System and process for the reduction of harmful substances in engine exhaust gases

A system for reducing harmful substances in engine exhaust gases comprising:

• a fuel cell which is adapted to generate electrical energy and a steam-containing fuel cell exhaust gas during operation,
• a fuel tank for storing fuel which is to be supplied to an engine during operation,
• a condensing device which is connected to an exhaust gas outlet of the fuel cell so that steam-containing fuel cell exhaust gas is supplyable to the condensing device, and which is adapted to convert the steam contained in the fuel cell exhaust gas into the liquid state of aggregation by condensation and to introduce the water obtained as a result of the condensing process into the fuel in order to form a water/fuel mixture, and
• a water/fuel mixture line which is connected to the engine so that water/fuel mixture is supplyable to the engine,
• wherein the condensing device is further connected to a fuel outlet of the fuel tank so that steam-containing fuel cell exhaust gas and fuel is supplyable to the condensing device, wherein the condensing device is adapted to bring the steam-containing fuel cell exhaust gas into contact with the fuel in order to convert the steam contained in the fuel cell exhaust gas into the liquid state of aggregation by condensation, and wherein the water/fuel mixture line is connected to an outlet of the condensing device so that the water/fuel mixture formed in the condensing device is supplyable to the engine.