Diesel Aerosol Sampling Methodology and the Mobile Laboratory
Sponsored by the Coordinating Research Council (CRC) and the Department of
Energy/National Renewable Energy Laboratory (DOE/NREL)
- Engine Manufacturers Association
- Southcoast Air Quality Management District
- California Air Resources Board
In collaboration with:
- West Virginia University
- Tampere University
- Paul Scherrer Institute
- Carnegie Mellon University
- Desert Research Institute
- UC Davis
The Mobile Emissions Laboratory (MEL)
Swanson, J. J., D. B. Kittelson, W. F. Watts, D. D. Gladis, M.V. Twig. 2009.
Influence of Storage and Release on Particle Emissions from New and Used CRTs.
Atmospheric Environment, 43:3998-4004.
Link To Paper
This paper describes the results of three experiments performed with Continuously
Regenerating Traps (CRTs®) in a controlled laboratory setting to elucidate the effects of fuel sulfur content,
filter age, and storage and release effects on particle concentration. In the first experiment, a new CRT was
tested using near zero sulfur Fischer-Tropsch fuel and low sulfur lubricating oil (420 ppm). The objective was
to measure particle emissions from an emission control device that had not previously been exposed to sulfur
under a variety of operating and dilution conditions. Next, a used CRT was evaluated using the same fuel and
lubricating oil. Finally, the used uncatalyzed Diesel particulate filter (DPF) from the used CRT was replaced
with a new, uncatalyzed DPF. The emissions from the used Diesel oxidation catalyst (DOC) + new DPF were evaluated
and compared to those of the used CRT.
Our laboratory results show that particle number emissions from the new CRTs are
99.9% lower than equivalent used CRT data collected on-road at an exhaust temperature of 370 °C. Even as the new
CRT temperature was increased to almost 400 °C, emission levels were still at background levels for roadway aerosol
and no nucleation mode was observed. With the used CRT, the nucleation mode particle number concentration increased
sharply at an exhaust temperature of about 380 °C and remained high for the duration of the test. Mass emissions
were estimated and found to exceed US EPA on-road standards. The used DOC + new DPF led to essentially the same
number emissions as the used CRT, suggesting that these emissions arise mainly from release of sulfates stored by
the DOC and not the uncatalyzed DPF.
CRC E-43: Diesel Aerosol Sampling Methodology
CRC Project Summary (19KB)
CRC E-43 Exectuive Summary
CRC E-43 Technical Summary
Impact of Low-Emission Diesel
on Underground Mine Air Quality (338K) Appendices (297K) Project Summary (23K)
by Susan T. Bagley, Wintrhop F. Watts, Jr., Jason P. Johnson, David B.
Kittelson, John H. Johnson, and James J. Schauer (2002)
Presentation to 5th ETH Conference on
Nanoparticle Measurement, Zurich, Switzerland, August 6, 2001: "Response
of PAS and DC to Size Fractionated Particles"
Presentation to 5th ETH
Conference on Nanoparticle
Measurement, Zurich, Switzerland, August 7, 2001: "On-Road Measurements of
Spark Ignition Nanoparticle Emissions"
Presentation to 7th DEER Workshop,
Portsmouth, VA, August 5-9, 2001: "Fine Particle (Nanoparticle) Emissions
on Minnesota Highways"
Presentation to the 11th CRC On-road Vehicle Emissions
Workshop, San Diego, CA, March 26-28, 2001
Sampling Methodology: On-road and
laboratory measurements of nanoparticles from Diesel engines (240K)
Presentations by David Kittelson (MS PowerPoint)
modified: 14 August 2009
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