Abstract:
The aim of this research was to investigate the catalytic properties of bimetallic Au-CuO supported on CeO₂ in preferential CO oxidation (PROX) and CO removal decreased to less than 100 ppm. The catalysts were prepared by deposition precipitation (DP) method. The XRD SEM TEM BET TPR and FT-IR were used to analyze the catalyst characterization. From the experiment results, AuCuO/CeO₂ catalyst was active than Au/CeO₂ and CuO/CeO₂ catalysts in range of 70 110 °C. Using Na₂CO₃ as precipitating reagent, the AuCuO/CeO₂ catalyst showed higher selectivity than the catalysts were prepared by NaOH and NH₄OH. Moreover, 0.5%(1:1)AuCuO/CeO₂ catalyst which was the highest surface area about 74 m2/g showed 100% CO conversion and 62% CO selectivity at 70 °C. For adding H₂O CO₂ and H₂O CO₂ in feed stream, the activity of 0.5%(1:1)AuCuO/CeO₂ decreased to 99% 80% and 90% CO conversion respectively. The regenerate catalyst showed the catalytic activity likely the new catalyst. The stability of 0.5%(1:1)AuCuO/CeO₂ catalyst was constant about 100 % conversion and 62% selectivity for 360 minutes at 70 °C.