Thermographic Measurements of Volatile Particulate Matter

Paper #:
  • 2015-01-1992

Published:
  • 2015-09-01
DOI:
  • 10.4271/2015-01-1992
Citation:
Cheng, M., "Thermographic Measurements of Volatile Particulate Matter," SAE Technical Paper 2015-01-1992, 2015, doi:10.4271/2015-01-1992.
Pages:
5
Abstract:
Semi-volatile species in the exhaust can condense on the primary particulate matter (PM) forming significant secondary PM mass downstream1. We developed a new thermographic technique to measure the volatility of a particle population. The instrument is called vapor-particle separator (VPS)2. A two-parameter model was used to interpret the thermographic data3. These two parameters define volatilization potential and thermodynamic capacity of the particles. The volatization potential delineates the unique particle volatility, while the thermodynamic capacity illustrates the work required to eliminate the particles. The thermodynamic capacity is found much smaller for small particles than that for large particles.
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