Nitrogen oxides storage catalysts containing cobalt

Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Mixture is exhaust from internal-combustion engine

Reexamination Certificate

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C423S213500, C423S239100, C060S299000, C060S301000, C502S325000, C502S326000, C502S328000, C502S340000, C502S300000

Reexamination Certificate

active

07811536

ABSTRACT:
Nitrogen oxides (NOx) storage catalysts comprising cobalt and barium with a lean NOxstorage ratio of 1.3 or greater. The NOxstorage catalysts can be used to reduce NOxemissions from diesel or gas combustion engines by contacting the catalysts with the exhaust gas from the engines. The NOxstorage catalysts can be one of the active components of a catalytic converter, which is used to treat exhaust gas from such engines.

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