Installation of exhaust gas and process for their operation.

Installing the exhaust gas (1) for a motor mobile internal combustion engine (2) comprising at least one pipe (3) exhaust gas, wherein the pipe (3) exhaust gas has at least one reaction catalytically active (4) with a catalyst (5) in which the long chain hydrocarbon contained in the exhaust gas are cracked, and wherein the catalyst (5) comprises an activated aluminosilicate (6) and has such a high acidity that this catalyst and long chain hydrocarbons cracked at temperatures below 230 ° Celsius, especially below 100o Celsius.