Abstract
Regulations on automobiles, construction machinery, ships and domestic boilers are being strengthened. This study is fundamental research to reduce the harmful gases emitted from domestic and industrial boilers using clean energy hydrogen (H₂). The de-NOx/CO performance of the catalyst supported by a noble metal Pt and the support TiO₂ was improved. In consideration of the improvement of the harmful gas reduction performance and the economic feasibility of the catalyst, the loading amount of Pt was appropriately 0.5 wt%. The 0.5Pt-2CeO₂/TiO₂ catalyst showed about 50% higher NOx conversion rate at 75℃ and 20% higher than the 0.5Pt/TiO₂ catalyst (STD), and the NOx conversion rate was improved up to about 70% even at a low temperature of 100℃. The reason for this is that the dispersion of the noble metal was improved when an appropriate amount of CeO₂ was loaded. Moreover, catalyst activity was improved by taking on the role as an oxygen storage material (OSC).
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