| 초록 |
Nitrous oxide which contributes to catalytic stratospheric ozone destruction is a strong greenhouse effects gas. Catalytic decomposition of N2O and selective catalytic reduction of N2O with reductants such as hydrocarbons have been proposed as the method of N2O abatement. The catalytic decomposition of N2O was studied over Mg-Fe hydrotalcite-like catalysts (Mg/Fe molar ratios of 1:1, 2:1, 3;1, 1:2) prepared by hydrothermal and co-precipitation methods (varying Mg/Fe molar ratios). For comparison, Co, Cu, Fe, Ni, Ce hydrotalcite-like compounds were prepared by hydrothermal synthesis hydrotalcite-like compounds and Mg-Fe oxide catalysts were characterized using various. The reactions were carried out under atmospheric pressure in the temperature range 300-600oC and the reactant mixture was typically composed of 5000 ppm N2O in balance He. The effect of N2O and O2 concentration on the catalytic behavior has been investigated. According to pretreatment temperature, the decomposition experiments of nitrous oxide were also performed. The correlation between catalytic activity and oxidation state of transition metals Fe was discussed. |
