Patent ID: 7793506

Claim:
A system for treating exhaust gas discharged from an engine undergoing static testing so as to minimize pollutants discharged to the atmosphere, said system comprising: an engine operable to discharge an exhaust gas stream from an engine exhaust nozzle; an engine thrust mount for restraining movement of said engine; a duct system having a duct inlet and a duct outlet for guiding an exhaust gas stream entering said duct inlet toward said duct outlet; an adapter coupling said engine exhaust nozzle to said duct inlet, said adapter being physically configured to minimize the amount of free air entrained by said exhaust gas stream entering said duct inlet; said duct system including an upstream diffuser section, an intermediate converter section, and a downstream exhaust section; wherein said diffuser section is physically configured to reduce the velocity of said exhaust gas stream; said converter section includes injector means for introducing an oxidizer and a coolant into said exhaust gas stream; and wherein said exhaust section is physically configured to reduce the velocity and temperature of said exhaust gas stream exiting said converter section.