Ammonia storage and injection in NOx control
AssigneeKleenAir Systems, Inc.
InventorsLester P. Berriman, John M. Zabsky, Lionel S. Simons
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Abstract
A system is described for storing ammonia and injecting it into the exhaust gas stream of an engine to reduce nitrogen oxides. The ammonia is stored as a liquid mixture (70) of ammonia and water in a container (50). In one system, the mixture passes through a tube with a portion (62) in contact with the exhaust gas pipe (16) to heat the mixture and separate the ammonia from the water, with the ammonia being further heated at a nozzle (84) to activate the ammonia before injection into an upstream portion of the exhaust gas pipe.
Claims9
In an engine which includes means for combusting hydrocarbons in air to produce work wherein said means also produces a stream of exhaust gasses that contain nitrogen oxides, with the engine having an exhaust conduit through which the exhaust gasses are passed before being emitted into the atmosphere, the improvement comprising:
- a source of ammonia:
- an injector apparatus coupled to said source to receive ammonia therefrom and inject the ammonia into said exhaust has conduit;
- said source of ammonia comprises a container containing a mixture of ammonia and water.
The engine described including 3 including:
- a separation station that receives said heated mixture and separates liquid water from gaseous ammonia, and directs them along different paths, and that injects the gaseous ammonia into said exhaust conduit.
A method for reducing nitrogen oxides in the exhaust gasses of an engine that combusts hydrocarbon in the presence of air and that produces a stream of exhaust gasses, comprising:
- passing a mixture of ammonia and water out of a container, and injecting at least said ammonia into said stream of exhaust gasses.
Dependencies are inferred from the claim text.