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Title: Volatility characterization of nanoparticles from single and dual-fuel low temperature combustion in compression ignition engines

Journal Article · · Aerosol Science and Technology
 [1];  [2];  [2];  [2];  [1]
  1. Univ. of Minnesota, Minneapolis, MN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Our work explores the volatility of particles produced from two diesel low temperature combustion (LTC) modes proposed for high-efficiency compression ignition engines. It also explores mechanisms of particulate formation and growth upon dilution in the near-tailpipe environment. Moreover, the number distribution of exhaust particles from low- and mid-load dual-fuel reactivity controlled compression ignition (RCCI) and single-fuel premixed charge compression ignition (PPCI) modes were experimentally studied over a gradient of dilution temperature. Particle volatility of select particle diameters was investigated using volatility tandem differential mobility analysis (V-TDMA). Evaporation rates for exhaust particles were compared with V-TDMA results for candidate pure n-alkanes to identify species with similar volatility characteristics. The results show that LTC particles are mostly comprised of material with volatility similar to engine oil alkanes. V-TDMA results were used as inputs to an aerosol condensation and evaporation model to support the finding that smaller particles in the distribution are comprised of lower volatility material than large particles under primary dilution conditions. Although the results show that saturation levels are high enough to drive condensation of alkanes onto existing particles under the dilution conditions investigated, they are not high We conclude that observed particles from LTC operation must grow from low concentrations of highly non-volatile compounds present in the exhaust.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1241466
Journal Information:
Aerosol Science and Technology, Vol. 50, Issue 5; ISSN 0278-6826
Publisher:
American Association for Aerosol ResearchCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 14 works
Citation information provided by
Web of Science

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Cited By (3)

Effects of multiple injection strategies on gaseous emissions and particle size distribution in a two-stroke compression-ignition engine operating with the gasoline partially premixed combustion concept
  • Bermúdez, Vicente; Ruiz, Santiago; Novella, Ricardo
  • Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, Vol. 233, Issue 10 https://doi.org/10.1177/0954407018802960
journal September 2018
Evolution and current understanding of physicochemical characterization of particulate matter from reactivity controlled compression ignition combustion on a multicylinder light-duty engine journal August 2016
Assessment on the consequences of injection strategies on combustion process and particle size distributions in Euro VI medium-duty diesel engine journal July 2019


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