EXHAUST GAS CATALYST WITH A REDUCED TENDENCY TO ACCUMULATE SULFUR DIOXIDE AND HYDROGEN SULFIDE EMISSIONS

摘要

An oxidizing and reducing exhaust gas purification catalystfor internal combustion engines, with a reduced tendency toaccumulate sulfur oxides and H2S emission contains active Al2O3 asa carrier, this being charged with CeO2 and optionally ZrO2, aswell as Pt, Pd, and/or Rh, and in addition containing 0.7 to 20%-wt B2O3 relative to the Al2O3.