| abstract |
A process for purifying the exhaust gases of heat engines characterized by the following steps executed in sequence: heating the exhaust gases to a temperature between 300degreC and 450degreC, and preferably of the order of 350degreC at 360degreC, - treatment of carbon oxides and hydrocarbons by catalytic oxidation, - addition of a reagent such as urea or ammonia, - treatment of nitrogen oxides by catalytic reduction, - cooling of the gas flow - treatment of sulfur oxides by mixing the gas stream with water in a venturi effect washer, - bubbling the gas stream into the water. |