F2008-06-024
NOx Aftertreatment Systems for Diesel Engines
Abstract
The focus for the development of future power train concepts lies both on reduction of exhaust gas emissions and on a reduction in fuel consumption and thus CO2 emissions, while achieving simultaneous increase in driving enjoyment. Diesel engines have attained a constantly growing market share in Europe over recent years. A substantial success factor will be the development of an innovative exhaust gas aftertreatment concept. Among the possible technologies for the reduction of nitrogen oxides, NOx in lean exhaust gas which are available, the NOx storage catalyst technology has become the generally-accepted choice for the current Diesel Bluetec systems from DaimlerChrysler. In the heavy duty sector, as well as for the introduction of heavy passenger vehicles for the BIN5 legislation in the USA, the urea-SCR technology is already in use in series production or is being developed for series production. Apart from extension of the active temperature window, improvement of high temperature stability is the most important development target for NOx storage catalysts in the field of diesel engines. In this paper, requirements and trends for future NOx aftertreatment technologies are being discussed. Furthermore possible synergies of the different aftertreatment systems with NOx storage catalyst systems and/or SCR-technologies are discussed in detail.
This abstract is supplemented by a PDF, which can be viewed here.
Session: Exhaust Gas Aftertreatment