CMS - An Evolution of the CVS - A Full Flow, Constant Mass Flow, Sampling System

Ryan, Carl J.; McDonald, Joseph; Silvis, William M.; Williamson, James R.; Marek, Gerald; Kreft, Norbert

doi:10.4271/2006-01-1514

Cited by 3 publications

(1 citation statement)

References 6 publications

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“…During testing over steady-state cycles where a CDPF was not used, samples were taken from a constant-mass-flow dilution system using annular dilution to prevent rapid overloading of the sample train PM filter . For all transient cycle tests and for all steady-state testing utilizing a CDPF, the exhaust was sampled directly from the exhaust system.…”

Section: Experimental Methodsmentioning

confidence: 99%

Emissions of PCDD/Fs, PCBs, and PAHs from a Modern Diesel Engine Equipped with Catalyzed Emission Control Systems

Laroo

Schenk

Sanchez

et al. 2011

Environ. Sci. Technol.

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Exhaust emissions of 17 2,3,7,8-substituted chlorinated dibenzo-p-dioxin/furan (CDD/F) congeners, tetra-octa CDD/F homologues, 12 2005 WHO chlorinated biphenyls (CB) congeners, mono-nona CB homologues, and 19 polycyclic aromatic hydrocarbons (PAHs) from a model year 2008 Cummins ISB engine were investigated. Testing included configurations composed of different combinations of aftertreatment including a diesel oxidation catalyst (DOC), catalyzed diesel particulate filter (CDPF), copper zeolite urea selective catalytic reduction (SCR), iron zeolite SCR, and ammonia slip catalyst. Results were compared to a baseline engine out configuration. Testing included the use of fuel that contained the maximum expected chlorine (Cl) concentration of U.S. highway diesel fuel and a Cl level 1.5 orders of magnitude above. Results indicate there is no risk for an increase in polychlorinated dibenzo-p-dioxin/furan and polychlorinated biphenyl emissions from modern diesel engines with catalyzed aftertreatment when compared to engine out emissions for configurations tested in this program. These results, along with PAH results, compare well with similar results from modern diesel engines in the literature. The results further indicate that polychlorinated dibenzo-p-dioxin/furan emissions from modern diesel engines both with and without aftertreatment are below historical values reported in the literature as well as the current inventory value.

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Section: Experimental Methodsmentioning

confidence: 99%