DPF SCR Combinations Integrated Systems to Meet Future LDV Emission Limits

Rusch, Klaus; Kaiser, Rolf; Hackenberg, Stefan

doi:10.4271/2006-01-0637

Cited by 7 publications

(5 citation statements)

References 3 publications

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“…With a DPF a very efficient elimination of solid particles (particle counts filtration efficiency (PCFE) up to 99.99 %) and with SCR a substantial reduction of NO x (K NOx over 90 %) are possible. Intense developments are on the way by the original equipment manufacturers (OEMs), and investigations were performed [1][2][3][4][5][6][7][8][9][10][11].…”

Section: Dpf+scrmentioning

confidence: 99%

Emission Reduction with Diesel Particle Filter with SCR Coating (SDPF)

Czerwiński

Zimmerli

Mayer³

et al. 2015

Emiss. Control Sci. Technol.

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The present paper informs about some results obtained with selective catalytic reduction (SCR) and with SDPF (a diesel particle filter (DPF) with SCR coating) on a medium duty research engine Iveco F1C. This work is a first attempt at evaluating the effects of a SDPF on non-legislated gaseous emissions and on secondary nanoparticles. Beside the limited gaseous emission components, NH 3 , NO 2 , and N 2

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Section: Dpf+scrmentioning

confidence: 99%

Emission Reduction with Diesel Particle Filter with SCR Coating (SDPF)

Czerwiński

Zimmerli

Mayer³

et al. 2015

Emiss. Control Sci. Technol.

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“…In various cases a DPF is connected by a wide-angled cone to the engine exhaust pipe. Examples are the recently developed catalytic DPFs − that simultaneously remove the PM and oxidize the effluent organic compounds, and the new DPFs − that reduce both the PM and NOx emissions. A potentially dangerous temperature excursion occurs following a rapid deceleration of the diesel engine or a sudden shift to idle.…”

Section: Discussionmentioning

confidence: 99%

“…Circumventing these occasional local temperature excursions is still a major technological challenge in the design, operation, and control of a DPF. Numerous experimental and theoretical studies have attempted to understand and predict the undesirable formation of the high temperature excursions in a DPF. − …”

Section: Introductionmentioning

confidence: 99%

“…Recently, catalytic DPFs have been developed, which simultaneously remove the PM and oxidize any emitted organic compounds. − Also, new DPF systems for simultaneous NOx and PM reduction are under intense development. − In these cases the exhaust pipe is connected to the larger diameter DPF by a wide-angled cone (diffuser). Stratakis and Stamatelos , experiments revealed that the cone caused mal-distribution of the inlet velocity to the various channels.…”

Section: Introductionmentioning

confidence: 99%

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Inlet Cone Effect on Diesel Particulate Filter Regeneration upon a Rapid Shift to Idle

Luss

2012

Ind. Eng. Chem. Res.

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The particulate matter (PM) emitted by a diesel engine is collected and then burned in a diesel particulate filter (DPF). A major technological challenge in the operation of the ceramic, often cordierite, filter is that a rapid shift to idle may create a local hot region with a temperature much higher than under stationary feed conditions. This excessive transient temperature rise may cause local melting or cracking of the ceramic filter. Almost all previous studies of temperature excursions during the DPF regeneration (combustion of the deposited PM) were of cases in which equal exhaust flow rate was fed to all the parallel inlet channels. The diesel engine exhaust pipe is sometimes connected to the DPF by a wide-angled cone (diffuser). This leads to a mal-distribution of the flow rate to the inlet channels and of the deposited PM. Simulations revealed that following a rapid shift to idle the highest regeneration temperature in a DPF fed by a cone exceeded that in one not fed by a cone and it may exceed the cordierite DPF melting temperature (1200 °C). Moreover, it may generate transient radial and axial temperature gradients several times higher than under stationary regeneration that may crack the cordierite DPF. The increase in the temperature gradient is especially large in the axial direction. One of the surprising findings is that the highest temperature attained following a step change to idle is not a monotonic function of the initial PM loading.

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“…The combination of diesel particle filters (DPF) and deNO x technology (SCR) is widely considered as the best solution, up to date, to minimize the emissions of Diesel engines. Intense developments are on the way by the OEM's and a lot of research is performed on the implementation of such technologies [2,3,4,5,6,7,8,9,10,11,12,13,14].…”

Section: Introduction and Objectivesmentioning

confidence: 99%

Diesel Emission with DPF+SCR in VERTdePN - Testing & amp; Potentials

Czerwiński¹,

Zimmerli²,

Mayer³

et al. 2011

SAE Technical Paper Series

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The most efficient way and the best available technology (BAT) to radically reduce the critical Diesel emission components particles (PM&NP) and nitric oxides (NO x) are combined exhaust gas aftertreatment systems (DPF+SCR). SCR (selective catalytic reduction) is regarded as the most efficient deNO x-system, diesel particle filters are most efficient for soot abatement. Today, several suppliers offer combined systems for retrofitting of HD vehicles. The presented results are part of the work in the international network project VERT *) dePN (de-activation, decontamination, disposal of particles and NO x), which has the objectives to establish test procedures and quality standards and to introduce the SCR-, or combined DPF+SCR-systems in the VERT verification procedure. Examples of results for some of the investigated systems are given and the most important findings are:

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DPF SCR Combinations Integrated Systems to Meet Future LDV Emission Limits

Cited by 7 publications

References 3 publications

Emission Reduction with Diesel Particle Filter with SCR Coating (SDPF)

Emission Reduction with Diesel Particle Filter with SCR Coating (SDPF)

Inlet Cone Effect on Diesel Particulate Filter Regeneration upon a Rapid Shift to Idle

Diesel Emission with DPF+SCR in VERTdePN - Testing & amp; Potentials

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