Process for absorbing and desorbing nitrogen oxides in exhaust g

Details Process for absorbing and desorbing nitrogen oxides in exhaust g Process for absorbing and desorbing nitrogen oxides in exhaust g

1996-05-09

1998-12-22

Lewis, Michael

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Mixture is exhaust from internal-combustion engine

4232391, B01D 5356

Patent

active

058515011

ABSTRACT:
A material and a process for adsorbing and desorbing nitrogen oxides in exhaust gas systems of engines running on a lean mixture, which does not require a prior oxidation step, wherein a mixed oxide which has an oxygen-rich orthorhombic structure is used which changes to an oxygen-poor tetragonal structure as a function of temperature.

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patent: 5457958 (1995-10-01), Boegner et al.
Arakawa, T., et al. "The Direct Reaction Between Nitric Oxide and the Superconductor . . . ", Materials Res. Bulletin, vol. 24, pp. 529-534, 1989.
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Derwent WPI Abstract of JP 04 100542A, First Published Apr. 2, 1992.
Abstract of DE 4319294 (See counterpart US 5,457,958), May 19, 1994.

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