77.固体炭素によるNOの還元における表面化合物の役割

概要

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The carbon-NO reaction has been studied in the presence of oxygen. Oxygen enhances the reaction rate through the formation of surface oxygen complexes. Not only the oxygen complexes but also nitrogen complexes were formed on carbon surface. These nitrogen complexes were identified by XPS. The peaks were assigned to pyridinic, pyrrolic, quaternary, -NO and -NO_2 type nitrogen. Generally, pyridinic and pyrrolic nitrogen were much more than others. N_2 formation during the NO_x reduction takes place by the reaction of these nitrogen complexes. The effect of the type of carbon on the reduction of NO also was examined by using three carbons with different surface areas. TPR experiments revealed that the carbon with a higher surface area is more reactive, and that carbon-O_2 reaction is essential for the carbon-NO reaction.
一般社団法人日本エネルギー学会の論文
1994-08-31