Integrated SCR catalyst and LNT for NOx abatement

摘要

Certain catalyst articles, systems or methods provide excellent NOx conversion and are particularly suitable for low temperature NOx conversion. The articles, systems and methods are suitable, for example, for the treatment of exhaust gases from diesel engines. Certain articles or systems include an upstream SCR composition and a downstream LNT composition. The substrate (s) can advantageously be heated electrically.