Potentials for NOx and CO2 reduction of combined NSC + passive SCR system in Diesel passenger car application

• Autorzy: Wittka T. , Holderbaum B.
• Języki publikacji: EN

Abstrakty

EN

The stringent pollutant and CO₂ emission limitation in upcoming legislation norms for Diesel passenger car applications force the introduction of exhaust aftertreatment systems with maximum purification and energetic efficiency. The state-off-the-art technologies for NO_x reduction, NO_x storage and reduction catalyst (NSC) and selective catalytic reduction catalyst (SCR), show challenges for robust performance under strongly extended emission relevant operation conditions from cold start to high engine load and speed. One technical solution is the combination of NSC and passive SCR. This paper presents the experimental results obtained in the EUproject “Powerful”. On engine test bench and demonstrator vehicle, an exhaust aftertreatment system combining NSC, passive SCR and fuel reformer technology was developed and experimentally investigated steady-state and on road. The engine independent NSC operation offers potentials for lowered fuel consumption penalty by avoiding engine rich operation. The intrinsic NH₃ formation during the NSC regeneration is used for additional NO_x conversion on the passive SCR and reduces NO_x and CO₂ emission.

Słowa kluczowe

EN

exhaust aftertreatment; NSC; Selective Catalytic Reduction; SCR; fuel reformer

PL

oczyszczanie spalin; selektywna redukcja katalityczna

• Wydawca: Polskie Towarzystwo Naukowe Silników Spalinowych
• Czasopismo: Combustion Engines
• Rocznik: 2014
• Tom: R. 53, nr 2
• Strony: 68--76
• Opis fizyczny: Bibliogr. 10 poz., il., wykr.

Twórcy

autor

Wittka T.

• Institute for Combustion Engines (VKA) at the RWTH Aachen University (Germany)

autor

Holderbaum B.

• FEV GmbH in Aachen (Germany)

Bibliografia

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• [6] Partridge W.P., Choi J.-S., NH3 formation and utilization in regeneration of Pt/Ba/Al2O3 NOx storage-reduction catalyst with H2, Applied Catalysis B: Environmental 91 (p. 144–151), 2009.
• [7] Liu Y., Zheng Y., Harold M.P., Luss D., Lean NOx reduction on LNT-SCR dual-layer catalysts by H2 and CO, Applied Catalysis B: Environmental 132–133 (p. 293–303), 2013.
• [8] Weibel M., Waldbüßer N., Wunsch R., Chatterjee D., Bandl-Konrad B., Krutzsch B., A Novel Approach to Catalysis for NOx Reduction in Diesel Exhaust Gas, Topics in Catalysis 52 (p. 1702–1708), 2009.
• [9] Kupe J., Bosch R.H., Bonadies J.V., Kirwan J.E., Demonstration of a Fuel Reformer System for Meeting Future Diesel Vehicle Low Emission Standards, 15th Aachen Colloquium Automobile and Engine Technology, 2006.
• [10] Wittka T., Holderbaum B., Lüers B., Körfer T., New Exhaust Purification Potentials by Combining LNT-, SCR- and Reformer-Technology (EU „Powerful“), 22nd Aachen Colloquium Automobile and Engine Technology 2013, Aachen.