Method for detoxification of exhaust gases of internal combustion engines

Patent · Tue Apr 16 04:00:00 EDT 1974

OSTI ID:7126698

Santiago, A

An afterburner and catalyzer arrangement for reducing carbon monoxide, hydrocarbon, and nitrogen oxide emissions from motor vehicle internal combustion engines is described which precludes the danger of nitrogen dioxide formation associated with similar combinations employing excess air in afterburning. The proportions of hydrocarbons and CO in the exhaust are first diminished by oxidation in the afterburner; exhaust gas is then fed to a catalyzer where the remaining CO is reacted with the NO/sub x/ to produce harmless reaction products. The improvement consists of supplying by controllable air supply means to a point downstream of the engine exhaust outlet an air volume sufficient for only partial diminution of the CO such that the remaining CO corresponds to about 10 times the volume proportion of the NO/sub x/ in the exhaust. The stoichiometric proportions of CO and NO/sub x/ are thus reacted, with the NO/sub x/ being reduced to nitrogen and the CO being oxidized to CO/sub 2/.

• Assignee: Zeuna-Staerker KG
• Patent Number(s): US 3803839
• OSTI ID: 7126698
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330701* -- Emission Control-- Nitrogen Oxides
330702 -- Emission Control-- Carbon Monoxide
330704 -- Emission Control-- Hydrocarbons
AFTERBURNERS
AIR POLLUTION CONTROL
AUTOMOBILES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYTIC CONVERTERS
CHALCOGENIDES
DESIGN
ENGINES
EQUIPMENT
EXHAUST GASES
GASEOUS WASTES
HYDROCARBONS
INTERNAL COMBUSTION ENGINES
MIXING
NITROGEN COMPOUNDS
NITROGEN OXIDES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
VEHICLES
WASTES