NOx Adsorbers

A lean NOx trap (LNT) is a device that reduces nitrogen oxide (NOx) emissions from a lean burn internal combustion engine. It's also known as a NOx adsorber or NOx Storage-Reduction (NSR) catalyst.

How it works:
  • Oxidation: The LNT oxidizes NO intoNO2.
  • Entrapment: The LNT traps NO2 on an alkali Earth metal as nitrates.
  • Regeneration: The LNT regenerates in a fuel-rich atmosphere, reducing the trapped Nox to N2, NH3, and N2.

LNTs are preferably used in passenger cars and light-duty diesel engines