Removal of nitrogen oxides from exhaust gas using catalyst

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

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4232391, B01D 5394

Patent

active

060933771

ABSTRACT:
Exhaust gas from internal combustion engines is treated with catalyst comprising an inorganic oxide supporter which supports at least one of noble metals selected from Rh, Pt, and Pd, alkali rare earth metals, rare earth metals, and magnesium in order to remove NOx effectively with superior durability of the catalyst notwithstanding the internal combustion engine is under a stoichiometric operation condition or a lean burning operation condition.

REFERENCES:
patent: 4906176 (1990-03-01), Yamashita et al.
patent: 5260249 (1993-11-01), Shiraishi et al.
patent: 5412945 (1995-05-01), Katoh et al.
patent: 5575983 (1996-11-01), Suzuki et al.
Tabata et al.: 68th Shokubai Touronkai 3F108, 3G327 (1991).

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