| 초록 |
Lean NOx removal has long been a great issue. A NOx storage-reduction system which has been proposed as one of the most promising solution for lean NOx removal has got very fast development. As known, the lean NOx traps typically should use a precious metal (Pt or Rh) that catalyses the oxidation of NO to NO2 so as to be adsorbed preferentially, which causes to increase the catalyst cost. We are introducing mixed metal oxide (MMO) catalysts, which are performing high selective adsorption of lean NOx without oxidation step and high reduction efficiencies as well in the removal. |
