공업화학,촉매/반응공학 : Co가 첨가된 Cu-Ce/γ-Al2O3 촉매상에서 개질수소가스에 포함된 CO의 선택적 산화반응: (2) CO2와 H2O의 영향 = Industrial Chemistry,Catalysis/Reaction Engineering : Selective Oxidation of CO in Hydrogen Rich Stream over Cu-Ce/γ-Al2O3 Catalysts Doped with Co: (2) CO2 and H2O Effect

다국어 초록 (Multilingual Abstract)

Cu-Ce/r-Al₂O₃ and Cu-Ce-Co/r-Al₂O₃ promoted with 0.2wt% Co were prepared and their catalytic performance was evaluated for the selective oxidation of CO in a H₂-rich condition(1 vol.% CO+1 vol.% Ox+60 vol.% He in N2 balance). When CO₂ and H₂O were present in the reformed gas feed, both Cu-Ce/r-Al₂O₃ and Cu-Ce-Co/r-Al₂O₃ showed decrease in oxidation activity of CO at low temperatures especially under 200℃. Compared with the Cu-Ce/r-Al₂O₃, however, the Cu-CeCo/r-Al₂O₃ showed higher resistance for the CO₂ and H₂O and also there existed a temperature window of T_(99.9) from 210 to 225℃ corresponding to the conversion of 99.9% CO. From CO₂/H₂O-TPD, it can be concluded that the main cause for the decrease in catalytic activity may be attributed to the blockage of the active sites by competitive adsorption of water vapor and CO₂ with the reactant at low reaction temperatures.