A lean NO.sub.x trap composition. The lean NO.sub.x trap composition utilizes ruthenium in place of higher cost metals such as platinum. The lean NO.sub.x trap composition provides high NO.sub.x storage efficiency and high NO.sub.x conversion efficiency when incorporated in a lean NO.sub.x trap. A method of removing harmful gases using the lean NO.sub.x trap composition is also described.

 
Web www.patentalert.com

< Method of recovering energy using a catalytic finned heat exchanger

> Multilayered catalyst compositions

> Process for hydrothermal production of sodium silicate solutions and precipitated silicas

~ 00561