Removal of nitrogen oxide from exhaust gas

Details Removal of nitrogen oxide from exhaust gas Removal of nitrogen oxide from exhaust gas

1996-10-17

1998-12-29

Straub, Gary P.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Mixture is exhaust from internal-combustion engine

4232391, B01J 802

Patent

active

058536795

ABSTRACT:
A process for removing nitrogen oxide from exhaust is disclosed, comprising contacting exhaust containing nitrogen oxide with an alumina catalyst which contains not more than 0.5% by weight of an alkali metal and/or an alkaline earth metal and has a total pore volume of from 0.48 to 1.2 cm.sup.3 .multidot.g.sup.-1 with 0.26 to 0.6 cm.sup.3 .multidot.g.sup.-1 of the total pore volume being formed of pores of not greater than 80 .ANG. or has a volume of pores formed of pores of not greater than 60 .ANG. of from 0.06 to 0.2 cm.sup.3 .multidot.g.sup.-l and which may have supported thereon tin in an oxidative atmosphere containing excess oxygen in the presence of a hydrocarbon or an oxygen-containing organic compound.

REFERENCES:
patent: 4529718 (1985-07-01), Dupin
patent: 4771029 (1988-09-01), Pereira et al.
patent: 4908192 (1990-03-01), Harrison et al.
patent: 5336476 (1994-08-01), Kintaichi et al.

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