Patent ID: 6601385
Filing Date: 2003-08-05
Classification: B01D,F01N,Y02T

Abstract:
A selective catalytic reduction device for engine exhaust comprising:a housing having an upstream inlet for receiving said exhaust, and a downstream outlet for discharging said exhaust; an injector in said housing for injecting a solution comprising a source of ammonia to react with and reduce NOx in said exhaust; a catalyst in said housing downstream of said injector; an inertial impactor in said housing between said injector and said catalyst and impacted by said exhaust and said solution, wherein said impactor holds said solution to enhance ammonia reaction with NOx, said impactor is nonporous, and wherein said impactor and the injection rate from said injector are selected to satisfy the following condition: the solution evaporation rate at said impactor is greater than the injection rate at said injector.