CoCuRhZnLa-CM

The ZnO-La₂O₃ support was prepared in the same way like CoCuZnLa-CM but with little different.

After calcination catalyst was prepared by incipient wetness impregnation at room temperature. 5 ml of aqueous solution containing the necessary amount of Co(NO₃)₂*6H₂O, Cu(NO₃)₂*6H₂O and rhodium (III) chloride trihydrate were used for impregnation 2.085 g of support. The impregnated sample was dried at 80 °C overnight and then calcined at 350 °C for 4 h.

3 g of 15% Cu – 15% Co – 0,5% Rh / 90% ZnO – 10% La₂O₃ catalyst were prepared.