Primary measures, to reduce the NOx emissions from diesel engines, penalize the fuel consumption and aggravate the CO2 problem. Instead, an after-treatment system is proposed that permits optimum combustion and yet reduces the NOx by more than 95 %. Such installations are in operation for more than five years. Successful deployment on a short-haul ferry, subject to highly cyclic operation, began in Spring 1992. The chief features are high space-velocity (25000 1/h), urea as non-toxic reactant and rapid transient response. The attained results counter the misgivings about the SCR catalysis. Development aims at further halving the size thus facilitating service in off-highway vehicles such as locomotives and earth-movers. The integration of particulate traps using knitted micro-fibers is under development.
Off-highway exhaust gas after-treatment: combining urea-SCR, oxidation catalysis and traps
Abgasnachbehandlung bei Geländefahrzeugen und Lokomotiven: die Kombinierung von Urea-SCR, Oxidationskatalyse und Abscheider
SAE Technical Papers ; 1-12
1993
12 Seiten, 20 Bilder, 10 Quellen
Conference paper
English
Dieselmotor , Simulationsmodell , Verbrennungseigenschaft , Abgasströmung , Partikelströmung , Rußfilter , Monolith , numerisches Verfahren , Regenerierbarkeit , Verfahrensparameter , Temperaturverteilung , Sauerstoffgehalt , Flammausbreitung , Finite-Elemente-Methode , Spannungsanalyse , Rechneranwendung , Temperaturverhalten , Rissneigung , Strömungsgeschwindigkeit , Wärmekapazität , technische Beschreibung
Off-Highway Exhaust Gas After-Treatment:Combining Urea-SCR, Oxidation Catalysis and Traps
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