Potassium/manganese nitrogen oxide traps for lean-burn engine op

Details Potassium/manganese nitrogen oxide traps for lean-burn engine op Potassium/manganese nitrogen oxide traps for lean-burn engine op

1995-09-21

1998-11-17

Lewis, Michael L.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Mixture is exhaust from internal-combustion engine

4232391, B01D 5356

Patent

active

058372121

ABSTRACT:
The invention is a nitrogen oxide trap comprising a porous support; and catalysts consisting of manganese and potassium loaded on the porous support. The trap may be used in an internal combustion engine exhaust gas catalyst system. During lean-burn operation of the engine the trap sorbs nitrogen oxides and releases the nitrogen oxides during decreased oxygen concentration in the exhaust gas.

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