Development of Iron Catalyst Technologies to Improve Exhaust-emission Purification Performance for Gasoline Engines

Abstract

Iron should be one of candidates as an alternative material for Palladium due to its high oxidation activity. According to investigation results with Iron based three-way catalysts, it was found that the Iron particles accelerate the deterioration of oxygen storage materials after severe thermal aging. Several chemical analysis results indicate the Iron location on the support materials should be key methodology to improve catalytic activity. Therefore to avoid contact with Iron particles and oxygen storage materials leads better purification performance of Iron loaded TWC as compared with current Pd loaded TWC.