Abstract: An exhaust system for an internal combustion engine of a motor vehicle, includes an SCR catalytic converter for carrying out selective catalytic reduction of pollutants contained in the exhaust gas of the internal combustion engine using a reducing agent, wherein the SCR catalytic converter is arranged downstream of a turbine of an exhaust gas turbocharger, and a feed device for feeding the reducing agent into the exhaust gas at a feed position arranged upstream of the turbine is provided. A nitrogen oxide storage catalytic converter is arranged upstream of the feed position.

Abstract: The invention relates to a process for heating a catalytic converter, a nitric oxide storage catalytic converter and/or particle filter in particular mounted in an exhaust system of a diesel internal combustion engine of a vehicle, to a desulfation and/or decarbonization temperature, a process in which the catalytic converter is heated to a desulfation and/or decarbonization temperature at the beginning of the desulfation and/or decarbonization phase as regeneration phase. A rich exhaust gas flow is delivered periodically to the catalytic converter for the purpose of direct heating of this catalytic converter to a regeneration temperature, in such a way that the unburnt exhaust gas components, hydrocarbons and carbon monoxides in particular, react to the oxygen stored in the catalytic converter and the thermal energy released in the process heats the catalytic converter to a regeneration temperature.

Abstract: The invention concerns a process for the preparation of a vanadia SCR-catalyst supported on titania. The process is characterized in that the catalyst is prepared by dispersing titania in an ammonium metavanadate (NH4VO3) solution, adjusting the pH of the solution to a value of 7.0-7.1 by NH4OH and HNO3, stirring the resulting suspension for a time sufficient for complete adsorption of the vanadium compound on titania, filtering the suspension and drying and calcining the resulting catalyst compound.