Diesel Solid Nanoparticle Emissions - Heavy-Duty Vehicle

This page last reviewed February 6, 2012


Background

The current regulatory gravimetric methods used for the determination of emissions will have difficulty accurately quantifying Particulate Matter (PM) mass emissions as emissions standards continue to get more stringent. The European Particle Measurement Program (PMP) is a particle measurement protocol which aims to measure solid particle number emissions to possibly complement regulatory mass measurements. The PMP protocol is included in Euro 5/6 proposed emission regulations. Air Resources Board sponsored a study to critically investigate the potential of PMP protocol for emissions from heavy-duty vehicles and engines titled: “Evaluation of the Proposed New European Methodology for Determination of Particle Number Emissions and its Potential in California for In-use Screening.” This study found there are a significant number of apparently solid, sub-23nm particles that can survive the PMP volatile particle remover. The nature of those sub- 23nm particles needs to be revisited and deserves to be thoroughly investigated.

This project will investigate the penetration and formation of particles in Europe’s current PMP protocol sampling system, and assess the impact of those processes on the PMP-compliant measurement of solid particle number emissions.


References

Publications for Peer-reviewed Journals

  • Zheng et al., (2012). Solid Particle Number Emissions from Heavy-duty Diesel Vehicles under Real-world Driving Conditions and Standard Testing Cycles. in preparation
  • Zheng et al. (2011), Investigation of solid particle number measurement: Existence and nature of sub 23 nm particles under PMP methodology. Journal of Aerosol Science, 2011, 42(12), 883-897. Link

Conference Proceedings

  • Zheng et al., (2011). Investigation of Solid Particle Number Measurement: Existence and Nature of Sub 23 nm Particles under PMP Methodology. Western States Section of the Combustion Institute (WSSCI) Fall 2011 Meeting, October 16-18, 2011, Riverside, California. Paper (PDF - 1,226KB)
  • Zheng et al., (2011). Measurement of Diesel Engine Emitted Nanoparticles. 7th National Meeting of the US Combustion Institute, March 20-23, 2011, Atlanta, Georgia. Paper (PDF - 561KB)

Conference Presentations

  • Zheng et al., (2012). Comparison of Particle Mass (PM) and Particle Number (PN) Emissions from a Heavy-Duty Diesel Vehicle under Real-World Driving Conditions and a Standard Testing Cycle. 22nd CRC On-Road Emissions Workshop, March 25-28, 2012, San Diego, California. in preparation
  • Zheng et al., (2011). Investigation of Solid Particle Number Measurement: Existence and Nature of Sub 23 nm Particles under PMP Methodology. Western States Section of the Combustion Institute (WSSCI) Fall 2011 Meeting, October 16-18, 2011, Riverside, California. Presentation (PDF - 1,698KB)
  • Zheng et al., (2011). Solid Particle Number Emissions from Heavy-Duty Diesel Vehicles under Real-World Driving Conditions and Standard Testing Cycles. American Association for Aerosol Research 30th Annual Conference, October 3-7, 2011, Orlando, FL. Poster (PDF – 1,373KB)
  • Jung et al., (2011). Measurement of Diesel Solid Nanoparticle Emissions Using a Catalytic Stripper for Comparison with Europe's PMP Protocol. 2011 Directions in Engine-Efficiency and Emissions Research (DEER), October 3-6, 2011, Detroit, Michigan. Presentation (PDF – 1,473KB)
  • Jung et al., (2011). Measurement of Diesel Solid Nanoparticle Emissions Using a Catalytic Stripper for Comparison to Europe’s PMP Protocol. 15th ETH Conference on Combustion Generated Nanoparticles, June 26–29t, 2011, Zurich, Switzerland. Presentation (PDF – 1,357KB)
  • Zheng et al., (2011). Measurement of Diesel Engine Emitted Nanoparticles. 7th National Meeting of the US Combustion Institute, March 20-23, 2011, Atlanta, Georgia. Presentation (PDF – 2,034KB)
  • Jung et al., (2010). Measurement of Diesel Solid Nanoparticle Emissions. 29th American Association for Aerosol Research Annual Conference, October 3-7, 2010, Portland, Oregon. Poster (PDF – 1,113KB)

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