Modeling of Non-Road Diesel Exhaust Aftertreatment Systems: Diesel Oxidation and Selective Catalytic Reduction Catalysts Johnson Matthey Technology Centre

Format:

Conference/Event

Author/Creator:

Desai, Desai, author.

Contributor:

Ahmadinejad, Mehrdad

Stevenson, Joseph W.

Tutuianu, Monica

Watling, Timothy C.

York, Andrew P.E.

Conference Name:

SAE 2010 Powertrains Fuels & Lubricants Meeting (2010-10-25 : San Diego, California, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2010

Summary:

The aftertreatment challenge in the non-road market is makingthe same system work and fit not just in one machine, but inhundreds of different machines, some of which can be used for manydifferent purposes. This huge diversity of applications and therelatively small unit numbers for each application, coupled withthe rapid introduction of new standards and the very highperformance needed from the engines and machines, requires asophisticated approach to product development. Furthermore, asemissions requirements become ever more stringent, designing asystem to meet the legislation subject to packaging and costconstraints becomes progressively more difficult. This is furtherexacerbated by increasing system complexity, where more than onetechnology may be required to control all the legislated pollutantsand/or an active control strategy is involved. Also a very highdegree of component integration is required. Thereforeaftertreatment system modeling is an extremely valuable tool inaiding design of systems that can meet all these challenges.Here the application of 1-dimensional numerical models, based onchemical kinetics derived for real-world catalysts, for a vanadiumoxide ammonia selective catalytic reduction (SCR) de-NOX catalystand a PGM-based diesel oxidation catalyst (DOC) are described. Bothmodels have been developed with particular emphasis on thesimulation of emissions control performance for non-roadvehicles/engines over the highly transient Non-Road Transient Cycle(NRTC).These models have then been applied to investigate thesensitivity of various design parameters on the performance of thesystem. In particular, the effect of inlet NO₂/NOX, ammonia toNOX ratio, minimum urea injection temperature and catalyst volumeon an SCR-only system and the effect of DOC volume and PGM loadingon a DOC + SCR system have been investigated. These are importantfactors in the design of effective and flexible non-road emissionscontrol systems

Notes:

Vendor supplied data

Publisher Number:

2010-01-2092

Access Restriction:

Restricted for use by site license