Abstract
In this study, La0.6Sr0.4Co0.95Cu0.05O3-δ(LSCC) has been used as electrochemical-catalytic cathode material which is for nitrogen oxide reduction in vehicles exhaust. The reason for choose LSCC mainly because LaSrCoO3 material can be operated under wide temperature range. Otherwise, excess copper will spillover on the catalyst’s surface and cause active site covered by copper. Therefore, the quantity contained of copper will be controlled at 5 mol%. In many other thesis where the catalyst used as nitride oxide reduction experiments which were carried out with adding water vapor, carbon dioxide or sulfur dioxide and other substances, caused the reduction of nitrogen oxides been suppressed, or even poisoned catalyst. Nevertheless, in this study we found that adding sulfur dioxide nitrogen oxides for this device dealing with little effect. And the contribution of water vapor and carbon dioxide are beneficial for ceramic electrochemical-catalyst. due to the reaction is diffusion control under low nitride oxide concentration so this effect is more remarkable under low concentration of nitride oxide (about less than 300ppm). Further experiments which the ceramic electrochemical-catalyst we use contains no Pd-GDC as oxidation catalyst layer. Found that the effect of water vapor than carbon dioxide, suggesting that should cause the effect of Pd-GDC, but this study were present only a preliminary inference Pd and GDC and reaction mechanism of carbon dioxide, the actual situation requires further experiments confirmed. Compare this result with "the lower the NOx concentration, the higher the nitrogen oxide conversion rate" which can be seen in "NOx concentrations versus conversion" graph, this technology is likely to completely eliminate pollution of nitrogen oxides and lean-burn engines’ exhaust with no nitrogen oxides pollution be possible.