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VERT: Diesel Nano-Particulate Emissions: Properties and Reduction Strategies
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Abstract
Increasing concern, about the health risk due to solid aerosols from engine combustion, has provoked more stringent imission limits, for soot particles in the range of pulmonary intrusion, at critical work-places (e.g. tunnel sites, see Table 1). Within the scope of the joint European project VERT, these emissions were characterized and their effective curtailment through exhaust gas after-treatment investigated. Diesel engines, irrespective of design and operating point, emit solid particulates in the range of 100 nm, at concentrations above 10 million particulates per cm3. Engine tests showed that a drastic curtailment of pulmonary intruding particulates seems not feasible by further development of the engine combustion, nor by reformulation of fuels, nor by deployment of oxidation catalytic converters. Particulate traps, however, can curtail the total solid particulate count, in the fine particulate range 15-500 nm, by more than two orders of magnitude. The effect can be reinforced through fuel additives, such as those promoting regeneration in particulate traps. A field test during 18 months (2000h) proved that several particulate trap systems meet this requirement. Thus the technical feasibility is basically established - the deployment of such particulate trap systems can therefore be demanded under critical exposures. Germany has already mandated the deployment of particulate traps in closed or partly closed working areas.
For the study of pulmonary intruding particulates from Diesel engines and the evaluation of the particulate traps systems, the usual gravimetric evaluation of the total particulate mass PM must be abandoned or at least enhanced. This is necessary as gravimetry is non-specific with respect to the chemical composition and the aerosol properties (such as size and surface) and, hence, delivers no toxically relevant information. The counted particulate concentration appears to be the significantly more specific and sensitive criterion. Industrially suitable and field deployable procedures should now be developed based on the dependable laboratory methods.
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Mayer, A., Czerwinski, J., Matter, U., Wyser, M. et al., "VERT: Diesel Nano-Particulate Emissions: Properties and Reduction Strategies," SAE Technical Paper 980539, 1998, https://doi.org/10.4271/980539.Also In
References
- Trapping Efficiency Depending on Particulate Size Mayer, Czerwinski Scheidegger SAE 960472
- VERT - Clean Diesel Engines for Tunnel Construction Mayer, Czerwinski et al. SAE 970478
- 1996
- “Dieselmotoremissionen” 1996 1996
- Aerosol Technology Hinds William C. John Wiley & Sons New York 1982
- Weinheim 1988
- Diesel exhaust as a Toxic Air Contaminant California Environmental Protection Agency Public Briefing 9 Mai 1997
- Penetration of Diesel Particle Filters evaluated by various Soot Analyzing Techniques Matter Czerwinski Mosimann Mayer Proceedings of the Workshop “Particle Measurement” ETH Zürich August 7 1997
- Formation of Carbon in Combustion The Influence of Fuel Additives Kasper Sattler Siegmann August 7 1997
- Passive Regeneration of Catalyst Coated Knitted Fiber Diesel Particulate Traps Mayer Emig Gmehling et al. SAE 960138
- Particle Size Distribution Downstream Traps of Different Design Mayer Egli Burtscher et al. SAE 950373
- The Formation of Carbon in Combustion and how to Quantify the Impact on Human health Siegmann K. H.C. Siegmann Europhysics News 28 2 1997
- Januar 1997