Passive NO2 Regeneration and NOx Conversion for DPF with an Integrated Vanadium SCR Catalyst Haldor Topsoe A/S

Format:

Conference/Event

Author/Creator:

Johansen, Johansen, author.

Contributor:

Viecenz, Hannes

Widd, Anders

Zuther, Frank

Conference Name:

SAE 2016 World Congress and Exhibition (2016-04-12 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2016

Summary:

For trucks today, the diesel particulate filter (DPF) and SCR catalysts are combined in this sequential order in diesel exhaust systems with the drawback of insufficient temperature for the SCR catalyst during cold start and large volume. The problems can potentially be solved by integrating the SCR catalyst into the particulate filter as one multifunctional unit. For off-road and heavy-duty vehicles applications with fully managed passive NO2-soot regenerations, integration of V-based SCR formulations on the DPF (V-SCRonDPF) represents an attractive solution due to high sulfur resistance accompanied by low-temperature NOx conversion and improved fuel economy. Engine bench tests together with an NO2-active DOC show that it is possible to manage the NO2/NOx ratio so both a high NOx conversion and still a low soot balance point temperature is obtained. The soot balance point is almost unaffected by the fast SCR reaction when urea is introduced. For a full system, Engine DOC Urea(inj) V-SCRonDPF SCR ASC out on a MAN D 26 experimental engine, an NOx emission of 0.23 g/kWh well below the regulation was demonstrated for an off-road NRTC cycle, without any pressure drop increase over the VSCRonDPF and no soot accumulation measured by weight increase

Notes:

Vendor supplied data

Publisher Number:

2016-01-0915

Access Restriction:

Restricted for use by site license