Apparatus for removing nitrogen oxides from engine exhaust

Patent · Tue Apr 02 04:00:00 EDT 1974

OSTI ID:7351532

Mark, J A

A method for removing nitrogen oxides from combustion engine exhausts is described which precludes prior art disadvantages of repair and maintenance requirements, complexity of design, and engine performance diminution. Exhaust gases are transferred into a container of saturated urea solution via a gas distribution means. Oxides of nitrogen in the exhaust gas react with the urea, resulting in the production of water vapor, carbon dioxide, and nitrogen. The product gases are then passed through a condenser which recovers water for replacement into the liquid-filled container. Following condensation, the gases are vented to the atmosphere. The speed of reaction within the container can be increased by means of a catalyst, with the preferred catalytic material being copper. (Air Pollut. Abstr.)

• Assignee: APA; EDB-76-053514; ERA-01-019871
• Patent Number(s): US 3801696
• OSTI ID: 7351532
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330701* -- Emission Control-- Nitrogen Oxides
AMIDES
AUTOMOBILES
CARBONIC ACID DERIVATIVES
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTIONS
DESIGN
EQUIPMENT
EXHAUST GASES
GASEOUS WASTES
NITROGEN COMPOUNDS
NITROGEN OXIDES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL EQUIPMENT
UREA
VEHICLES
WASTES